ノウダ ヨウヘイ能田 洋平講師Yohei NODA
■研究者基本情報
学歴
経歴
■研究活動情報
論文
- Development of nanosized graphene material for neutron intensity enhancement below cold neutron energy
Makoto Teshigawara; Yujiro Ikeda; Kazuo Muramatsu; Koichi Sutani; Masafumi Fukuzumi; Yohei Noda; Satoshi Koizumi; Koichi Saruta; Yoshie Otake, We have been developing nanosized graphene, called graphene flower, as a material that induces coherent scattering very cold neutrons. Previous experiments have found that the seed part of the graphene flower is more effective than the petal part in increasing the coherent scattering. Based on these results, we found that further modification of the graphene flower to increase the seed portion increased the total cross-section, although it did not reach the level of nanodiamonds., IOS Press
Journal of Neutron Research, 2024年04月25日, ［査読有り］ - Effects of functional graft polymers on phase separation and ion-channel structures in anion exchange membranes analyzed by SANS partial scattering function
Kimio Yoshimura; Akihiro Hiroki; Aurel Radulescu; Yohei Noda; Satoshi Koizumi; Yue Zhao; Yasunari Maekawa
Macromolecules, 2024年02月, ［査読有り］ - 〔主要な業績〕Water distribution in human hair microstructure elucidated by spin contrast variation small-angle neutron scattering
Y. Noda; S. Koizumi; T. Maeda; T. Inada; A. Ishihara, 筆頭著者, International Union of Crystallography
Journal of Applied Crystallography, 2023年08月01日, ［査読有り］ - Microscopic depictions of vanishing shampoo foam examined by time-of-flight small-angle neutron scattering
Satoshi Koizumi; Yohei Noda; Takumi Inada; Tomoki Maeda; Shiho Yada; Tomokazu Yoshimura; Hiroshi Shimosegawa; Hiroya Fujita; Munehiro Yamada; Yukako Matsue, MDPI
Quantum Beam Science, 2023年01月29日, ［査読有り］ - New material exploration to enhance neutron intensity below cold neutrons: nanosized graphene flower aggregation
M. Teshigawara; Y. Ikeda; M. Yan; K. Muramatsu; K. Sutani; M. Fukuzumi; Y. Noda; S. Koizumi; K. Saruta; and Y. Otake, MDPI
Nanomaterials, 2022年12月23日, ［査読有り］ - Analysis of water distribution in delipidated human hair by small-angle neutron scattering (SANS)
A. Ishihara; Y. Tsukamoto; H. Inoue; Y. Noda; S. Koizumi; and K. Joko, Wiley
International Journal of Cosmetic Science, 2021年10月19日, ［査読有り］ - Protein neutron diffraction experiment with dynamic nuclear polarization
I. Tanaka; H. Nishino; H. Yamauchi; Y. Noda; T. Maeda; S. Koizumi, IUCr
Acta Crystallographica Section A, 2021年08月, ［査読有り］ - Advanced Small-Angle Scattering Instrument Available in the Tokyo Area. Time-Of-Flight, Small-Angle Neutron Scattering Developed on the iMATERIA Diffractometer at the High Intensity Pulsed Neutron Source J-PARC
S. Koizumi; Y. Noda; T. Maeda; T. Inada; S. Ueda; T. Fujisawa; H. Izunome; R. A. Robinson; and H. Frielinghaus, A method of time-of-flight, small-angle neutron scattering (TOF-SANS) has been developed based on the iMATERIA powder diffractometer at BL20, of the Materials and Life Sciences Facility (MLF) at the high-intensity proton accelerator (J-PARC). A large-area detector for SANS, which is composed of triple-layered 3He tube detectors, has a hole at its center in order to release a direct beam behind and to detect ultra-small-angle scattering. As a result, the pulsed-neutron TOF method enables us to perform multiscale observations covering 0.003 < q (Å−1) < 40 (qmax/qmix = 1.3 × 104) and to determine the static structure factor S(q) and/or form factor P(q) under real-time and in-situ conditions. Our challenge, using unique sample accessories of a super-conducting magnet and polarized neutron, is dynamic nuclear polarization (DNP) for contrast variation, especially for industrial use. To reinforce conventional SANS measurements with powder materials, grazing-incidence small-angle neutron scattering (GISANS) or reflectivity is also available on the iMATERIA instrument., MDPI
Quantum Beam Science, 2020年12月02日, ［査読有り］ - First Experiment of Spin Contrast Variation Small-Angle Neutron Scattering on the iMATERIA Instument at J-PARC
Y. Noda; T. Maeda; T. Oku; S. Koizumi; T. Masui; and H. Kishimoto, 筆頭著者, MDPI
Quantum Beam Science, 2020年09月25日, ［査読有り］ - The Large-Area Detector for Small-Angle Neutron Scattering on iMATERIA at J-PARC
