2011年11月, 平成23年度 関東地方発明表彰（発明奨励賞）, 液滴転落挙動測定システム, 公益社団法人 発明協会
酒井宗寿
出版社・新聞社・財団等の賞

2009年10月22日, 色材協会賞（技術賞）, 液滴転落挙動解析システムの開発, 色材協会
酒井宗寿;橋本綾子;吉田直哉;亀島欣一;鈴木俊介;中島 章;福山紅陽
国内学会・会議・シンポジウム等の賞

2009年10月, 色材協会賞（技術賞）, 液滴転落挙動解析システムの開発, 色材協会
酒井宗寿,橋本綾子,吉田直哉,亀島欣一,鈴木俊介,中島 章,福山紅陽
国内学会・会議・シンポジウム等の賞

〔主要な業績〕Time dependence of the dominant mechanisms of self-propelled droplets by Leidenfrost phenomenon on Zn plate surfaces with and without ZnO nanorods
Takuya Hirosawa; Ken Yamamoto; Munetoshi Sakai; Yasuhide Mochizuki; Toshihiro Isobe; Sachiko Matsushita; Akira Nakajima, Elsevier
Materials Chemistry and Physics, 2022年09月01日, ［査読有り］

Droplet motion by Leidenfrost phenomenon on Zn plate surfaces with and without ZnO nanorods
Takuya Hirosawa; Munetoshi Sakai; Ken Yamamoto; Masahiro Motosuke; Toshihiro Isobe; Sachiko Matsushita; Akira Nakajima, Elsevier
Materials Chemistry and Physics, 2021年08月, ［査読有り］

表面改質による高度撥水性の発現と抗ウイルス・抗菌性　　　　　　　　　　　　　　　
酒井宗寿・中島 章, 筆頭著者, セラミックス協会
セラミックス, 2021年04月, ［査読有り］, ［招待有り］

撥水性固体表面における水滴の静的動的濡れ性に関する研究の最近のトピックス
酒井 宗寿・中島 章, 筆頭著者
色材協会誌, 2020年08月, ［査読有り］

材料表面の濡れ性の基礎と制御技術,―撥水・親水性・液体滑落性表面の作製方法と応用展開―　　　　　　　　　　　　　　　
酒井宗寿・中島 章, 筆頭著者
塗装工学, 2020年05月, ［査読有り］, ［招待有り］

Carbon dioxide adsorption properties of K-Al-Fe–based oxides prepared from a porous polymer monolith template　　　　　　　　　　　　　　　
Keita Ikeue; Masashige Suzuki; DaisukeYoshimoto; Ryutaro Usukawa; Munetoshi Sakai; Tarun Cha; d; Vagvala; Vit Kalousek
Journal of Solid State Chemistry, 2019年, ［査読有り］

最近の撥水技術と水ハーベスタ　　　　　　　　　　　　　　　
酒井宗寿; 中島 章
Journal of the Ceramic Society of Japan, 2018年, ［査読有り］

Sliding of water-glycerol mixture droplets on hydrophobic solid-liquid bulk composites using Ti plates with a fibrous TiO2 layer
Hirokazu Takahashi; Yuta Higashino; Munetoshi Sakai; Toshihiro Isobe; Sachiko Matsushita; Akira Nakajima, Fibrous TiO2 layer was formed on a metal Ti plate by soaking it in a KOH solution and subsequently firing it in air at 600 A degrees C for 2 h. Hydrophobic solid-liquid bulk composite (SLBC) was prepared by impregnation of a commercial silicone-based oil into the fibrous TiO2 layer after coating with fluoroalkylsilane. Based on the spreading coefficients from interface energies, the topmost solid surface of the SLBC was covered by the oil film when a water-glycerin mixture droplet was placed on the surface. The mixture droplets slid down the SLBC with acceleration. Particle image velocimetry (PIV) analysis revealed rolling and slipping modes in the sliding of the mixture droplets on the SLBC surface. During sliding, the coefficient of the viscous drag force was correlated with the velocity ratio (U (total)/U (slip)). Results suggest that the estimation of the internal fluidity of the liquid droplet was feasible to some degree by evaluating the coefficient during droplet sliding with constant acceleration on the SLBC surface., SPRINGER
JOURNAL OF MATERIALS SCIENCE, 2018年01月, ［査読有り］

Comparative study of the dynamic hydrophobicity of fluoroalkylsilane coatings tilted at acute and obtuse angles
Y. Higashino; H. Takahashi; M. Sakai; T. Isobe; S. Matsushita; A. Nakajima, The relation between surface homogeneity and internal fluidity for a droplet sliding on a surface tilted at acute and obtuse angles was investigated using two hydrophobic fluoroalkylsilane (FAS) coatings with different roughness. The coatings (FAS-smooth and FAS-rough) were prepared on an Si substrate using chemical vapor deposition or soaking methods and were tilted at 35° or 145°. Sliding velocity of water droplets on the surface tilted at 145° was greater than that tilted at 35° for both coatings. For 35° tilting, the dominant mode of the sliding velocity was slipping for FAS-smooth, whereas rolling governed the entire sliding velocity for FAS-rough. The slipping mode was more important than the rolling one for both coatings when they were tilted at 145°. The change of slipping velocity was more remarkable than that of rolling one for both coatings between 35° and 145° tilting. Results show that the difference in gravity direction and contact area of the droplets contributed to this tilt angle dependence of the sliding velocity. When a droplet slid down with acceleration on FAS-smooth surface, the coefficient of the viscous drag force correlated with the velocity ratio (Utotal/Uslip)., Springer New York LLC
Journal of Coatings Technology and Research, 2018年, ［査読有り］

Synthesis and characterization of metal-diaminobipyridine complexes as low-cost co-catalysts for photo-sensitized hydrogen evolution.
Tarun Cha; Vagvala Takashi Ooyabe; Munetoshi Sakai; Yusuke Funasako; Makoto Inokuchi; Wataru Kurashige; Yuichi Negishi; Vit Kalousek; Keita Ikeue
Inorganica Chimica Acta, 2018年, ［査読有り］

K-Al-based mixed oxides as high-capacity carbon dioxide adsorbents
Keita Ikeue; Masashige Suzuki; Munetoshi Sakai; Tarun Chand Vagvala; Vit Kalousek, K-Al-based mixed oxides (KAl6O9.5) with mullite structures were synthesized as CO2 adsorption materials using a polymerized complex method. Al3+ sites in the octahedral AlO6 units of IC-Al-based mixed oxides were substituted with various metal ions with +2 or +3 valence states to enhance basicity. Among these samples, the Fe-introduced sample (KAl5.5Fe0.5O9.5) showed 130 times higher CO2 adsorption capacity than that of Li4SiO4. Raman spectra of these samples indicated that large distortions of the AlO6 unit were observed only for the Fe-introduced sample. Local polarization caused by such distortions could induce increased basicity of this sample. (C) 2017 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
CHEMICAL PHYSICS LETTERS, 2017年06月, ［査読有り］

固体表面の動的撥水性に関する最近の話題
酒井宗寿; 中島 章, 色材協会
色材協会誌, 2017年, ［査読有り］

Droplet viscosity effects on dynamic hydrophobicity of a solid–liquid bulk composite prepared from porous glass
K. Yokoyama; M. Sakai; T. Isobe; S. Matsushita; A. Nakajima, Hydrophobic porous glass plates were prepared by coating a fluorosilane (FAS17) onto a commercial porous glass (average pore size, approx. 1 mu m). Based on the spreading coefficients from interface energies, we prepared solid-liquid bulk composites (SLBC) without direct contact between the solid surface and liquid droplet by impregnation of silicone oil into the silane-coated porous glass. Impregnating the oil into the porous glass decreased both the sliding angle (ca. 20A degrees -> ca. 5A degrees) and contact angle (ca. 135A degrees -> ca. 100A degrees). The sliding velocity of the liquid droplets on the SLBC decreased when the droplet viscosity was increased using a water-glycerin mixture. Analysis by particle image velocimetry revealed that increasing the viscosity remarkably decreases the slipping motion and increases the contribution of rolling. Results suggest that the practical internal fluidity of the droplets during sliding on the SLBC is governed by the combination of the droplet liquid and the oil impregnated into the porous media., SPRINGER
Journal of Materials Science, 2017年01月, ［査読有り］

Functions of phase interface for wettability and organic photocatalyst　　　　　　　　　　　　　　　
M. Sakai
International Workshop for Interplay between Nanocarbon, Supramolecule, and Biochemistry, Okayama (Japan)., 2016年03月, ［査読有り］, ［招待有り］

はっ水性, 親水性を生かした新しい表面利用技術
酒井宗寿; 中島 章, 一般社団法人 表面技術協会
表面技術, 2016年, ［査読有り］

Bio-inspired highly hydrophobic surface with ecdysis behavior using an organic monolithic resin and titanium dioxide photocatalyst
Munetoshi Sakai; Tomoya Kato; Norio Ishizuka; Toshihiro Isobe; Akira Nakajima; Akira Fujishima, In order to develop a durable highly hydrophobic surface, a biomimetic design was developed by combining an organic monolithic resin, TiO2 photocatalyst, and polytetrafluoroethylene particles. An accelerated weathering resistance examination revealed that the highly hydrophobic surface maintained a water contact angle exceeding 140A degrees for 6 years. Moreover, high antiwear performance was confirmed by a rubbing test. Since the organic monolithic resin had co-continual structures with interconnected pores, new surface with a microstructure appeared continually by removal of the damaged surface. On the other hand, decomposition of organic compounds by TiO2 photocatalyst enabled self-etching of the damaged top layer of the organic monolithic resin. The flowing water due to rainfall or physical scraping contributed to the removal of the damaged surface. However, the film thickness after surface restoration was approximately constant. In addition, dynamic hydrophobicity could be improved when interconnected pores of the organic monolithic resins were impregnated with perfluorocarbon liquid. Thus, we have addressed essential issues and proposed a new method for designing hydrophobic surfaces with high durability., SPRINGER
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2016年01月, ［査読有り］

Silver phosphate/single wall carbon nanotube composite with enhanced photoactivity and stability under visible light irradiation　　　　　　　　　　　　　　　
V. Kalousek; R. Yabunaka; M. Sakai; K. Takaguchi; K. Ikeue
Pacifichem, Honolulu (USA)., 2015年12月, ［査読有り］

Effect of composition between SrTiO3 photocatalyst and carbon dioxide adsorbent　　　　　　　　　　　　　　　
M. Sakai; T. Itai; V. Kalousek; N. Toshima1; K. Ikeue
Pacifichem, Honolulu (USA)., 2015年12月, ［査読有り］

Preparation and hydrophobicity of solid/liquid bulk composite using porous glass and low-surface-energy oil　　　　　　　　　　　　　　　
K. Yokoyama; Y. Takada; M. Sakai; T. Isobe; S. Matsushita; A. Nakajima
Pacifichem, Honolulu (USA)., 2015年12月

Preparation and hydrophobicity of solid–liquid bulk composite using porous glass and fluorinated oil
Y. Takada; M. Sakai; T. Isobe; S. Matsushita; A. Nakajima, Hydrophobic porous glass plates were prepared by coating a fluorosilane (FAS17) onto a commercial porous glass (average pore size, approx. 1 mu m) with surface modification by colloidal silica (approx. 100 nm). Then porous glass-fluorinated oil composites were prepared by subsequent impregnation of two fluorinated oils with similar surface energy but differing viscosity. Both the sliding angle (similar to 5A degrees A -> A similar to 0A degrees) and contact angle (similar to 150A degrees A -> A similar to 115A degrees) were decreased by impregnating fluorinated oil into the porous glass. The composites possessed excellent sustainability of their small sliding angle under exposure in turbulent water flow. The composite exhibited higher sliding velocity than that of a normal hydrophobic coating. The composite with high-viscosity oil exhibited a lower sliding velocity for a water droplet than that with low-viscosity oil. Particle image velocimetry revealed that the dominant sliding mode for water droplets on the composites was slipping. Results suggest that viscous dissipation at the wetting ridge (oil meniscus at the three-phase contact line) plays an important role in the moving behavior of water droplet on the composites. The superiority in dynamic hydrophobicity for the composites was retained even when the droplet was sandwiched between two parallel samples., SPRINGER
Journal of Materials Science, 2015年12月, ［査読有り］

Adhesion and Friction Force on Various Smooth Hydrophobic Silane Coatings
Takumi Miyamoto; Munetoshi Sakai; Toshihiro Isobe; Sachiko Matsushita; Akira Nakajima, Various smooth hydrophobic silane coatings were prepared on a Si substrate using CVD. Then adhesion and friction force for these coatings were evaluated using force curve measurements and friction force microscopy with Si3N4-coated Si cantilevers in the ambient atmosphere. The adhesion force depended on the cosine of the water contact angle, which suggests that it was governed by the capillary force. The water contact angle, packing density, rigidity, and molecular interaction contribute to the friction coefficient of the coatings., CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2015年05月, ［査読有り］

Investigation of droplet jumping on superhydrophobic coatings during dew condensation by the observation from two directions
Kosuke Yanagisawa; Munetoshi Sakai; Toshihiro Isobe; Sachiko Matsushita; Akira Nakajima, Superhydrophobic coatings with nanoscale random roughness structure were prepared onto a Si substrate using boehmite (AlOOH) particles and hydrophobic silanes. The samples were cooled by a Peltier cooling element. Then spontaneous jumping behavior of the water droplets that had condensed on the coatings was observed from two directions (top-view and side-view) using high-speed camera systems. Spontaneous jumping of water droplets occurred subsequent to the coalescence of more than two water droplets, deformation, and shape recovery. Small droplets exhibited high initial jumping velocity, which decreased concomitantly with increasing difference in droplet size before coalescence. The actual jumping velocity was lower than the theoretical one, suggesting the existence of energy dissipation. When the sample was declined at 30, the jumping frequency of water droplets fluctuated against the cooling time with repetition of the increasing-decreasing cycle, and sustained a certain value. The water droplet jumping height was increased remarkably under an external electric field. The droplet possessed positive charge. Coulombic force was expected to contribute to this phenomenon. (C) 2014 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
APPLIED SURFACE SCIENCE, 2014年10月, ［査読有り］

Static and dynamic hydrophobicity of alumina-based porous ceramics impregnated with fluorinated oil
Yuta Tsuruki; Munetoshi Sakai; Toshihiro Isobe; Sachiko Matsushita; Akira Nakajima, Using phase separation, alumina-based porous ceramics with three-dimensional frameworks were prepared, with fine structural roughness created by subsequent hot-water treatment. The pore volume of the porous alumina and its specific surface area increased concomitantly with increasing hot-water treatment time. Porous alumina/fluorinated oil bulk composites were prepared by coating hydrophobic silane onto the porous ceramic surface and subsequently impregnating fluorinated oil. A wetting ridge formed at the bottom of the water droplets on the composites. Partial contact between the water and solid surface was inferred from a comparison of interface energies in the system. The composites provided a smaller sliding angle (SA) than that of the sample without impregnating fluorinated oil. The composite with fine roughness exhibited longer sustainability of a small SA than that without fine roughness. Particle image velocimetry revealed that the dominant sliding mode for water droplets on this composite was slipping. The droplets moved on the surface under an external electric field. Coulombic force contributes to this motion., CAMBRIDGE UNIV PRESS
JOURNAL OF MATERIALS RESEARCH, 2014年07月, ［査読有り］

Comparative study of the impact and sliding behavior of water droplets on two different hydrophobic silane coatings
Akira Nakajima; Takumi Miyamoto; Munetoshi Sakai; Toshihiro Isobe; Sachiko Matsushita, Smooth hydrophobic silane coatings were prepared on a Si substrate using ODS (CH3(CH2)(17)Si(OCH3)(3) and FAS17 (CF3(CF2)(7)(CH2)(2)Si(OCH3)(3)). Results obtained using ellipsometry and Kelvin force microscopy suggest that ODS molecules in the coating are tilting or inflected, whereas those of FAS17 are more normal to the substrate. Impact and sliding behaviors of water droplets on the respective surfaces were investigated using a 15 mu L water droplet by varying the droplet release height. Droplets on ODS slid down faster than on FAS17 when released from 0 mm height (i.e. traditional dynamic hydrophobicity measurement). The order was reversed when providing the impact velocity. Comparison of energy dissipation during the impact process revealed that the droplet on ODS, because of its large deformation, loses more energy than that on FAS17. These results demonstrate that the order of droplet removal performance depends on the presence or absence of some initial velocity. (C) 2013 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
APPLIED SURFACE SCIENCE, 2014年02月, ［査読有り］

有機モノリス構造体の転落性の改善と、TiO2モノリス構造体の機能性評価　　　　　　　　　　　　　　　
酒井宗寿,林美緒,竹井寛子,勝又健一,中島 章
財団法人 神奈川科学技術アカデミー 有機系太陽電池評価プロジェクト研究概要集, 2014年

マイクロ波光誘電減衰測定法を用いた有機薄膜太陽電池における電気特性の評価　　　　　　　　　　　　　　　
酒井宗寿,竹井寛子,内藤恭兵,片山建二
財団法人 神奈川科学技術アカデミー 有機系太陽電池評価プロジェクト研究概要集, 2014年

動的なぬれ性評価方法と外部電場による水滴の制御 ～溶接技術への展開の可能性～　　　　　　　　　　　　　　　
酒井宗寿; 中島 章
ぶれいず, 2014年, ［査読有り］

有機薄膜太陽電池におけるキャリアライフタイムの空間分布評価法 ～マイクロ波光導電減衰法の適応方法の確立～　　　　　　　　　　　　　　　
酒井宗寿; 竹井寛子; 内藤恭兵; 中田一弥; 片山建二; 高木克彦; 藤嶋 昭
Electrochemistry, 2014年, ［査読有り］

Development of sol-gel processed semi-transparent and self-cleaning superhydrophobic coatings
Sanjay S. Latthe; Chiaki Terashima; Kazuya Nakata; Munetoshi Sakai; Akira Fujishima, Optically transparent, mechanically durable, and self-cleaning superhydrophobic coatings are greatly awaited for applications in daily life. An attempt has been made to develop sol-gel processed semi-transparent, durable and self-cleaning superhydrophobic coatings on glass using a silica-PMMA composite. A water drop acquires a near spherical shape on the coating exhibiting a water contact angle of similar to 159 degrees and immediately rolled off under small disturbance. A 10 mu l water drop could individually collect around 10 mg of dirt particles along the way whilst rolling off the coating surface. The superhydrophobicity of the coatings remained intact under the impact of a water jet. A water jet hits the superhydrophobic coating and was repelled straightaway off the surface, without leaving any trace of water. These coatings showed both strong superhydrophobicity and superoleophilicity. We observed an improvement in mechanical stability, as well as optical transparency of the coatings in the visible range after low loadings of PMMA polymer (2 vol%) in silica. The prepared coatings maintained excellent superhydrophobicity even after 6 months storage under normal conditions in air., ROYAL SOC CHEMISTRY
JOURNAL OF MATERIALS CHEMISTRY A, 2014年, ［査読有り］

Facile synthesis of transparent superhydrophobic titania coating by using soot as a nanoimprint template
Shanhu Liu; Munetoshi Sakai; Baoshun Liu; Chiaki Terashima; Kazuya Nakata; Akira Fujishima, This paper develops a robust method for the facile synthesis of transparent superhydrophobic TiO2 film by using the flame soot layer as a nanoimprint template. After the nanoimprint and calcination process, the TiO2 coating exhibited the inverse roughness structure of the soot layer with high transparent properties. And subsequent hydrophobic modification with 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS) rendered the transparent surfaces superhydrophobic (168 ± 4° for water). The transparency and superhydrophobicity of the TiO2 coating could be controlled by adjusting the initial concentration of the TiO2 suspension. The coating possesses excellent chemical stabilities and good mechanical resistance. Moreover, a superhydrophobic-superhydrophilic micropattern was further fabricated by illumination with ultraviolet light through a photomask. This fabrication process is expected to be extended to other transparent superhydrophobic coatings and to be used in many research fields. © 2013 The Royal Society of Chemistry.
RSC Advances, 2013年12月07日, ［査読有り］

Sliding of Water Droplets on Smooth Hydrophobic Silane Coatings with Regular Triangle Hydrophilic Regions
Akira Nakajima; Yosuke Nakagawa; Tsutomu Furuta; Munetoshi Sakai; Toshihiro Isobe; Sachiko Matsushita, The effect of the triangular pinning region on the sliding of water droplets on the smooth hydrophobic surface was investigated. Smooth hydrophobic silane coatings with various regular triangle hydrophilic regions were prepared using photolithography and octadecyltrimethoxysilane (ODS). The hydrophilic area in the surfaces was aligned hexagonally with a constant area fraction. Thereby water contact angles of the coatings were almost equivalent. The water droplet sliding velocity increased continuously with increasing pattern size. Anisotropic sliding velocity was observed on the surface, suggesting different pinning effects. The sliding motion of water droplets on the gradient surface with changing hydrophilic region size deflects against the downward direction. The deflection length depends on the direction of triangle hydrophilic regions and the initial sliding position. These results demonstrate that control of the sliding velocity while sustaining the static contact angle is feasible by designing the shape and alignment of chemical heterogeneity., AMER CHEMICAL SOC
LANGMUIR, 2013年07月, ［査読有り］

Factors Affecting UV-Induced Superhydrophilic Conversion of a TiO2 Surface
Alexei V. Emeline; Aida V. Rudakova; Munetoshi Sakai; Taketoshi Murakami; Akira Fujishima, The present study explored the effects of several factors (wetting, light intensity, spectral variation of the actinic light, heating, and surface acidity) on the hydrophilic conversion of the surface of TiO2 nanocoatings. The experimental dependencies of the efficiencies of photoinduced hydrophilic surface conversion on the intensity and wavelength of the actinic light clearly indicate the role of electronic photoexcitation in hydrophilic surface transformation. Particularly, the maximum extrema in spectral dependence of the efficiency of photoinduced hydrophilic conversion correspond to the energies of the first indirect and first direct electronic band-to-band transitions in TiO2. At the same time, temperature dependence and the effect of the surface acidity on the hydrophilic behavior of the TiO2 surface demonstrate the importance of the multilayer hydrate structure in both the original hydrophilicity of the surface and the direction of the photoinduced hydrophilic conversion. Estimation of the surface energy alteration under photoexcitation suggests that only specific surface sites (10(-3)-10(-4) monolayer) are responsible for the effect of photoinduced superhydrophilicity of a TiO2 surface., AMER CHEMICAL SOC
JOURNAL OF PHYSICAL CHEMISTRY C, 2013年06月, ［査読有り］

Preparation and Photocatalytic Activity of Robust Titania Monoliths for Water Remediation
Kazuya Nakata; Tomoya Kagawa; Munetoshi Sakai; Shanhu Liu; Tsuyoshi Ochiai; Hideki Sakai; Taketoshi Murakami; Masahiko Abe; Akira Fujishima, TiO2 monoliths were prepared, characterized, and evaluated for photocatalytic performance. The TiO2 monoliths were found to have an interconnected void lattice and a bimodal porous structure with macropores and mesopores after calcination at 500-700 degrees C. Monoliths calcined at 500 degrees C had high specific surface area (93.1 m(2)/g) and porosity (68%), which were maintained after calcination at 700-1100 degrees C (51-46%). The calcined monoliths had relatively high Vickers hardness (similar to 104) despite their porous structure. Monoliths calcined at 500 and 700 degrees C exhibited high performance because of their high specific surface area., AMER CHEMICAL SOC
ACS APPLIED MATERIALS & INTERFACES, 2013年02月, ［査読有り］

Spontaneous jumping of water droplet during dew condensation on the superhydrophobic coatings　　　　　　　　　　　　　　　
K. Yanagisawa; M. Sakai; T. Isobe; S. Matsushita; A. Nakajima
The 7th International Conference on the Science and Technology for Advanced Ceramics, Yokohama (Japan)., 2013年01月, ［査読有り］

酸化チタン光触媒と撥水性表面の組合せによる機能展開　　　　　　　　　　　　　　　
酒井宗寿,吉田直哉,勝又健一,中島 章
財団法人 神奈川科学技術アカデミー 重点研究室 光触媒グループ 研究概要集, 2013年

有機系太陽電池における電気特性評価と、TiO2多孔体の機能性評価　　　　　　　　　　　　　　　
酒井宗寿,竹井寛子
財団法人 神奈川科学技術アカデミー 平成24年度研究概要, 2013年

Effect of partial UV illumination on a mixture of water and a methylene blue solution in a microchannel coated with TiO2
Munetoshi Sakai; Yasushi Morii; Daito Kobayashi; Tsutomu Furuta; Toshihiro Isobe; Sachiko Matsushita; Akira Fujishima; Akira Nakajima, Effects of UV illumination on a mixture of water and a methylene blue (MB) solution in a TiO2-coated microchannel were investigated by changing the illuminated section. The TiO2 coating possessed photocatalytic activity. The mixing length of the liquids increased during UV illumination of an entire microchannel. However, the length became around 20% shorter than that before UV illumination when the UV illumination section was limited at the straight portion of the microchannel. The braking effect of liquid flow at the UV-dark border probably plays an important role in this phenomenon. (C) 2012 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
APPLIED SURFACE SCIENCE, 2013年01月, ［査読有り］

Visible-Light-Driven Photodegradation of Ace8aldehyde Gas Catalyzed by Aluminosilicate Nanotubes and Cu (II)-Grafted TiO
K. Katsumata; X. Hou; M. Sakai; A. Nakajima; A. Fujishima; N. Matsushita; K. J.D. MacKenziee; K. Okada, Aluminosilicate nanotubes and Cu(II)-grafted TiO2 composites were prepared, and the acetaldehyde degradation activity of the composites was evaluated at various relative humidities. The aluminosilicate nanotubes were synthesized hydrothermally and characterized by TEM, XRD, Al-27 and Si-29 NMR, FT-IR, N-2 and water vapor isotherms. Their morphology was nanotubular with 3-5 nm outer diameter, and the specific surface area was 245 m(2)/g. The aluminosilicate had a strong affinity for water molecules, and the structure was determined to be an imogolite by (27)AI and Si-29 NMR. TiO2 and imogolite composites exhibited higher activity for the photodegradation of acetaldehyde under UV irradiation than TiO2, but was dependent on the relative humidity. Cu(II)-grafted TiO2 and imogolite composites exhibited higher activity for the photodegradation of acetaldehyde under visible light irradiation than Cu(II)-grafted TiO2, and were less affected by the relative humidity. These results show that Cu(II)-grafted TiO2 - imogolite composites exhibit very efficient absorption and photodecomposition of acetaldehyde in a variety of environments. (C) 2013 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
Applied Catalysis B, 2013年, ［査読有り］