Y. Noda; H. Izunome; T. Maeda; T. Inada; S. Ueda; and S. Koizumi, 筆頭著者, An area detector with a central hole structure was built up for small-angle neutron scattering (SANS) on the iMATERIA instrument at Japan Proton Accelerator Research Complex (J-PARC). Linear position-sensitive detector tubes filled with 3He gas were arranged in three layers leaving a central hole. As a result of the calibration process, a SANS measurement with wide q-range from 0.007 Å−1 to 4.3 Å−1 was achieved in double-frame operation, supplying neutrons with wavelengths from 1 Å to 10 Å. As a merit of this central hole structure, neutron transmission can be measured simultaneously to reduce experimental time and effort. This is ideal for time-resolved studies, in which the sample transmission can be time-dependent, throughout the whole experiment. Additionally, the data storage system in ‘event mode’ format provides an excellent platform for such time-resolved experiments., MDPI
Quantum Beam Science, 2020年09月23日, ［査読有り］ - A long side chain imidazolium-based graft-type anion-exchange membrane: novel electrolyte and alkaline-durable properties and structural elucidation using SANS contrast variation
Y. Zhao; K. Yoshimura; A. M. A. Mahmoud; H. Yu; S. Okushima; A. Hiroki; Y. Kishiyama; H. Shishitani; S. Yamaguchi; H. Tanaka; Y. Noda; S. Koizumi; A. Radulescue; and Y. Maekawa, Royal Society of Chemistry
Soft Matter, 2020年08月, ［査読有り］ - Fuel cell electrode characterization using neutron scattering
O. Holderer; M. Carmo; M. Shviro; W. Lehnert; Y. Noda; S. Koizumi; M. Appavou; M. Appel; and H. Frielinghaus, MDPI
materials, 2020年03月24日, ［査読有り］ - Microstructure and water distribution in catalysis for polymer electrolyte fuel cells, elucidated by contrast variation small-angle neutron scattering
S. Koizumi; S. Ueda; T. Inada; Y. Noda; R. A. Robinson, By using small-angle neutron scattering (SANS) reinforced by scanning electron microscopy, the fine structure of catalysts for polymer electrolyte fuel cells has been investigated. The experimental data resulting from contrast variation with mixed light and heavy water (H2O/D2O) are well described by a core-shell model with fluctuations in concentration between water and Nafion. In particular, SANS obtained with the mixed water ratio 30/70, which corresponds to a matching point between mixed water and Nafion, shows a broad scattering maximum, which is attributed to a 5nm-thick Nafion shell on the surface of the larger carbon particles. After swelling by water, the ionomer layer absorbs water at the 17wt% level. By changing the H2O/D2O ratio, it was further confirmed that the catalyst with the ionomer exhibits water repellence, whereas the bare catalyst without the ionomer is wetted by water. Because it is very difficult to extract more information, for instance regarding the Pt-Nafion interactions, by means of small-angle scattering, reflectometry and grazing-incidence scattering experiments with neutrons should be attempted on a model catalyst prepared on a flat substrate., IUCr
Journal of Applied Crystallography, 2019年07月22日, ［査読有り］ - Micellar structure of perfluorooctanesulfonic acid in water investigated by combination of SAXS and SANS
T. Inada; S. Ueda; Y. Noda; T. Maeda; K. Kanie; S. Koizumi, The Physical Society of Japan
JPS conference proceedings, 2019年03月28日, ［査読有り］ - A variety of Small-angle neutron scattering instruments available in Tokyo area, Japan - Complimentary use of accelerator and reactor -
S. Koizumi; Y. Noda, The Physical Society of Japan
JPS conference proceedings, 2019年03月28日, ［査読有り］ - Size-tunable MRI-visible nitroxide-based magnetic mixed micelles: preparation, stability, and theranostic application
K. Nagura; A. Bogdanov; N. Chumakova; A. Kh Vorobiev; S. Moronaga; H. Imai; T. Matsuda; Y. Noda; T. Maeda; S. Koizumi; K. Sakamoto; T. Amano; F. Yoshino; T. Kato; N. Komatsu; R. Tamura, Metal-free magnetic mixed micelles (mean diameter: 16 nm) composed of biocompatible surfactant Tween 80 and hydrophobic pyrrolidine-N-oxyl radical were prepared by mixing them in phosphate-buffered saline. The magnetic mixed micelles were characterized by dynamic light scattering and small angle neutron scattering measurements. The stability of the micelles is found to depend on the length of alkyl side chain in the nitroxide compounds and degree of unsaturation in the hydrophobic chain in the surfactant. The size of the mixed micelle can be tuned