Facile synthesis of transparent superhydrophobic titania coating by using soot as a nanoimprint template
S. Liu; M. Sakai; B. Liu; C. Terashima; K. Nakata; A. Fujishima, This paper develops a robust method for the facile synthesis of transparent superhydrophobic TiO2 film by using the flame soot layer as a nanoimprint template. After the nanoimprint and calcination process, the TiO2 coating exhibited the inverse roughness structure of the soot layer with high transparent properties. And subsequent hydrophobic modification with 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS) rendered the transparent surfaces superhydrophobic (168 ± 4° for water). The transparency and superhydrophobicity of the TiO2 coating could be controlled by adjusting the initial concentration of the TiO2 suspension. The coating possesses excellent chemical stabilities and good mechanical resistance. Moreover, a superhydrophobic-superhydrophilic micropattern was further fabricated by illumination with ultraviolet light through a photomask. This fabrication process is expected to be extended to other transparent superhydrophobic coatings and to be used in many research fields. © 2013 The Royal Society of Chemistry.
RSC Advances, 2013年, ［査読有り］

Reduction of fluid friction on the surface coated with TiO2 photocatalyst under UV illumination
Munetoshi Sakai; Masaki Nishimura; Yasushi Morii; Tsutomu Furuta; Toshihiro Isobe; Akira Fujishima; Akira Nakajima, Fluid friction in a cylindrical glass pipe coated with TiO2 was investigated before and after UV illumination. The crystalline phase of TiO2 was anatase. Its coating thickness was about 90 nm. The frictional drag was evaluated by measuring the pressure loss in the pipe. Before UV illumination, the pressure loss changed gradually from a laminar flow to the turbulent one in the transition range, where the Reynolds number was around 3,300. However, the pressure loss after UV illumination maintained a laminar flow until the Reynolds number was 6,000. The reduction rate of the frictional drag increased concomitantly with increasing flow velocity. Particle image velocimetry analysis revealed that the fluid friction would be reduced by suppressing unstable flow around the wall of the glass pipe. These results imply that highly hydrophilic TiO2 surface effectively reduced fluid friction in a large Reynolds number range effectively, and that suitable surface wettability for the reduction of the fluid friction depends on the flow velocity., SPRINGER
JOURNAL OF MATERIALS SCIENCE, 2012年12月, ［査読有り］

High hydrophobic surface with metabolic system using organic monolithic structure　　　　　　　　　　　　　　　
M. Sakai; T. Kato; A. Nakajima; A. Fujishima
AVS, Tampa (USA)., 2012年11月, ［査読有り］

Repeatable Wettability Conversion between Hydrophobic and Superhydrophilic States on Nonwoven Fabrics Based on Electrospun TiO2-Poly(dimethylsiloxane) Fibers
Kazuya Nakata; Munetoshi Sakai; Baoshun Liu; Tsuyoshi Ochiai; Taketoshi Murakami; Akira Fujishima, Nonwoven fabrics based on composite fibers of TiO2 and poly(dimethylsiloxane) (PDMS) are prepared by electrospinning. Nonwoven fabrics based on TiO2-PDMS fibers are initially hydrophobic and undergo rapid wettability conversion to a superhydrophilic state upon plasma irradiation. Hydrophobicity is rapidly recovered under ambient conditions. This wettability conversion can be repeated by subsequent cycles of plasma irradiation and storage under ambient conditions., CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2012年07月, ［査読有り］

Bending motion of a polyacrylamide/graphite fiber driven by a wide range of light from UV to NIR
Kazuya Nakata; Munetoshi Sakai; Tsuyoshi Ochiai; Taketoshi Murakami; Akira Fujishima, Photomechanical motion of a polyacrylamide-based fiber containing graphite as a dye was observed upon illumination with a wide range of light from UV to NIR wavelength. The fiber bends upon illumination, and then recovers its original shape when illumination ceases. The fiber is heated upon illumination because of a photothermal effect originating from graphite, and then cools to room temperature once the light source is removed. The mechanical force of the bending motion upon illumination was approximately 2.2 mN in the direction perpendicular to the fiber. When the light source was turned off, the bending force disappeared. Generation and disappearance of this mechanical force can be cycled by turning the light source on and off, respectively. (C) 2012 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
MATERIALS LETTERS, 2012年05月, ［査読有り］

Electroless Deposition of Metal Micropatterns Using Ink-jetted ZnO Thin Films as Templates
Hiroki Kono; Munetoshi Sakai; Xintong Zhang; Hajime Yoshiki; Kazuya Nakata; Taketoshi Murakami; Hideki Sakai; Masahiko Abe; Akira Fujishima, Metal (Cu and Ni) micropatterns were electrolessly fabricated on glass substrates using ink-jetted ZnO thin films as templates and without employing photoirradiation. The metal micropatterns conformed to the ZnO templates and had line widths as narrow as 45 mu m. The line width depended on the wettability of the glass substrate and on the viscosity of the precursor solution of zinc nitrate and poly(vinylpyrrolidone)., CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2012年05月, ［査読有り］

Theoretical Kinetic Analysis of Heterogeneous Photocatalysis by TiO2 Nanotube Arrays: the Effects of Nanotube Geometry on Photocatalytic Activity
Baoshun Liu; Kazuya Nakata; Shanhu Liu; Munetoshi Sakai; Tsuyoshi Ochiai; Taketoshi Murakami; Katsuhiko Takagi; Akira Fujishima, TiO2 nanotube arrays are important functional materials in photocatalysis. Compared with other TiO2 materials, the geometrical parameters of the nanotubes in an array significantly affect photocatalytic activity, but how they do this remains unclear. In the present work, a simple theoretical kinetic model to study the effects of nanotube diameter, wall thickness, and length on the photocatalytic activity of TiO2 nanotube arrays is developed, in which reactant (O-2) transport is considered. The photocatalytic activity first increases and then decreases as the diameter and wall thickness of the nanotubes increase because of changes in light absorption, surface area, and reactant transport. The photocatalytic activity increases, and then reaches saturation as the nanotube length increases, which is mainly influenced by the change flight absorption along the nanotube. The present kinetic model agrees well with experimental results and clearly explains the photocatalytic activity of TiO2 nanotubes, helping us to understand nanotube photocatalysis., AMER CHEMICAL SOC
JOURNAL OF PHYSICAL CHEMISTRY C, 2012年04月, ［査読有り］

Fabrication and characterization of self-organized porous TiO2 particle layers
Kazuya Nakata; Munetoshi Sakai; Tsuyoshi Ochiai; Taketoshi Murakami; Katsuhiko Takagi; Akira Fujishima, Self-organized porous TiO2 particle layers were fabricated by simple calcination of a Ti substrate in air. The TiO2 particle layers were formed by calcination at 800 degrees C for 24 h or 900 degrees C for 1 h. Calcination at 900 degrees C for more than 6 h, or at more than 1000 degrees C for more than 20 min, gives not only the formation of TiO2 particle layers, but also spontaneous delamination of the TiO2 particle layers from the substrate on cooling to room temperature. The crystal phase of the TiO2 particle layers is rutile. Cross-section scanning electron microscopy (SEM) images revealed that the TiO2 particle layers after spontaneous delamination have porous structure between the TiO2 particle layers. The thicknesses of the TiO2 layers increase with increasing calcination temperature and time. The sizes of the TiO2 particles depend on the calcination temperature and time. (C) 2011 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
MATERIALS LETTERS, 2012年03月, ［査読有り］

有機モノリス構造体を用いた新陳代謝機能を有する高撥水性表面　　　　　　　　　　　　　　　
酒井宗寿,中島 章
財団法人 神奈川科学技術アカデミー 平成23年度研究概要, 2012年

有機系太陽電池における電気特性の評価　　　　　　　　　　　　　　　
酒井宗寿,内藤恭兵,片山建二
財団法人 神奈川科学技術アカデミー 平成23年度研究概要, 2012年

酸化チタン添加高度撥水材料の開発，光触媒　　　　　　　　　　　　　　　
中島 章,酒井宗寿
光触媒, 2012年

Hierarchical TiO2 spherical nanostructures with tunable pore size, pore volume, and specific surface area: facile preparation and high-photocatalytic performance
Baoshun Liu; Kazuya Nakata; Munetoshi Sakai; Hidenori Saito; Tsuyoshi Ochiai; Taketoshi Murakami; Katsuhiko Takagi; Akira Fujishima, Anatase TiO2 hierarchical nanostructural microspheres with tunable pore size, pore volume, and specific surface area were prepared by a facile two-step method of electrospray and hydrothermal treatment. Compared to the calcination, the hydrothermal treatment can transfer the electrosprayed TiO2 microspheres to porous hierarchical nanostructures. Adding ammonia in the hydrothermal process has a great effect on the pore structure of TiO2 microspheres. The hydrothermal-treated samples with >2.0 ml ammonia being added are composed of both big and small nanocrystals. Some of the large nanocrystals grow in the [001] direction and contain step-like {101} surfaces. The large nanoparticles are formed through the combination of small particles by dehydration, which finally leads to the change of TiO2 microspheres from mesoporous to large-porous structure. The effects of the specific surface area, the pore volume, and the pore size on the photocatalytic activity are studied. It is considered that the pores on the surface layer of TiO2 microspheres are like a door that can control the diffusion of reactants between the outside and the inside. If the size of pores on the surface is big enough to allow the fast diffusion of reactants, the photocatalytic activity will increase with the increase of specific surface area and pore volume. In addition, further calcination on the TiO2 spheres after hydrothermal treatment can increase the photocatalytic activity, which is better than the commercial P25., ROYAL SOC CHEMISTRY
CATALYSIS SCIENCE & TECHNOLOGY, 2012年, ［査読有り］

Photomechanical Energy Conversion of Photoresponsive Fibers Exhibiting Bending Behavior
K. Nakata; Y. Ishikawa; M. Sakai; BS. Liu; T. Ochiai; H. Sakai; T. Murakami; M. Abe; A. Fujishima, Photoresponsive fibers based on poly(acrylamide) (PAA) with methylene blue (MB) dye were prepared. All semicircular fibers show bending towards the direction of the flat surface of the fiber when illuminated. The fibers recover their initial shape when the illumination stops. The fiber is heated upon illumination and cooled to room temperature once the illumination is stopped. The fiber also is sensitive to humidity, showing bending behavior towards the direction of the flat surface of the fiber upon changing the humidity. The mechanical energy of the PAA/MB fiber is approximately 0.6 mN for the bending direction when it is illuminated. A possible mechanism for the bending behavior is as follow: (1) the fiber is heated upon illumination because of the photothermal effect, (2) the fiber loses water molecules, (3) the fiber shrinks; bending towards the direction of the flat surface of the fiber occurs because of a difference in the shrinkage for the flat surface and the other side of the fiber. Finally, we demonstrated that a PP ball (1.5 mg) can be moved by the mechanical energy produced by the changing shape of the fiber upon illumination., HINDAWI PUBLISHING CORPORATION
International Journal of Photoenergy, 2012年, ［査読有り］

Wetting Mode Transition of Water Droplets by Electrowetting on Highly Hydrophobic Surfaces Coated with Two Different Silanes
Tsutomu Furuta; Munetoshi Sakai; Toshihiro Isobe; Sachiko Matsushita; Akira Nakajima, Highly hydrophobic surfaces with nanoscale roughness were prepared by coating two fluoroalkylsilanes (FAS17 and FAS3) respectively onto boehmite deposition layers. The droplet shape change on the surface was then observed with application of voltage between the droplet and the coating surfaces. The wetting mode transition on FAS3 coating advanced continuously once the applied voltage exceeded 120 V, whereas that on FAS17 coating at less than 200 V. The droplet shape changed with sustaining air phase at the solid-liquid interface., CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2012年01月, ［査読有り］

Wetting mode transition of nanoliter scale water droplets during evaporation on superhydrophobic surfaces with random roughness structure
Tsutomu Furuta; Toshihiro Isobe; Munetoshi Sakai; Sachiko Matsushita; Akira Nakajima, During evaporation, shape changes of nanoliter-scale (80-100 nL) water droplets were evaluated on two superhydrophobic surfaces with different random roughness (nm-coating, mu m-coating). The square of the contact radius and the square of the droplet height decreased linearly with evaporation time. However, trend changes were observed at around 170 s (nm-coating) and around 150 s (mu m-coating) suggesting a wetting mode transition. The calculated droplet radii for the wetting mode transition from the average roughness distance and the average roughness height of these surface structures were approximately equal to the experimental values at these trend changes. A certain level of correlation between the roughness size and droplet radius at the wetting mode transition was confirmed on surfaces with random roughness. (C) 2011 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
APPLIED SURFACE SCIENCE, 2012年01月, ［査読有り］

Photo-induced Hydrophilicity of TiO2 Thin Films Prepared by Using Water-Soluble Titanium Complexes　　　　　　　　　　　　　　　
K. Katsumata; Y. Ohno; K. Tomita; M. Kakihana; M. Sakai; A. Nakajima; N. Matsushita; A. Fujishima; K. Okada
15th International Conference on Thin Films, Kyoto (Japan)., 2011年11月, ［査読有り］

Development of Analysis System for Evaluating Carrier Lifetime in Organic Thin Film Solar Cell　　　　　　　　　　　　　　　
K. Naito; M. Sakai; H. Takei; K. Nakata; K. Katayama; K. Takagi; A. Fujishima
AVS, Nashville (USA)., 2011年11月, ［査読有り］

Carrier Life Time of Several Organic Photovaltanic Cells by using Micro Wave Photoconductive Decay　　　　　　　　　　　　　　　
M. Sakai; K. Naito; H. Takei; K. Nakata; K. Katayama; K. Takagi; A. Fujishima
AVS, Nashville (USA)., 2011年11月, ［査読有り］

Evaluation Approach of Several Organic Photovoltaic Cells by Using Micro Wave Photoconductive Decay　　　　　　　　　　　　　　　
M. Sakai; K. Naito; H. Takei; K. Nakata; K. Katayama; K. Takagi; A. Fujishima
PVSEC-21, Fukuoka (Japan)., 2011年11月, ［査読有り］

Visible Light Responsive Electrospun TiO2 Fibers Embedded with WO3 Nanoparticles
Kazuya Nakata; Baoshun Liu; Yuri Goto; Tsuyoshi Ochiai; Munetoshi Sakai; Hideki Sakai; Taketoshi Murakami; Masahiko Abe; Akira Fujishima, TiO2-WO3 composite fibers were prepared by electrospinning. The fibers have an average diameter of 1.0 mu m. The XRD pattern of the TiO2-WO3 composite fibers indicates the presence of anatase and rutile phases of TiO2 and an orthorhombic phase of WO3. The photocatalytic degradation of acetaldehyde under visible light was achieved with the TiO2-WO3 composite fibers., CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2011年10月, ［査読有り］

Fabrication and Photocatalytic Properties of TiO2 Nanotube Arrays Modified with Phosphate
Kazuya Nakata; Baoshun Liu; Yosuke Ishikawa; Munetoshi Sakai; Hidenori Saito; Tsuyoshi Ochiai; Hideki Sakai; Taketoshi Murakami; Masahiko Abe; Katsuhiko Takagi; Akira Fujishima, We have prepared TiO2 nanotubes by anodization in HF or HF/H3PO4 mixed electrolyte. The morphologies and photocatalytic properties of the nanotubes were changed by electrolytes. The nanotubes prepared in HF/H3PO4 mixed electrolyte showed higher performance to decompose acetaldehyde by photocatalysis than those prepared in pure HF., CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2011年10月, ［査読有り］

Preparation of TiO2 Thin Films Using Water-soluble Titanium Complexes and Their Photoinduced Properties
Ken-ichi Katsumata; Yukiaki Ohno; Koji Tomita; Munetoshi Sakai; Akira Nakajima; Masato Kakihana; Akira Fujishima; Nobuhiro Matsushita; Kiyoshi Okada, Titanium dioxide thin films were prepared by using four water-soluble titanium complexes of titanium-lactate, tartalate, malate and salicylate complex solutions. The crystalline phases detected in the films were anatase. The surface microstructures of the four film samples were different in their grain sizes. Photocatalytic decomposition activity of the four films was almost the same, but their photoinduced hydrophilicities were different. The film prepared using titanium-salicylate complex exhibited lower hydrophilic conversion rate than the other films. Grain size and stress yielded to the film are considered to be important factors on the photoinduced hydrophilicity., WILEY-BLACKWELL
PHOTOCHEMISTRY AND PHOTOBIOLOGY, 2011年09月, ［査読有り］

Synthesis and Photocatalytic Activity of TiO2-Imogolite/Allophane Composites　　　　　　　　　　　　　　　
X. Hou; K. Katsumata; M. Sakai; A. Nakajima; A. Fujishima; N. Matsushita; K. Okada
PacRim9, Cairns (Australia)., 2011年07月, ［査読有り］

Preparation and Photocatalytic Activity of Rutile Nanotube　　　　　　　　　　　　　　　
Y. Komatsubara; K. Katsumata; M. Sakai; A. Nakajima; A. Fujishima; N. Matsushita; K. Okada
PacRim9, Cairns (Australia)., 2011年07月, ［査読有り］

Sliding Behavior of Water Droplets on the Hydrophobic Surfaces with Various Hydrophilic Patterns　　　　　　　　　　　　　　　
T. Furuta; M. Sakai; T. Isobe; S. Matsushita; A. Nakajima
PacRim9, Cairns (Australia)., 2011年07月, ［査読有り］

Mesoporous TiO2 Core-Shell Spheres Composed of Nanocrystals with Exposed High-Energy Facets: Facile Synthesis and Formation Mechanism
Baoshun Liu; Kazuya Nakata; Munetoshi Sakai; Hidenori Saito; Tsuyoshi Ochiai; Taketoshi Murakami; Katsuhiko Takagi; Akira Fujishima, A facile new method that combines electrospray and hydrothermal treatment is used to prepare mesoporous core-shell TiO2 spheres with high specific surface areas and high pore volumes. Interestingly, the resulting TiO2 spheres are composed of anatase TiO2 nanocrystals with exposed step-like {001} and smooth {010} facets. The percentage of exposed {001} facets can be adjusted by changing the experimental parameters used in the electrospray and hydrothermal treatment processes, such as the contents of poly(N-vinyl-2-pyrrolidone) and acetic acid. The combination of high specific surface area (> 100 m(2) g(-1)), high pore volume (>0.30 cm(3) g(-1)), useful pore size (10-15 nm), spherical core-shell structure, and exposed high energy facets makes these TiO2 spheres an important candidate for use in many photoelectrochemical applications. The formation mechanism of the mesoporous TiO2 spheres is also studied. The great advantage of this method is that interesting and complicated mesoporous superstructures can be prepared using electrospray technology., AMER CHEMICAL SOC
LANGMUIR, 2011年07月, ［査読有り］

Sliding of Water Droplets on Hydrophobic Surfaces with Various Hydrophilic Region Sizes
Tsutomu Furuta; Munetoshi Sakai; Toshihiro Isobe; Sachiko Matsushita; Akira Nakajima, Four patterned surfaces with hydrophilic areas of different sizes were prepared using photolithography with a smooth octadecyltrimethoxysilane (ODS) hydrophobic coating. The hydrophilic area in the surfaces was aligned hexagonally with a constant area fraction. The sliding angle and contact angle hysteresis of the water droplets increased concomitantly with increasing pattern size. The increase of the contact line distortion between defects at the receding side plays an important role in this trend. The droplet sliding velocity also increased concomitantly with increasing pattern size. This trend was simulated by a simple flow model. The contribution of the interface between the ODS region and the hydrophilic area was deduced from this trend. This study demonstrated the different size dependency of the chemical surface defects for sliding behavior between the critical moment at which a droplet slides down and the period when a droplet is sliding., AMER CHEMICAL SOC
LANGMUIR, 2011年06月, ［査読有り］

Control of wetting on Ti-based bulk metallic glass surfaces by a hydrothermal method
Ken-ichi Katsumata; Takeshi Wada; Akihisa Inoue; Munetoshi Sakai; Akira Nakajima; Akira Fujishima; Nobuhiro Matsushita; Kiyoshi Okada, The surfaces of the Ti-based bulk metallic glasses (Ti(50)Ni(20)Cu(25)Sn(5)) were modified by a hydrothermal method using sodium hydroxide (NaOH) solution, and the surface wettability was investigated. No reflections were observed in the XRD patterns of the NaOH-treated samples even though there was a clear change of the color, indicating formation of amorphous oxide phases. The Raman spectra showed peaks attributed to sodium titanate compounds (Na-O-Ti) and titanium oxide. Some of the samples were observed to have a very rough surface microstructure such as a "house-of-cards" or leaf-like structure. The water contact angle of the treated samples decreased with increasing treatment temperature and time. These results indicate that the wettability of the sample surface was able to be controlled from hydrophobic to hydrophilic by changing the conditions of the hydrothermal treatment., SPRINGER
JOURNAL OF MATERIALS SCIENCE, 2011年05月, ［査読有り］

Antireflection and Self-Cleaning Properties of a Moth-Eye-Like Surface Coated with TiO2 Particles
Kazuya Nakata; Munetoshi Sakai; Tsuyoshi Ochiai; Taketoshi Murakami; Katsuhiko Takagi; Akira Fujishima, Poly(ethylene terephthalate) (PET) films with a moth-eye-like surface are coated with TiO2 particles to form self-cleaning antireflective films. The use of a TiO2 suspension of high concentration to coat the PET surface produces a thicker TiO2 layer with smaller pores, whereas a low concentration of a TiO2 suspension gives a thinner layer of TiO2 with larger pores. The PET films coated with TiO2 particles exhibit a high transmittance of 76-95% and almost no absorption in the range of 400-800 nm. The PET films coated with a TiO2 suspension with a concentration of >= 2 vol % exhibit superhydrophilicity after irradiation with UV light. After irradiation, the superhydrophilic nature is retained for at least 18 days. The TiO2-coated PET films showed the ability to decompose methylene blue under UV irradiation., AMER CHEMICAL SOC
LANGMUIR, 2011年04月, ［査読有り］

有機系太陽電池における電気特性の評価　　　　　　　　　　　　　　　
酒井宗寿,内藤恭兵,片山建二
財団法人 神奈川科学技術アカデミー 平成22年度研究概要, 2011年

二酸化チタン光触媒の流動抵抗低減効果と、滑水性無機酸化物表面の濡れ性　　　　　　　　　　　　　　　
酒井宗寿,吉田直哉,中島 章
財団法人 神奈川科学技術アカデミー 平成22年度研究概要, 2011年

Photocatalytic Activity and Related Surface Properties of Transparent ZnO Films Prepared by a Low-temperature　　　　　　　　　　　　　　　
H. Wagata; K. Katsumata; N. Ohashi; M. Sakai; A. Nakajima; A. Fujishima; K. Okada; N. Matsushita
Photochemistry and Photobiology, 2011年, ［査読有り］

Anisotropic photomechanical motion of semicircular-shaped microfibers that contain dyes
Kazuya Nakata; Yosuke Ishikawa; Munetoshi Sakai; Tsuyoshi Ochiai; Baoshun Liu; Hideki Sakai; Taketoshi Murakami; Masahiko Abe; Akira Fujishima, We prepared polyacrylamide-based fibers containing the dyes Methylene Blue or Acid Red 52 and observed their photomechanical motion upon light illumination. The fibers bend upon the application of photoillumination. The fibers recover their original shapes when photoillumination ends. The fibers bend anisotropically in a specific direction. The absorption properties and photobending behavior of the fibers are related. ©2011 The Chemical Society of Japan.
Chemistry Letters, 2011年, ［査読有り］

Reduction of Friction Drag on the Solid Surface with Various Wettability　　　　　　　　　　　　　　　
M. Sakai; A. Nakajima
6rd International Congress on Ceramics, Osaka (Japan)., 2010年11月, ［査読有り］, ［招待有り］

Development of Boundary Layer in the Flowing Water on the Solid Surface with Various Wettability　　　　　　　　　　　　　　　
M. Sakai; M. Nishimura; T. Furuta; A. Nakajima; A. Fujishima
AVS, Albuquerque (USA)., 2010年10月, ［査読有り］

Freezing Behavior of a Water Droplet on a Rough Hydrophobic Surface Coated with a Short-chained Fluoroalkylsilane
Tsutomu Furuta; Munetoshi Sakai; Toshihiro Isobe; Akira Nakajima, A highly hydrophobic surface with nanoscale roughness was prepared by coating with a short-chained fluoroalkylsilane The freezing behavior of a water droplet on the surface was then investigated Freezing initiated in the vicinity of the three-phase contact line, producing a sharpened onion-like top on the droplet. The result of the freezing ratio at each time and the volume ratio at each height demonstrates the possibility that freezing advanced linearly in a vertical direction, CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2010年10月, ［査読有り］

UV/Thermally Driven Rewritable Wettability Patterns on TiO2−PDMS Composite Films
K. Nakata; H. Kimura; M. Sakai; T. Ochiai; H. Sakai; T. Murakami; M. Abe; A. Fujishima, Composite films of TiO2 and polydimethylsiloxane (PDMS) are prepared by a sol-gel method, cured with UV irradiation, and then treated in hot water to crystallize the TiO2 in the film. The presence of anatase TiO2 contributes to the photoinduced superhydrophilicity of the film under UV irradiation. Contact angle studies reveal that the TiO2-PDMS composite film recovers its original hydrophobic state. Hydrophobic-superhydrophilic patterns are successfully formed on the films. The wettability patterns can be erased by UV irradiation and thermal treatment. New wettability patterns can be reconstructed, demonstrating that the film exhibits rewritable wettability without the need for organic chemicals., AMER CHEMICAL SOC
ACS Applied Materials & Interfaces, 2010年09月, ［査読有り］