by changing the molar ratio of Tween 80 and nitroxyl radical. In view of theranostic application of the micelle, the cytotoxicity and stability in a physiological environment was investigated; the mixed micelle exhibited no cytotoxicity, high colloidal stability and high resistance towards reduction by large excess ascorbic acid. The in vitro and in vivo magnetic resonance imaging (MRI) revealed sufficient contrast enhancement in the proton longitudinal relaxation time (T 1) weighted images. In addition, hydrophobic fluorophores and an anticancer drug are stably encapsulated in the mixed micelles and showed fluorescence (FL) upon reduction by ascorbic acid and cytotoxicity to cancer cells, respectively. For example, the paclitaxel-loaded mixed micelles efficiently suppressed cancer cell growth. Furthermore, they were found to give higher MRI contrast (higher r 1 value) in vitro than the micelles without paclitaxel. The magnetic mixed micelles presented here are promising theranostic agents in nanomedicine due to their high biocompatibility and high resistivity towards reduction as well as functioning as a drug carrier in therapy and MR or FL imaging probe in diagnosis., IOP publishing
Nanotechnology, 2019年03月19日, ［査読有り］ - The locally columnar model for clay/polymer systems: Connections to scattering experiments
H. Frielinghaus; K. Koch; V. P. Antonio; Y. Noda; S. Koizumi, Elsevier
Journal of Colloid and Interface Science, 2019年02月28日, ［査読有り］ - Dynamic nuclear polarization apparatus for contrast variation neutron scattering experiments on iMATERIA spectrometer at J-PARC
Y. Noda; S. Koizumi, Elsevier
Nuclear Instruments and Methods in Physics Research, A, 2019年01月29日, ［査読有り］ - 7T超電導マグネットの導入による核スピン偏極コントラスト変調法の高効率化
能田洋平、小泉智, 中性子産業利用推進協議会
四季, 2018年09月25日, ［招待有り］ - Contrast variation by dynamic nuclear polarization and time-of-flight small-angle neutron scattering
Y. Noda; S. Koizumi; T. Masui; R. Mashita; H. Kishimoto; D. Yamaguchi; T. Kumada; S. Takata; K. Ohishi; J. Suzuki, J-PARC center (KEK, JAEA), CROSS
MLF annual report 2016, 2018年02月26日, ［招待有り］ - Mesoscopic Investigation of an “Immiscible” Cyclohexane and Water Micro-Mixture in Carbon Micropores by Contrast Variation Small-Angle Neutron Scattering
M. Yoshimoto; Y. Yoshida; Y. Noda; S. Koizumi; S. Takata; J. Suzuki; A. Hoshikawa; T. Ishigaki; S. Ozeki; T. Iiyama, Microspaces can simultaneously capture "immiscible" molecules such as cyclohexane and water due to fluidsurface interactions. We investigated the mesoscopic structure of cyclohexane and water co-adsorbed in carbon micropores using contrast variation small-angle neutron scattering (CV-SANS). The results show that cyclohexane tends to adsorb near the carbon surface and that both molecules form relatively small domains (<
1 nm)., The Chemical Society of Japan
Chemistry Letters, 2018年 - Time-resolved Total Reflection Detects Mass Transfer along Thickness Direction of Bulk Nafion(R) Film
S. Koizumi; S. Ueda; Y. Noda, Elsevier
Physica B, 2017年12月11日, ［査読有り］ - Preparation of Robust Metal-Free Magnetic Nanoemulsions Encapsulating Low-Molecular-Weight Nitroxide Radicals and Hydrophobic Drugs Directed Toward MRI-Visible Targeted Delivery
Kota Nagura; Yusa Takemoto; Satori Moronaga; Yoshiaki Uchida; Satoshi Shimono; Akihiko Shiino; Kenji Tanigaki; Tsukuru Amano; Fumi Yoshino; Yohei Noda; Satoshi Koizumi; Naoki Komatsu; Tatsuhisa Kato; Jun Yamauchi; Rui Tamura, With a view to developing a theranostic nanomedicine for targeted drug delivery systems visible by magnetic resonance (MR) imaging, robust metal-free magnetic nanoemulsions (mean particle size less than 20nm) consisting of a biocompatible surfactant and hydrophobic, low molecular weight 2,2,5-trimethyl-5-(4-alkoxy)phenylpyrrolidine-N-oxyl radicals were prepared in pH7.4 phosphate-buffered saline (PBS). The structure of the nanoemulsions was characterized by electron paramagnetic resonance spectroscopy, and dynamic light scattering and small-angle neutron-scattering measurements. The nanoemulsions showed high colloidal stability, low cytotoxicity, enough reduction resistance to excess ascorbic acid, and sufficient contrast enhancement in the proton longitudinal relaxation time (T-1) weighted MR images in PBS in vitro (and preliminarily in vivo). Furthermore, the hydrophobic anticancer drug paclitaxel could be encapsulated inside the nanoparticles, and the resulting paclitaxel-loaded nanoemulsions were efficiently incorporated into HeLa cells to suppress cell growth., WILEY-V C H VERLAG GMBH