Effect of Dew Condensation on the Wettability of Rough Hydrophobic Surfaces Coated with Two Different Silanes
Tsutomu Furuta; Munetoshi Sakai; Toshihiro Isobe; Akira Nakajima, Dew condensation effects on the wettability of rough and smooth coatings of two fluoroalkylsilanes (FAS3 and FAS17) were investigated by controlling the temperature. Contact angles of the coatings decreased concomitantly with decreasing surface temperature. Inflection points in the temperature dependence of contact angles were observed at the dew point. They were attributable to the change of the interfacial free energy of the solid gas interface by water adsorption. The contact angle decrease suggested a mode transition from Cassie to Wenzel on the rough surface, and resulted from the surface wettability change and the increase of the condensation amount of water. The contact angle change by increasing temperature from -6 degrees C revealed that the Wenzel mode is more stable than Cassie's mode., AMER CHEMICAL SOC
LANGMUIR, 2010年08月, ［査読有り］

Surface Modification on the Bulk Metallic Glass by Hydrothermal Method　　　　　　　　　　　　　　　
K. Katsumata; T. Wada; A. Inoue; M. Sakai; A. Nakajima; A. Fujishima; N. Matsushita; K. Okada
STAC-4, Yokohama (Japan)., 2010年06月, ［査読有り］

Removing an Air Layer from a Superhydrophobic Surface in Flowing Water
Munetoshi Sakai; Akira Nakajima; Akira Fujishima, The removal of a surface air layer from a superhydrophobic coating in flowing water was evaluated using a laser beam and a high-speed camera. It proceeded via three steps: (1) removal of the top unstable air layer, (2) retention of air in the bottom of the surface microstructure, and (3) replacement of air in the microstructure with water. Different flow velocities result in different removal rates of the surface air layer., CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2010年05月, ［査読有り］

Characteristics of microbubbles generated by porous mullite ceramics prepared by an extrusion method using organic fibers as the pore former
Kiyoshi Okada; Mai Shimizu; Toshihiro Isobe; Yoshikazu Kameshima; Munetoshi Sakai; Akira Nakajima; Taisuke Kurata, Porous mullite ceramics with unidirectionally oriented pores were prepared by an extrusion method using rayon fibers as the pore formers and the characteristics of microbubbles generated by these porous ceramics were investigated. The 1200 mm long ceramics were tubular and of thick or thin types of 20-30 mm inner diameter and 30-50 mm outer diameter, respectively. The thin and thick samples had porosities of 47 and 49% and average pore radii of 7.8 mu m. The gas permeabilities of the thick and thin samples were 4.1 X 10(-14) and 5.4 x 10(-14) m(2), respectively. Microbubbles were generated by introducing N(2) gas through the ceramic tube by immersing it into water. The minimum pressure (bubble point pressure) for generation of microbubbles was 20 kPa, much lower than for other bubble-forming methods. The average microbubble radii ranged from about 70 to 105 mu m at flow rates of 0.15-0.25 L/min in the thin sample and 0.3-0.7 L/min in the thick sample. These bubble sizes are much smaller than calculated for a Fritz-type bubble such as generally formed by bubbling from pores and/or orifices. However, the present bubble sizes agree well with the calculated value based on nanobubbles, indicating that bubble formation occurs by mixing the gas with water in small pores. Since microbubbles enhance the dissolution rate of a gas phase in water, they are potentially useful for improving water environments, especially oxygen-deficient water. The effectiveness of gas dissolution in water was confirmed by determining the dissolution behavior Of CO(2) gas using these porous ceramics. (C) 2009 Elsevier Ltd. All rights reserved., ELSEVIER SCI LTD
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2010年04月, ［査読有り］

Water Droplets' Internal Fluidity during Horizontal Motion on a Superhydrophobic Surface with an External Electric Field
Munetoshi Sakai; Hiroki Kono; Akira Nakajima; Hideki Sakai; Masahiko Abe; Akira Fujishima, On a superhydrophobic surface, the internal fluidity of water droplets with different volumes (15, 30 mu L) and their horizontal motion in an external electric field were evaluated using particle image velocimetry (PIV). For driving of water droplets oil it superhydrophobic coating between parallel electrodes, it was important to place them at appropriate positions. Droplets moved with slipping. Small droplets showed deformation that is more remarkable. Results show that the dielectrophoretic force induced the initial droplet motion and that the surface potential gradient drove the droplets after reaching the middle point between electrodes., AMER CHEMICAL SOC
LANGMUIR, 2010年02月, ［査読有り］

Control of Wetting on Ti-based Bulk Metallic Glass Surface　　　　　　　　　　　　　　　
K. Katsumata; T. Wada; A. Inoue; M. Sakai; A. Fujishima; N. Matsushita; K. Okada
BMMP-10, Nagoya (Japan)., 2010年01月, ［査読有り］

大学・研究所めぐり 財団法人 神奈川科学技術アカデミー(KAST) 色材サロン
酒井宗寿,中島 章,村上武利, 色材協会
色材協会誌, 2010年, ［招待有り］

ZnOナノロッドによる超撥水性薄膜の構造制御と動的な濡れ性の評価　　　　　　　　　　　　　　　
酒井宗寿,中島 章
財団法人 神奈川科学技術アカデミー 平成21年度研究概要, 2010年

酸化チタンの光誘起親水性による流動抵抗の低減　　　　　　　　　　　　　　　
中島 章,西村正輝,酒井宗寿
光触媒, 2010年, ［査読有り］

超撥水表面上における流体挙動：水滴の転落と水流下での空気層の剥離　　　　　　　　　　　　　　　
酒井宗寿; 中島 章
色材協会誌, 2010年, ［査読有り］

Sliding Behavior of Water Droplets on Smooth Hydrophobic Fluoroalkylsilane Coatings with Different Surface Coverage Ratio
S. Suzuki; M. Sakai; N. Yoshida; A. Hashimoto; Y. Kameshima; K. Okada; A.Nakajima, 傾斜した撥水表面上での水滴の転落性能は，輸送機械分野を中心にその重要性が高まっている。この性質は固体表面内の均質性が重要であることが指摘されているが，均質性の中で，組成と物理的な粗さが，水滴の転落挙動に及ぼす影響が区別されていない。本研究ではフルオロアルキルシランを用い，蒸着時間を制御して，表面粗さ（R_a）を0.2 nm以下に維持したまま被覆率の異なるさまざまな自己組織化薄膜をシリコン基板上に作製した。そしてその表面上で水滴を転落させ，粒子画像流速解析により水滴の内部流動を可視化して転落挙動を調査した。その結果，水滴の転落加速度は，シランの表面被覆率の低下とともに低下したが，転落時の滑り／回転の比率はほとんど変化しないことが明らかになった。この傾向は，同一材料で表面に物理的な粗さ（R_a＝3.1 nm）をともなうものとは異なり，組成と物理的な粗さが，水滴の転落挙動への及ぼす影響は異なる可能性があることが示された。, Japan Society of Colour Material
Journal of the Japan Society of Colour Material, 2010年, ［査読有り］

Antibacterial Activity of Hydrophobic Composite Materials containing a Visible Light Sensitive Photocatalyst
K Yamauchi; Y. Yao; T. Ochiai; M. Sakai; Y. Kubota; G. Yamauchi, The conventional superhydrophobic surface offered by PTFE provides no sterilization performance and is not sufficiently repellent against organic liquids. These limit PTFE's application in the field of disinfection and result a lack of durability. N-doped TiO 2 photocatalyst added PTFE composite material was developed to remedy these shortcomings. This paper reports the surface characteristics, and the bactericidal and self-cleaning performance of the newly-developed composite material. The material exhibited a contact angle exceeding 150 degrees consistent with its hydrophobicity despite the inclusion of the hydrophilic N-doped TiO 2. The surface free energy obtained for this composite was 5.8mN/m. Even when exposed to a weak fluorescent light intensity (100 lx) for 24 hours, the viable cells of gram-negative E. coli on the 12% N-doped TiO 2-PTFE film were reduced 5 logs. The higher bactericidal activity was also confirmed on the gram-positive MRSA. Compared with the N-doped TiO 2 coating only, the inactivation rate of the composite material was significantly enhanced. Utilizing the N-doped TiO 2 with the PTFE composite coating could successfully remove, by UV illumination, oleic acid adsorbed on its surface. These results demonstrate the potential applicability of the novel N-doped TiO 2 photocatalyst hydrophobic composite material for both indoor antibacterial action and outdoor contamination prevention. Copyright © 2011 Kentaro Yamauchi et al.
Journal of Nanotechnology, 2010年, ［査読有り］

Sliding of Water Droplets on the Superhydrophobic Surface with ZnO Nanorods
Munetoshi Sakai; Hiroki Kono; Akira Nakajima; Xintong Zhang; Hideki Sakai; Masahiko Abe; Akira Fujishima, In this study, we prepared various superhydrophobic surfaces using ZnO nanorod arrays (ZnO-NR) of different diameters. The contact angle was equivalent to the calculated value if it is assuming that the topmost surface of the rods is a solid-liquid contact area. Oil the superhydrophobic ZnO-NR surfaces, the 5 mu L water droplets slid down by constant acceleration motion. Sliding acceleration was governed by the solid area fraction. The resistance force of the actual measurement was consistent with that calculated using the model., AMER CHEMICAL SOC
LANGMUIR, 2009年12月, ［査読有り］

Dynamic Solid-liquid Interaction on Hydrophilic Surfaces　　　　　　　　　　　　　　　
Y. Yokota; N. Yoshida; M. Sakai; A. Nakajima; T. Watanabe
AVS, San Jose (USA)., 2009年11月, ［査読有り］

Dynamic Solid-liquid Interaction on Hydrophobic Surfaces　　　　　　　　　　　　　　　
N. Yoshida; M. Sakai; A. Nakajima; T. Watanabe
AVS, San Jose (USA)., 2009年11月, ［査読有り］

Evaporation and Sliding of Water Droplets on Hydrophobic Coatings with Nanoscale Roughness　　　　　　　　　　　　　　　
T. Furuta; A. Nakajima; M. Sakai; T. Isobe; Y. Kameshima; K. Okada
AVS, San Jose (USA)., 2009年11月, ［査読有り］

Reduction of Friction Drag by Superhydrophobic/ Superhydrophilic Coatings　　　　　　　　　　　　　　　
M. Sakai; M. Nishimura; T. Furuta; A. Nakajima; A. Fujishima
AVS, San Jose (USA)., 2009年11月, ［査読有り］

Droplet Size Dependence of Line Tension for an Ionic Liquid on a Smooth Silane Coating
Tsutomu Furuta; Akira Nakajima; Munetoshi Sakai; Toshihiro Isobe; Yoshikazu Kameshima; Kiyoshi Okada, Line tension was measured for microliter-scale and subnanoliter-scale droplets of an ionic liquid on a highly smooth and homogeneous fluoroalkylsilane coating. Values for microliter-scale droplets were two orders larger than those for subnanoliter-scale droplets despite their identical combinations of solid surfaces and liquid. Scale factors related to this measurement and hydrostatic pressure from the liquid play an important role in the discrepancy., CHEMICAL SOC JAPAN
CHEMISTRY LETTERS, 2009年06月, ［査読有り］

Evaporation and Sliding of Water Droplets on Fluoroalkylsilane Coatings with Nanoscale Roughness
Tsutomu Furuta; Akira Nakajima; Munetoshi Sakai; Toshihiro Isobe; Yoshikazu Kameshima; Kiyoshi Okada, Evaporation and sliding behaviors of water droplets were investigated on smooth and rough fluoroalkylsilane coatings. The rough coating possesses nanoscale roughness and chemical heterogeneity on its surface. Evaporation behaviors for these two coatings differed when nanoliter-scale droplets were used, although they were nearly identical for rnicroliter-scale droplets. The droplets on the smooth coating exhibit greater sliding acceleration and a larger slipping velocity ratio than those on the rough coating. Both the evaporation behavior of nanoliter-scale droplets and sliding velocity of microliter-scale droplets were affected by nanoscale surface heterogeneity. They are indicators for highly homogeneous smooth silane coatings., AMER CHEMICAL SOC
LANGMUIR, 2009年05月, ［査読有り］

超撥水性表面上の液滴の運動メカニズムの解明とその応用　　　　　　　　　　　　　　　
酒井宗寿,河野広希,張昕彤,中島 章
財団法人 神奈川科学技術アカデミー 平成20年度研究概要, 2009年

ZnOナノロッドによる超撥水性薄膜の構造制御と動的な濡れ性の評価　　　　　　　　　　　　　　　
河野広希,酒井宗寿,張昕彤,中島 章
財団法人 神奈川科学技術アカデミー 平成20年度研究概要, 2009年

液滴転落挙動解析システムの開発 【平成21年度色材協会賞（技術賞）選考報告】　　　　　　　　　　　　　　　
酒井宗寿,橋本綾子,吉田直哉,亀島欣一,鈴木俊介,中島 章,福山紅陽
色材協会誌, 2009年, ［招待有り］

Mass Dependence of Slipping/ Rolling Ratio in Sliding Acceleration of Water Droplets on a Smooth Fluoroalkylsilane Coating”, Journal of the Japan Society of Colour Material, 82, 1, p3-8. (2009)　　　　　　　　　　　　　　　
S. Suzuki; A. Nakajima; Y. Sakurada; M. Sakai; N. Yoshida; A. Hashimoto; Y. Kameshima; K. Okada
Journal of the Japan Society of Colour Material, 2009年, ［査読有り］

Effect of Surface Structure on the Sustainability of Air Layer on Superhydrophobic Coatings in Water-Ethanol Mixture”, Langmuir, 25, 1, p13-16. (2009)
M. Sakai; T. Yanagisawa; A. Nakajima; Y. Kameshima; K. Okada, Using a laser beam and its reflection, we evaluated surface air layers on two superhydrophobic coatings with different roughnesses (R(a) = 1900 and 74 nm) in a water-ethanol mixture. The reflected laser intensity decreased by increasing the ethanol concentration for the superhydrophobic coating with large roughness because of increased scattering by the surface structure of the solid. However, it was almost constant and slightly increased for the coating with small roughness, probably because the liquid-air interface becomes flatter as the liquid intrudes into the surface structure. Results demonstrated that the difference in surface structure provides different sustainability of the surface air layer., AMER CHEMICAL SOC
Langmuir, 2009年, ［査読有り］

Preparation and Abrasion Resistance of Transparent Super-hydrophobic Coating by Combining Crater-like Silica Films with Acicular Boehmite Powder”, Materials Science and Engineering B, 161, p36-39. (2009)
T. Yanagisawa; A. Nakajima; Y. Kameshima; M. Sakai; K. Okada, A super-hydrophobic coating was prepared by combining a rigid base film with crater-like hemispherical holes and acicular nanoparticles. The acicular boehmite powder provides a high contact angle on the film surface. The rigid base film with crater-like hemispherical holes inhibits the rapid decrease of contact angle by surface rubbing. The combination of different roughness is an effective method for improving the abrasion resistance of super-hydrophobic films. (C) 2008 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
Materials Science and Engineering B, 2009年, ［査読有り］

Negative Line Tension for an Ionic Liquid on a Hydrophobic Fluoroalkylsilane Coating　　　　　　　　　　　　　　　
T. Furuta; M. Sakai; T. Isobe; A. Nakajima
Chemistry Letters, 38, 2009年, ［査読有り］

Rolling and Slipping Motion of aWater Droplet Sandwiched between Two Parallel Plates Coated with Fluoroalkylsilanes”, Applied Surface Science, 255, p3414-3420. (2008)
S. Suzuki; A. Nakajima; M. Sakai; A. Hashimoto; N. Yoshida; Y. Kameshima; K. Okada, Si plates were treated using two fluoroalkylsilanes (FAS17 and FAS3), and the internal fluidity of a water droplet sliding between two parallel plates on a slope was observed directly using particle image velocimetry (PIV) method with a high-speed camera system. The interfacial caterpillar-like rotation flows with slip motion at the solid-liquid interface were related to the combination of top and bottom wettabilities. The water droplets accelerated by a rolling and slipping motion on FAS17 coatings; the acceleration was dominated by a rolling motion on FAS3 coatings. A droplet's shape, solid-liquid molecular interaction, and the gravitic force will be important factors determining the sliding mode on a solid surface. (C) 2008 Elsevier B. V. All rights reserved., ELSEVIER SCIENCE BV
Applied Surface Science, 2008年12月, ［査読有り］

Direct Evaluation of the Sliding Motion of Water Droplets on Hydrophobic Silane Coatings　　　　　　　　　　　　　　　
A. Nakajima; S. Suzuki; M. Sakai; Y. Kameshima; and K. Okada
6th International Symposium on Contact Angle Wettability and Adhesion, University of Maine, Orono (USA)., 2008年07月, ［査読有り］

Evaluation of Flow Velocity Distribution in a Water Droplet during Sliding on Hydrophobic Surfaces by Particle Image Velocimetry　　　　　　　　　　　　　　　
M. Sakai; A. Hashimoto; S. Suzuki; N. Yoshida; Y. Kameshima; A. Nakajima
STAC2-STS1, Chiba (Japan)., 2008年05月, ［査読有り］

超撥水性表面上における空気層保持能力の評価方法の検討と、液滴転落挙動への粘性抵抗力の寄与　　　　　　　　　　　　　　　
酒井宗寿,中島 章
財団法人 神奈川科学技術アカデミー 平成19年度研究概要, 2008年

超撥水処理を施された管内及び水平面上で運動する液滴の内部流動　　　　　　　　　　　　　　　
酒井宗寿,河野広希,中島 章,酒井秀樹,阿部正彦,藤嶋 昭
可視化情報, 2008年

動的撥水性評価のための転落挙動解析システムの開発　　　　　　　　　　　　　　　
酒井宗寿; 中島 章
色材協会誌, 2008年, ［査読有り］

Sliding Behavior of Water Droplets on Line-Patterned Hydrophobic Surfaces”, Applied Surface Science, 254, 6, p1797-1805. (2008)
S.Suzuki; A. Nakajima; K. Tanaka; M. Sakai; A. Hashimoto; N. Yoshida; Y. Kameshima; K. Okada, We prepared line-patterned hydrophobic surfaces using fluoroalkylsilane (FAS) and octadecyltrimethoxysilane (ODS) then investigated the effect of line direction on sliding behavior of water droplets by direct observation of the actual droplet motion during sliding. Water droplets slide down with a periodic large deformation of the contact line and sliding velocity fluctuation that occurred when they crossed over the 500-mu m ODS line regions in FAS regions on a Si surface tilted at 35 degrees. These behaviors are less marked for motion on a 100-mu m line surface, or on lines oriented parallel to the slope direction. Smaller droplets slide down with greater displacement in the line direction on 500-mu m line patterning when the lines were rotated at 13 degrees in-plane for the slope direction. This sliding behavior depended on the droplet size and rotation angle, and is accountable by the balance between gravitational and retentive forces. (C) 2007 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
Applied Surface Science, 2008年, ［査読有り］

Direct Measurement of the Motion of Water Droplets on a Hydrophobic Self-assembled Monolayer Surface under Airflow”, Journal of the Surface Finishing Society of Japan, 59, 12, p907-912. (2008)　　　　　　　　　　　　　　　
A. Hashimoto; M. Sakai; N. Yoshida; S. Suzuki; Y. Kameshima; A. Nakajima
Journal of the Surface Finishing Society of Japan, 2008年, ［査読有り］

Effect of Liquid Viscosity on the Internal Fluidity of a Droplet Sliding on a Fluoroalkylsilane Coating”, Chemistry Letters, 37, 7, p688-689. (2008)
Y. Sakurada; S. Suzuki; M. Sakai; A. Nakajima; Y. Kameshima; K. Okada, The effect of liquid viscosity on the internal fluidity of droplets during sliding on an inclined Si surface treated with fluoroalkylsilane (FAS) was investigated for water-glycerin mixture using particle image velocimetry (PIV). Increasing viscosity remarkably decreases the slipping motion on the solid-liquid interface and overall sliding acceleration. It affects the rolling motion, but its degree of influence is smaller than that on slipping. The viscosity had different contributions to slipping and rolling motions of the droplets., CHEMICAL SOC JAPAN
Chemistry Letters, 2008年, ［査読有り］

Sliding Behavior of Water Droplets sandwitched between Hydrphobic Surfaces　　　　　　　　　　　　　　　
S. Suzuki; A. Nakajima; M. Sakai; A. Hashimoto; N. Yoshida; Y. Kameshima; K. Okada
TAS 2007 Conference, Paris (French)., 2007年10月, ［査読有り］

Sliding Behavior of a Water Droplet Between Two Hydrophobic Coatings by Self-Assembled Monolayer　　　　　　　　　　　　　　　
A. Nakajima; S. Suzuki; M. Sakai; A. Hashimoto; N. Yoshida; Y. Kameshima; K. Okada
AVS 54th International Symposium and Exhibition, Seattle (USA)., 2007年10月, ［査読有り］

The Observation of Sliding Behavior of Water Droplet on Surfaces Treated by Various Silanes　　　　　　　　　　　　　　　
S.Suzuki,K.Tanaka,M.Sakai,J.-H. Song,A.Hashimoto,N.Yoshida,Y.Kameshima,K.Okada,A.Nakajima
International Symposium on Interdisciplinary Science of Nanomaterials, Sendai (Japan)., 2007年01月, ［査読有り］

拡張収縮法による液滴動的撥水性の評価　　　　　　　　　　　　　　　
酒井宗寿
財団法人 神奈川科学技術アカデミー 中島「ナノウェッティング」プロジェクト研究概要集, 2007年

転落する液滴の内部流動の可視化　　　　　　　　　　　　　　　
酒井宗寿,鈴木俊介
財団法人 神奈川科学技術アカデミー 中島「ナノウェッティング」プロジェクト研究概要集, 2007年

液滴転落挙動解析システムの開発　　　　　　　　　　　　　　　
酒井宗寿
財団法人 神奈川科学技術アカデミー 中島「ナノウェッティング」プロジェクト研究概要集, 2007年

撥水表面上で転落する液滴のダイナミクス -PIV法を用いた内部流動の可視化-　　　　　　　　　　　　　　　
酒井宗寿,橋本綾子,鈴木俊介,吉田直哉,亀島欣一,杉淵美穂,中島 章
可視化情報, 2007年

Deformation and motion by gravity and magnetic field of a droplet of water-based magnetic fluid on a hydrophobic surface”, Applied Surface Science, 253, 6, p3098-3102. (2007)　　　　　　　　　　　　　　　
H. Asakura; A. Nakajima; M. Sakai; S. Suzuki; Y. Kameshima; K. Okada
Applied Surface Science, 2007年, ［査読有り］

Image Analysis System for Evaluating Sliding Behavior of a Liquid Droplet on a Hydrophobic Surface”, Review of Scientific Iinstruments 78, p045103 (5 pages). (2007)
M. Sakai; A. Hashimoto; N. Yoshida; S. Suzuki; Y. Kameshima; A. Nakajima, An analysis system was developed to evaluate the sliding behavior of a liquid droplet on a hydrophobic surface. This system enables continuous and simultaneous measurement of both the sliding acceleration and shape deformation during the sliding of a liquid droplet. Moreover, the velocity vector of the internal fluidity of a sliding droplet was obtained by employing particle image velocimetry in the analysis system. This evaluation method pioneers the measurement of the dynamic wettability of a hydrophobic solid surface., AMER INST PHYSICS
Review of Scientific Iinstruments, 2007年, ［査読有り］

Effect of Electrification Conditions on the Freezing of Supercooled Water Droplets on a Hydrophobic Coating”, Chemistry Letters, 36, 8, p1020-1021. (2007)
A. Nakajima; A. Imase; S. Suzuki; N. Yoshida; M. Sakai; A. Hashimoto; Y. Kameshima; H. Toshiyoshi; K. Okada, The effects of electrification processes on ice nucleation on an octadecanethiol (ODT) coating were investigated under two different conditions. Electrification provides the driving force of the movement to the three-phase contact line. This change promotes ice nucleation on the supercooled water droplet. In contrast, electrification before cooling inhibits freezing, probably because of the limitation of orientational freedom by the interaction between the surface charge and the dipole moment of water molecules., CHEMICAL SOC JAPAN
Chemistry Letters, 2007年, ［査読有り］

Hydrophobicity and Freezing of a Water Droplet on Fluoroalkylsilane Coatings with Different Roughness”, Langmuir, 23, 17, p8674-8677. (2007)
S. Suzuki; A. Nakajima; N. Yoshida; M. Sakai; A. Hashimoto; Y. Kameshima; K. Okada, Smooth (Ra approximate to 0. 1 nm) and rough (Ra approximate to 20 nm) coatings of 1H, 1H,2H,2H-perfluorodecyltrimethoxysilane (FAS17) were prepared by controlling process conditions. The water contact angles for the smooth and rough coatings were similar (107 degrees and 110 degrees, respectively), but their sliding angles differed considerably (10 degrees and 27 degrees, respectively). The surface potential on the smooth coating, assessed using Kelvin force microscopy, showed a sharp distribution, but that on the rough coating ranged widely, implying large chemical heterogeneity including residual SiOH groups. The freezing temperature of a supercooled water droplet on the rough coating was higher than that on the smooth coating., AMER CHEMICAL SOC
Langmuir, 2007年, ［査読有り］

Freezing of Water Droplets on Silicon Surfaces Coated with Various Silanes”, Chemical Physics Letters, 444, p37-41. (2007)
S. Suzuki; A. Nakajima; N. Yoshida; M. Sakai; A. Hashimoto; Y. Kameshima; K. Okada, The freezing behavior of a supercooled water droplet on a silicon surface treated with using various silanes was observed directly using a high-speed camera system. Freezing stability is best ensured by heterogeneous nucleation from a three-phase (solid-liquid-air)- contact line. Differential scanning calorimetry measurements revealed that the freezing temperature of a supercooled water droplet on a fluoro-alkylsilane monolayer was lower than that of alkylsilane. Interaction between the fluorocarbon and water molecule, in addition to structural characteristics of silanes, might play an important role in the heterogeneous nucleation of supercooled water. (C) 2007 Published by Elsevier B.V., ELSEVIER SCIENCE BV
Chemical Physics Letters, 2007年, ［査読有り］

Slipping and Rolling Ratio of Sliding Acceleration for a Water Droplet Sliding on Fluoroalkylsilane Coatings of Different Roughness”, Chemistry Letters, 37, p58-59. (2007)　　　　　　　　　　　　　　　
S. Suzuki; A. Nakajima; M. Sakai; Y. Sakurada; N. Yoshida; A. Hashimoto; Y. Kameshima; K. Okada
Chemistry Letters, 2007年, ［査読有り］