CHEMISTRY-A EUROPEAN JOURNAL, 2017年11月, ［査読有り］ - Hierarchically Self-Organized Dissipative Structures of Filler Particles in Poly(styrene-ran-butadiene) Rubbers
Daisuke Yamaguchi; Takeshi Yuasa; Takuo Sone; Tetsuo Tominaga; Yohei Noda; Satoshi Koizumi; Takeji Hashimoto, We elucidated the spatial distribution of filler particles in cross-linked polystyrene-ran-butadiene) rubbers (SBR) developed under a typical fillers/rubbers compounding process as one of dissipative structures formed under a stress field imposed on the given system. Two types of fillers and two types of SBR were used to prepare four kinds of the fillers/rubbers composites to investigate effects of specific polymer/filler interactions on the hierarchically self-organized dissipative structures under a given processing condition. The dispersion structures of the filler particles were explored by using the combined small-angle scattering (CSAS) method, which enables the exploration of the structures existing over the wide length scale ranging from similar to 6 nm to similar to 20 mu m. The measured CSAS profiles were analyzed by using a newly developed scattering theory on fractal structures built up by the "cluster" as their lower cutoff objects. This cluster is composed of a few aggregates, defined as the fused primary filler particles, bound by the SBR chains. The scattering from the cluster having characteristic internal structures built up by the fillers and the SBR chains was theoretically formulated by generalizing the Debye-Bueche fluctuation theory for infinite space to the theory for a "confined space" relevant to the cluster size. The dispersion state of the fillers in SBR was clarified on the basis of hierarchical structures consisting of five structure levels as detailed in the text. More specifically, it has the following characteristics depending on the specific interactions: Small, compact clusters build up compact mass-fractal structures, while large, loose clusters build up open mass-fractal structures., AMER CHEMICAL SOC
MACROMOLECULES, 2017年10月, ［査読有り］ - Contrast variation by dynamic nuclear polarization and time-of-flight small-angle neutron scattering. I. Application to industrial multi-component nanocomposites
Yohei Noda; Satoshi Koizumi; Tomomi Masui; Ryo Mashita; Hiroyuki Kishimoto; Daisuke Yamaguchi; Takayuki Kumada; Shin-ichi Takata; Kazuki Ohishi; Jun-ichi Suzuki, Dynamic nuclear polarization (DNP) at low temperature (1.2 K) and high magnetic field (3.3 T) was applied to a contrast variation study in small-angle neutron scattering (SANS) focusing on industrial rubber materials. By varying the scattering contrast by DNP, time-of-flight SANS profiles were obtained at the pulsed neutron source of the Japan Proton Accelerator Research Complex (J-PARC). The concentration of a small organic molecule, (2,2,6,6-tetramethylpiperidine-1-yl) oxy (TEMPO), was carefully controlled by a doping method using vapour sorption into the rubber specimens. With the assistance of microwave irradiation (94 GHz), almost full polarization of the paramagnetic electronic spin of TEMPO was transferred to the spin state of hydrogen (protons) in the rubber materials to obtain a high proton spin polarization (P-H). The following samples were prepared: (i) a binary mixture of styrene-butadiene random copolymer (SBR) with silica particles (SBR/SP); and (ii) a ternary mixture of SBR with silica and carbon black particles (SBR/SP/CP). For the binary mixture (SBR/SP), the intensity of SANS significantly increased or decreased while keeping its q dependence for P-H = -35% or P-H = 40%, respectively. The q behaviour of SANS for the SBR/SP mixture can be reproduced using the form factor of a spherical particle. The intensity at low q (similar to 0.01 angstrom(-1)) varied as a quadratic function of P-H and indicated a minimum value at P(H)z = 30%, which can be explained by the scattering contrast between SP and SBR. The scattering intensity at high q (similar to 0.3 angstrom(-1)) decreased with increasing P-H, which is attributed to the incoherent scattering from hydrogen. For the ternary mixture (SBR/SP/CP), the q behaviour of SANS was varied by changing P-H. At P-H = similar to 35%, the scattering maxima originating from the form factor of SP prevailed, whereas at P-H = 29% and P-H = 38%, the scattering maxima disappeared. After decomposition of the total SANS according to inverse matrix calculations, the partial scattering functions were obtained. The partial scattering function obtained for SP was well reproduced by a spherical form factor and matched the SANS profile for the SBR/SP mixture. The partial scattering function for CP exhibited surface fractal behaviour according to q(-3.6), which is consistent with the results for the SBR/CP mixture., INT UNION CRYSTALLOGRAPHY
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2016年12月, ［査読有り］ - Multi-tube area detector developed for reactor small-angle neutron scattering spectrometer SANS-J-II
Y. Noda; S. Koizumi; D. Yamaguchi, A newly developed multi-tube area detector for a small-angle neutron scattering (SANS) spectrometer (SANS-J-II) at the research reactor JRR-3 in Tokai, Japan, has been implemented via the use of one-dimensional position-sensitive 3 He detectors (tubes). Ninety-six active tubes of 8 mm in diameter and 650 and 580 mm in length were filled with 15 atm (1.52 MPa) of 3 He and aligned vertically parallel in order to cover a sufficiently large area for small-angle scattering measurement. These tubes are enclosed in an air chamber together with neutron encode and GATENET modules (VME boards), which compose a standard data acquisition system for the spallation neutron source of the Japan Proton Accelerator Research Complex. This system facilitates the acquisition of time-of-flight neutron event data. The multi-tube detector is mounted on a truck moving in a vacuum chamber of the SANS spectrometer. After discriminating noise originating from gamma-rays, and calibrating the positions and sensitivities of individual tubes, the resolution was determined (i.e. channel widths along parallel and vertical directions along a tube). The counting rate of one tube was determined to be 1.4 x 10(3) counts per second with a counting loss of 1%. This implies that the new detector, composed of 96 tubes, can detect more than 10(5) neutrons per second with a counting loss of 1%. To demonstrate its use, small-angle scattering originating from a diblock copolymer film with a highly oriented lamellar microdomain was observed. The data acquisition in event mode has a great advantage in time-resolved measurements that are synchronized with external stimuli imposed on a sample., INT UNION CRYSTALLOGRAPHY
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2016年02月, ［査読有り］ - Thermosetting polymer for dynamic nuclear polarization: Solidification of an epoxy resin mixture including TEMPO
Yohei Noda; Takayuki Kumada; Daisuke Yamaguchi; Shin-ichi Shamoto, We investigated the dynamic nuclear polarization (DNP) of typical thermosetting polymers (two-component type epoxy resins; Araldite (R) Standard or Araldite (R) Rapid) doped with a (2,2,6,6-tetra-methylpiperidine-1-yl)oxy (TEMPO) radical. The doping process was developed by carefully considering the decomposition of TEMPO during the solidification of the epoxy resin. The TEMPO electron spin in each two-component paste decayed slowly, which was favorable for our study. Furthermore, despite the dissolved TEMPO, the mixture of the two-component paste successfully solidified. With the resulting TEMPO-doped epoxy-resin samples, DNP experiments at 1.2 K and 3.35 T indicated a magnitude of a proton-spin polarization up to 39%. This polarization is similar to that (35%) obtained for TEMPO-doped polystyrene (PS), which is often used as a standard sample for DNP. To combine this solidification of TEMPO-including mixture with a resin-casting technique enables a creation of polymeric target materials with a precise and complex structure. (C) 2014 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2015年03月, ［査読有り］ - Polarization analysis equipment in SANS-J-II: Study of polymer electrolyte membrane for fuel cell