Effect of Air Flow on the Motion of Water Droplets on Inclined Hydrophobic Surfaces　　　　　　　　　　　　　　　
A. Hashimoto; M. Sakai; J-H. Song; S. Suzuki; N. Yoshida; Y. Kameshima; A. Nakajima
Asian Pacific Conference on Surface Science and Engineering, Hong Kong (China)., 2006年12月, ［査読有り］

Observation of Internal Fluidity in a Water Droplet during Sliding on Hydrophobic Surfaces by Particle Image Velocimetry　　　　　　　　　　　　　　　
M. Sakai; A. Hashimoto; M. Sugibuchi; S. Suzuki; N. Yoshida; Y. Kameshima; A. Nakajima
Asian Pacific Conference on Surface Science and Engineering, Hong Kong (China)., 2006年12月, ［査読有り］

Liquid Selection using Sliding Behavior of Droplets on Line-Pattered Hydrophobic Surfaces　　　　　　　　　　　　　　　
A. Nakajima; S. Suzuki; K. Tanaka; M. Sakai; A. Hashimoto; Y. Kameshima; N. Yoshida; K. Okada
AVS 53rd International Symposium & Exhibition, San Francisco (USA)., 2006年11月, ［査読有り］

Observation of Internal Fluidity in a Water Droplet during Sliding on Hydrophobic Surfaces by Particle Image Velocimetry　　　　　　　　　　　　　　　
M. Sakai; A. Hashimoto; M. Sugibuchi; S. Suzuki; N. Yoshida; Y. Kameshima; and A. Nakajima
AVS 53rd International Symposium & Exhibition, San Francisco (USA)., 2006年11月, ［査読有り］

Deformation and Motion of a Droplet of Water-based Magnetic Fluid on a Hydrophobic Surface by Gravity and Magnetic Field　　　　　　　　　　　　　　　
A. Nakajima; H. Asakura; Y. Kameshima; M. Sakai; A. Hashimoto; S.Suzuki; N. Yoshida; and K. Okada
AVS 53rd International Symposium & Exhibition, San Francisco (USA)., 2006年11月, ［査読有り］

Computational Simulations on the Interaction of Water and Hydrophobic Surface　　　　　　　　　　　　　　　
Y. Kameshima; S. Suzuki; M. Sakai; A. Hashimoto; N. Yoshida; K. Okada; and A. Nakajima
AVS 53rd International Symposium & Exhibition, San Francisco (USA)., 2006年11月, ［査読有り］

Motion of Water Droplets on Inclined Hydrophobic Surfaces in Flowing Air　　　　　　　　　　　　　　　
A. Hashimoto; J-H Song; M. Sakai; S. Suzuki; N. Yoshida; Y. Kameshima; and A. Nakajima
AVS 53rd International Symposium & Exhibition, San Francisco (USA)., 2006年11月, ［査読有り］

Dynamic Hydrophobicity on Ultrasmooth Alkyl and Fluoroalkyl Silanes Self-Assembled Monolayer Surfaces　　　　　　　　　　　　　　　
N. Yoshida; S. Suzuki; M. Sakai; J-H Song; A. Hashimoto; Y. Kameshima; and A. Nakajima
AVS 53rd International Symposium & Exhibition, San Francisco (USA)., 2006年11月, ［査読有り］

Control of Sliding Behavior ofWater Droplets on Line-patterned Surface by Various Silane Coatings　　　　　　　　　　　　　　　
S. Suzuki; M. Sakai; J.-H. Song; A. Hashimoto; N. Yoshida; Y. Kameshima; K. Okada; and A. Nakajima
ICCG 2006, Dresden (Germany)., 2006年06月, ［査読有り］

Characterization in the droplet downfall on the hydrophobic surface　　　　　　　　　　　　　　　
M. Sakai; J-H. Song; A. Hashimoto; Y. Akutsu; S. Suzuki; N. Yoshida; Y. Kameshima; M. Sugibuchi; A. Nakajima
ICCG 2006, Dresden (Germany)., 2006年06月, ［査読有り］

液滴転落挙動解析システムの開発　　　　　　　　　　　　　　　
酒井宗寿
財団法人 神奈川科学技術アカデミー 平成17年度研究概要, 2006年

PIV法を用いた撥水表面上における液滴転落時の内部流動の可視化
酒井宗寿,橋本綾子,鈴木俊介,吉田直哉,亀島欣一,杉渕美穂,中島 章, To characterize sliding behavior of water droplets with dynamic contact angles on hydrophobic, the instrument was developed. Sliding action of the droplet was classified into three motion categories: constant accelerated motion, constant velocity and stasis. The action of the sliding droplet was controlled by the interaction between solid and liquid surface. This interaction was expressed by the internal fluidity of the sliding droplet. The device with PIV facilitated the measurement of the sliding acceleration, shape variation and internal fluidity in the sliding droplet., The Visualization Society of Japan
可視化情報, 2006年

Sliding Acceleration of Water Droplets on a Surface Coated with Fluoroalkylsilane and Octadecyltrimethoxysilane”, Surface Science, 600, p2214-2219. (2006)
S. Suzuki; A. Nakajima; M. Sakai; J-H. Song; N. Yoshida; Y. Kameshima; K. Okada, Both fluoroalkylsilane (FAS) and octadecyltrimethoxysilane (ODS) were coated on oxidized silicon wafers using soaking and CVD method. Smooth coatings with Ra values of less than 1 nm were attained. The slope of the sliding acceleration against the inverse of the droplet mass showed an inflection point. That point shifted to the direction of smaller droplets with decreasing FAS ratio to ODS. The water droplets' length was increased when the sliding velocity was increased. Fluoroalkylsilane addition to ODS increases the interaction between water and the hydrophobic surface. Results showed that the sliding acceleration of a water droplet depends strongly on the surface ratio of these silanes. (c) 2006 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
Surface Science, 2006年, ［査読有り］

Direct Observation of Internal Fluidity in a Water Droplet during Sliding on Hydrophobic Surfaces”, Langmuir, 22, 11, p4906-4909. (2006)
M. Sakai; J-H. Song; N. Yoshida; S. Suzuki; Y. Kameshima; A. Nakajima, In the current study, we used a high-speed camera system with particle image velocimetry to observe the internal fluidity of water droplets during sliding. The droplets' velocity during sliding was controlled by slipping and rolling motions. On the superhydrophobic surface, with a contact angle of 150, the droplet fell at high velocity by slipping. However, on a normal hydrophobic surface whose water contact angle was around 100, both slipping and rolling controlled the droplet's velocity during sliding. In addition, the advancing velocity might be large when the slip velocity is large and the contact area is small., AMER CHEMICAL SOC
Langmuir, 2006年, ［査読有り］

Dynamic Hydrophobicity of Water Droplets on the Line-Patterned Hydrophobic Surfaces”, Surface Science, 600, p2711-2717. (2006)
J-H. Song; M. Sakai; N. Yoshida; S. Suzuki; Y. Kameshima; A. Nakajima, Static and dynamic hydrophobicities of water droplet on a patterned surface prepared using fluoroalkylsilanes with different molecular chain lengths were investigated. Contact angles on the patterned surfaces well agreed with values predicted using Cassie's theory. On the same line width ratio, total retention force was governed by the fluoroalkylsilane with slow-sliding acceleration. The total retention force decreased with the decreasing width ratio of silane with slow-sliding acceleration on the surface. These results imply that the sliding acceleration of water droplets on a hydrophobic surface depends both on chemical composition and patterning structure. (c) 2006 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
Surface Science, 2006年, ［査読有り］

Relationship between Sliding Acceleration of Water Droplets and Dynamic Contact Angles on Hydrophobic Surfaces”, Surface Science, 600, L204-L208. (2006)
M. Sakai; J-H. Song; N. Yoshida; S. Suzuki; Y. Kameshima; A. Nakajima, This study measured sliding acceleration of water droplets on hydrophobic solid surfaces and used expanding and contracting method to compare that value with dynamic contact angles. Sliding action of the droplet was classified into three motion categories: constant accelerated motion, constant velocity and stasis. Differences exist in the dependencies of contact radius and the injection-suction rate in dynamic contact angle hysteresis according to these categories. This method is an effective indicator of water droplets' sliding acceleration. (c) 2006 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
Surface Science, 2006年, ［査読有り］

Internal fluidity in the droplet downfall on the hydrophobic surface　　　　　　　　　　　　　　　
M. Sakai; J-H. Song; Y. Akutsu; S. Suzuki; N. Yoshida; Y. Kameshima; A. Nakajima
PACIFICHEM 2005, Honolulu in Hawaii (USA)., 2005年12月, ［査読有り］

Static and dynamic hydrophobicity on smooth fluoroalkylsilane and alkylsilane self-assembled monolayer surfaces　　　　　　　　　　　　　　　
N. Yoshida; S. Suzuki; J. H. Song; M. Sakai; Y. Kameshima; A. Nakajima
PACIFICHEM 2005, Honolulu in Hawaii (USA)., 2005年12月, ［査読有り］

Effect of mixing ratio on the sliding acceleration of a water droplet on the hydrophobic surface treated with two different silanes　　　　　　　　　　　　　　　
S. Suzuki; A. Nakajima; M. Sakai; J. H. Song; N. Yoshida; Y. Kameshima; K. Okada
PACIFICHEM 2005, Honolulu in Hawaii (USA)., 2005年12月, ［査読有り］

Molecular orbital calculation on the interaction of water and hydrophobic surface　　　　　　　　　　　　　　　
Y. Kameshima; S. Suzuki; N. Yoshida; M. Sakai; J. H. Song; A. Nakajima
PACIFICHEM 2005, Honolulu in Hawaii (USA)., 2005年12月, ［査読有り］

Static and dynamic hydrophobicity of a water droplet on the patterned hydrophobic surface　　　　　　　　　　　　　　　
J. H. Song; M. Sakai; S. Suzuki; N. Yoshida; Y. Kameshima; A. Nakajima
PACIFICHEM 2005, Honolulu in Hawaii (USA)., 2005年12月, ［査読有り］

Relationship between sliding acceleration of water droplets and advancing-receding contact angles　　　　　　　　　　　　　　　
M. Sakai; J-H. Song; Y. Akutsu; S. Suzuki; N. Yoshida; Y. Kameshima; M. Sugibuchi; A. Nakajima
ISSS-4, Saitama (Japan)., 2005年11月, ［査読有り］

Effects of side chain length on static and dynamic hydrophobicity of alkyl methacrylate polymer surface　　　　　　　　　　　　　　　
Y. Akutsu; I. Komatsu; N. Yoshida; S. Suzuki; J. Song; M. Sakai; Y. Kameshima; A. Nakajima
ISSS-4, Saitama (Japan)., 2005年11月, ［査読有り］

Dynamic hydrophobicity on ultrasmooth fluoroalkylsilane and alkylsilane self-assembled monolayer surfaces　　　　　　　　　　　　　　　
N. Yoshida; S. Suzuki; J. Song; M. Sakai; Y. Kameshima; A. Nakajima
ISSS-4, Saitama (Japan)., 2005年11月, ［査読有り］

Dynamic hydrophobicity of Si coated with various silanes　　　　　　　　　　　　　　　
S. Suzuki; N. Yoshida; M. Sakai; J. H. Song; Y. Kameshima; K. Okada; A. Nakajima
ISSS-4, Saitama (Japan)., 2005年11月, ［査読有り］

Molecular orbital calculation on the interaction of water and hydrocarbon/fluorocarbon surface　　　　　　　　　　　　　　　
Y. Kameshima; S. Suzuki; N. Yoshida; M. Sakai; J. H. Song; A. Nakajima
ISSS-4, Saitama (Japan)., 2005年11月, ［査読有り］

Static and dynamic hydrophobicity of liquid droplets on the patterned hydrophobic surface using photolithography　　　　　　　　　　　　　　　
J. H. Song; M. Sakai; S. Suzuki; N. Yoshida; Y. Kameshima; Y. Akutsu; A. Nakajima
ISSS-4, Saitama (Japan)., 2005年11月, ［査読有り］

Freezing of supercooled water droplets and dynamic hydrophobicity on solid surface coated with various silanes　　　　　　　　　　　　　　　
S. Suzuki; A. Nakajima; M. Sakai; J.-H. Song; N. Yoshida; Y. Kameshima; K. Okada
1st Asia-Oceania Ceramic Federation Conference (AOCF), Osaka (Japan)., 2005年09月, ［査読有り］

The sliding acceleration of water droplets on silicon surface treated by fluoroalkylsilane and octadecyltrimethoxysilane　　　　　　　　　　　　　　　
S. Suzuki; A. Nakajima; M. Sakai; J.-H. Song; N. Yoshida; Y. Kameshima; K. Okada
ICMAT2005, Singapore., 2005年07月, ［査読有り］

液滴転落挙動解析装置，手法の開発　　　　　　　　　　　　　　　
酒井宗寿
財団法人 神奈川科学技術アカデミー 平成16年度研究概要, 2005年

融体破砕実験装置の製作　　　　　　　　　　　　　　　
小林浩三,酒井宗寿,加藤 工
高エネルギー加速器研究機構技術研究会報告集, 2004年

Size distribution of fragmented melt particles by rapid gas flow　　　　　　　　　　　　　　　
M. Sakai; T. Kato; K. Kobayashi; T. Hayakawa
IUGG 2003, Sapporo (Japan), July, 2003., 2003年07月, ［査読有り］

Laboratory experiments on phreatomagmatic explosion”, Dynamics of vapor explosions final report　　　　　　　　　　　　　　　
T. Kato; K. Takanashi; M. Sakai
1998年

爆発的火山噴火とマグマ水蒸気爆発に関する室内実験　　　　　　　　　　　　　　　
加藤 工,高梨一仁,酒井宗寿
蒸気爆発の動力学研究成果報告書, 1997年

花巻地方北上低地帯西縁の地質境界断面路頭　　　　　　　　　　　　　　　
渡辺満久; 澤 祥; 吾妻 祟; 花巻活断層研究グループ(藤井 亨; 酒井宗寿; 山川英範; 綿貫拓也)
活断層研究, 1996年, ［査読有り］

酸化チタンを添加した高度撥水材料の開発
酒井宗寿,中島 章
光アライアンス, 2013年

転落加速度によるコーティング面の撥水性評価（4）～動的撥水性の計測(2)～
酒井宗寿,中島 章
コーンバーテック, 2007年

転落加速度によるコーティング面の撥水性評価（3）～動的撥水性の計測(1)～
酒井宗寿,中島 章
コーンバーテック, 2007年

撥水コーティングガラスにおける水滴の物理化学
中島 章・酒井宗寿
New Glass, 2005年

〔主要な業績〕自然災害からのサバイブ,地域の防災と減災　　　　　　　　　　　　　　　
若月 泰孝、藤田 昌史、小林 薫、武田 茂樹、桑原 祐史、伊藤 哲司、齋藤 芳徳、熊澤 貴之、田中 耕市、酒井 宗寿, 編者(編著者)
ゆたり出版, 2023年08月
9784990993825

Handbook of Self-Cleaning Surfaces and Materials: From Fundamentals to Application,Surface Factors for Static/Dynamic Hydrophobicity and Their Evaluation
Book Editor(s):Xintong Zhang; Donald Tryk; Hiroshi Irie; Akira Fujishima; Akira Nakajima; Munetoshi Sakai, 分担執筆
Wiley-VCH Verlag GmbH & Co., 2023年04月21日
9783527330966

防汚・防曇技術の最新動向　　　　　　　　　　　　　　　
酒井宗寿・中島 章, 共編者(共編著者)
シーエムシー出版, 2021年10月08日
9784781316185

撥水・撥油・親水性材料の開発動向,酸化チタン光触媒による光誘起超親水性コーティング　　　　　　　　　　　　　　　
酒井宗寿・石黒 斉・中島 章, 分担執筆
シーエムシー出版, 2021年03月21日
9784781315966

超親水・親油性表面の技術　　　　　　　　　　　　　　　
酒井宗寿・中島 章, 共著
サイエンス＆テクノロジー, 2018年03月29日
9784864281713

防汚・防水・防食および撥水親水に関する技術資料集　　　　　　　　　　　　　　　
酒井宗寿・中島 章, 共著
技術情報協会, 2018年

ぬれと（超）撥水、（超）親水技術、そのコントロール」，第２章 撥水・親水の指標である接触角を理解・把握する：「動的撥水性（転落挙動）測定・評価手法の開発」　　　　　　　　　　　　　　　
中島 章・酒井宗寿, 共著
技術情報協会, 2007年07月

地域ポテンシャルを活かすための産学連携の取り組み　　　　　　　　　　　　　　　
酒井宗寿
北陸未来共創フォーラムマテリアル分科会 R５年度第２回分科会セミナー＆合同WG発表会, 2024年03月26日, ［招待有り］
20240326, 20240326

表面濡れ性及び撥水・親水性の基礎と,高機能性表面設計の指針,～高耐久超撥水表面、防汚性・防曇性、抗ウイルス性等～　　　　　　　　　　　　　　　
酒井宗寿
情報機構 セミナー, 2024年03月18日, ［招待有り］
20240318

【INPITスポンサーセッション】 『産・学・官 仁義ある戦い』 ～スタートアップ知財篇～　　　　　　　　　　　　　　　
酒井宗寿
UNITTアニュアルカンファレンス2023（AC2023）, 2023年09月20日, ［招待有り］
20230919, 20230921

〔主要な業績〕固体表面における動的な濡れ性の機能性評価方法　　　　　　　　　　　　　　　
酒井宗寿
京都大学 高分子材料設計セミナー, 2023年08月28日, ［招待有り］
20230828

〔主要な業績〕可視光応答型光触媒を目指した銀担持シリカチタニアコアシェル型ナノ粒子の作製　　　　　　　　　　　　　　　
第33回 日本化学会関東支部 茨城地区研究交流会, 2022年12月07日

〔主要な業績〕Fabrication of Silver-Immobilized Silica/Titania Core-Shell Nanoparticles Toward Visible Light Responsive Photocatalysts　　　　　　　　　　　　　　　
Kengo Arai1; Noriko Yamauchi1; Shohei Tada2; Munetoshi Sakai1; Yoshio Kobayashi1
第７回茨城大学量子線科学国際シンポジウム, 2022年12月
20221201, 20221203

ライデンフロスト現象による水滴の自走の主要機構の時間依存性　　　　　　　　　　　　　　　
廣澤拓哉; 望月 泰英; 磯部敏宏; 松下祥子; 中島章; 山本憲; 酒井宗寿.
日本セラミックス協会2022年年会, 2022年03月11日, 日本セラミックス協会

ラチェット上におけるライデンフロスト液滴駆動の温度・壁面依存性　　　　　　　　　　　　　　　
廣澤 拓哉; 酒井 宗寿; 山本 憲; 元祐 昌廣; 磯部 敏宏; 松下 祥子; 中島 章
日本機械学会熱工学コンファレンス2021, 2021年10月

ポストコロナ社会における大学教員の働き方を探りたい ～業務見える化シートの開発～　　　　　　　　　　　　　　　
梶野顕明、鈴木和美、平山太市、間宮るい、酒井宗寿、藤澤清史、鈴木義人、金野 満
RA協議会 第7回年次大会, 2021年09月

茨城県日立地域における公民学連携の取り組み　　　　　　　　　　　　　　　
酒井宗寿・相馬憲一・赤岩正樹・鈴木裕宣・梶野顕明・平山太市・園部 浩・酒井 勝・間宮るい・藤澤清史・金野 満
産学連携学会 第18回大会（秋田大会）, 2020年11月18日, 産学連携学会, ［招待有り］
20201117, 20201118

身近な事例から考える地域社会 I (エネルギーと環境)　　　　　　　　　　　　　　　
2023年 - 現在
茨城大学

身近な事例から考える地域社会 II (気象災害と地域防災)　　　　　　　　　　　　　　　
2022年 - 現在
茨城大学

知的財産と社会実装　　　　　　　　　　　　　　　
2021年 - 現在
茨城大学

基礎物理化学　　　　　　　　　　　　　　　
2014年 - 現在
明治大学

知的所有権特論（日本弁理士会寄附講座「特別大学支援プログラム」）　　　　　　　　　　　　　　　
2024年
茨城大学

電気電子情報特別講義　　　　　　　　　　　　　　　
2022年10月
神奈川大学

環境と人間 身近な事例から最新の地域防災を考えるII　　　　　　　　　　　　　　　
2021年 - 2022年
茨城大学

環境と人間 身近な事例から最新の地域防災を考えるⅠ　　　　　　　　　　　　　　　
2021年 - 2022年
茨城大学

2010年07月, 色材協会

2007年07月, 可視化情報学会

2004年12月, セラミックス協会

2004年12月, 日本化学会

1995年07月, 日本火山学会（地球惑星科学関連学協会）

一般社団法人 日本知財学会

〔主要な業績〕Greater Tokyo Innovation Ecosystem (GTIE)　　　　　　　　　　　　　　　
2024年02月 - 2030年03月

環境・防災・エネルギーに関連する実施事業　　　　　　　　　　　　　　　
2023年04月 - 2026年03月

新規無機微粒子の開発と光触媒等への応用に関する研究　　　　　　　　　　　　　　　
新規無機微粒子の開発と光触媒等への応用に関する研究
2022年07月 - 2024年03月

産学連携知的財産アドバイザー派遣事業　　　　　　　　　　　　　　　
2019年04月 - 2022年03月

地方版MaaSの広域連携基盤構築モデル事業　　　　　　　　　　　　　　　
日本版MaaS推進・支援事業 （国土交通省）
2020年07月 - 2021年06月

異業種との連携による収益活用・付加価値創出　　　　　　　　　　　　　　　
先進パイロット地域 （経済産業省）
2020年07月 - 2021年06月

光触媒能を有する球状ナノ粒子の創成　　　　　　　　　　　　　　　
2021年04月

ライデンフロスト現象を用いた新規低温廃熱エネルギー回収システム開発への挑戦　　　　　　　　　　　　　　　
挑戦的研究（萌芽）
2018年06月 - 2021年03月

日立地域 MaaS 実証試験（仮称）　　　　　　　　　　　　　　　
地域公共交通確保維持改善事業費補助金
2019年07月 - 2020年06月

日立地域MaaS実証試験（仮）　　　　　　　　　　　　　　　
パイロット地域分析事業
2019年07月 - 2020年03月

日立地域MasS実証試験（仮）　　　　　　　　　　　　　　　
パイロット地域分析事業
2019年07月 - 2020年03月

光誘起還元能を用いた有機・無機ハイブリッド環境負荷低減材料の創成　　　　　　　　　　　　　　　
基盤研究（B）
2016年04月 - 2019年03月

新陳代謝機能を付与した光触媒による高効率環境浄化材料の創成　　　　　　　　　　　　　　　
基盤研究 B
2012年04月 - 2015年03月

低炭素社会実現に資する有機系太陽電池の開発（PL 東京大学 瀬川 浩司 教授）,サブテーマ：認証データ計測センター機能構築と要素技術の開発・評価（研究代表者 東京理科大学 藤嶋 昭 学長）」　　　　　　　　　　　　　　　
内閣府 最先端研究開発支援プログラム（First）
2010年04月 - 2014年03月

低炭素社会実現に資する有機系太陽電池の開発（PL 東京大学 瀬川 浩司 教授）,サブテーマ：認証データ計測センター機能構築と要素技術の開発・評価（研究代表者 東京理科大学 藤嶋 昭 学長）」　　　　　　　　　　　　　　　
内閣府 最先端研究開発支援プログラム（First）
2010年04月 - 2014年03月

水中での固体表面の濡れ性変化に基づく気液界面の挙動ダイナミクス　　　　　　　　　　　　　　　
挑戦的萌芽研究
2011年04月 - 2013年03月

固液界面付近における流動ダイナミクスの解明と新規濡れ性機能表面の創製 －撥水・親水現象の新たな応用展開方法の確立－　　　　　　　　　　　　　　　
日本板硝子材料工学助成会
2008年04月 - 2009年03月

PIV（粒子画像流速測定）法を用いた、撥水性固体表面での液滴転落挙動評価システムの開発 ―液滴内部流動の測定方法の確立―　　　　　　　　　　　　　　　
2005年10月 - 2007年09月

外部場と超撥水コーティングを利用したマイクロポンプの作製　　　　　　　　　　　　　　　
若手研究 B
2005年04月 - 2007年03月

撥水表面上における滑落挙動の直接観察と、それを用いた高速液滴滑落表面及び低造波抵抗表面の創製　　　　　　　　　　　　　　　
日本科学協会 笹川科学研究助成
2005年04月 - 2006年03月

特許第4563890号, 特願2005-231801(P2005-231801), 液滴移動挙動の測定方法および装置
酒井 宗寿

特開2006-226835(P2006-226835A), 特願2005-41087, 液滴除去性能の評価方法および評価装置
酒井 宗寿, 吉田 直哉

公開2007-232449, 特願2006-51982, 液滴の分離方法及び検査方法
鈴木 俊介,中島 章,酒井 宗寿

特開2007-248436, 液滴転落挙動における内部流動測定方法および装置
酒井 宗寿

特許第4922633号, 特開2007-256168, 液滴挙動解析方法および装置
酒井 宗寿,中村 満美子,佐藤 眞平

特開2010-14468, 固体表面の液体中における気体保持状態検知方法および装置
酒井 宗寿,中島 章,柳澤 智大

特許第5680312号, 特開2011-162672, 光触媒機能を有する撥水性構造体
酒井 宗寿,中島 章

特許第6043077号, 撥水性構造体およびその製造方法
酒井 宗寿,中島 章

特開2017-88417, 多孔質結晶性金属酸化物ナノ粒子の製造方法及び多孔質結晶性金属酸化物ナノ粒子

PCT/JP2010/062451, LIQUID FLOW RESISTANCE SUPPRESSING SURFACE STRUCTURE AND METHOD FOR SUPPRESSING THE LIQUID FLOW RESISTANCE OF A SUBSTRATE SURFACE
SAKAI Munetoshi, NAKAJIMA Akira

特開2006-257337(P2006-257337A), 撥水性固体表面での液滴の転落加速度の制御方法およびその方法により制御された撥水性固体表面を有する構造体
鈴木 俊介, 中島 章, 酒井 宗寿

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