Y. Noda; D. Yamaguchi; A. Putra; S. Koizumi; Y. Sakaguchi; T. Oku; J. Suzuki, In small angle neutron scattering spectrometer, SANS-J-II at Japan Research Reactor No. 3 (JRR-3), a polarization analysis setup has been equipped, which is composed of transmission-type supermirror polarizer, radial-bender-type supermirror analyzer, pi flipper, and solenoids for generating guide magnetic field. This setup was applied to the structural study of polymer electrolyte membrane, Nafion under water-swollen state. The sample is known to exhibit several characteristic peaks at wide angle region, which is related to water transporting channels. By use of polarization analysis technique, the coherent and incoherent contributions were successfully separated. Consequently, we obtained reliable information about decaying power law of ionic cluster peak and the shape of the broad peak, relating to ordering with short distance (5.6 angstrom). (c) 2012 The Authors. Published by Elsevier B.V., Elsevier
Physics Procedia, 2013年04月01日, ［査読有り］ - Spin contrast variation study of fuel-efficient tire rubber
Yohei Noda; Daisuke Yamaguchi; Takeji Hashimoto; Shin-Ichi Shamoto; Satoshi Koizumi; Takeshi Yuasa; Tetsuo Tominaga; Takuo Sone, The scattering length of a proton against a polarized neutron depends strongly on the polarization of proton spins (PH). This dependence can be utilized for contrast variation in small angle neutron scattering (SANS). We applied this spin contrast variation technique to a silica-filled SBR rubber specimen, which is widely used for tread rubber of fuel-efficient tires. For realizing high PH, we used dynamic nuclear polarization (DNP) technique, in which large polarization of electron spin at low temperature and high magnetic field is transferred to proton spin by microwave irradiation with a tuned frequency. As this electron spin source, we doped stable radical TEMPO (2, 2, 6, 6-tetramethyl piperidine 1-oxyl) into the rubber sample by use of a vapor sorption technique. For the TEMPO-doped rubber sample, SANS measurements were conducted at PH = 20%, 0%, and +13%, with almost fully polarized neutron beam (98.5 %) with its wavelength of 6.5±0.6 Å. The SANS profile clearly changed as a function of PH, which can be explained by the PH dependence of the neutron scattering length densities of the main three components (SBR, silica and zinc oxide). By a linear transformation of the profiles obtained at the three different PH values, we successfully determined the partial scattering function of silica, which reflects the aggregation of silica particles. © 2013 The Authors., Elsevier B.V.
Physics Procedia, 2013年, ［査読有り］ - Dynamic nuclear polarization of electron-beam irradiated polyethylene by pairs of alkyl free radicals
T. Kumada; Y. Noda; N. Ishikawa, Elsevier
Journal of Magnetic Resonance, 2012年03月13日, ［査読有り］ - Inhomogeneous dynamic nuclear polarization of protons in a lamella-forming diblock copolymer investigated by a small-angle neutron scattering method
Yohei Noda; Takayuki Kumada; Takeji Hashimoto; Satoshi Koizumi, By combining two methods of selective doping of paramagnetic species into a microdomain and small-angle neutron scattering (SANS), the spatially inhomogeneous proton polarization created by dynamic nuclear polarization (DNP) has been precisely evaluated. A lamella-forming diblock copolymer composed of polystyrene (PS) and polyisoprene (PI) block chains (PS-b-PI) was employed, the SANS profile of which clearly shows scattering peaks up to the third order due to interlamellar interference. As a source of electron spin for DNP, 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) was doped into one or other of the microdomains; samples with PS or PI microdomains selectively doped with TEMPO are designated PS(center dot)-b-PI and PS-b-PI(center dot), respectively. The SANS intensity at the first-and third-order peaks is well reproduced by assuming that the proton polarization is homogeneous throughout the sample, but that at the second-order peak cannot be explained by this assumption. This anomaly regarding the second-order peak was successfully explained by a model postulating that proton polarization in a doped microdomain decreases with increasing distance from the interface with a neighbouring doped microdomain. The decrease in proton polarization at the centre of a doped microdomain was estimated to be 0.07 (2) for PS-b-PI(center dot) and 0.05 (1) for PS(center dot)-b-PI, relative to constant proton polarization in a doped microdomain. The inhomogeneous proton polarization results from two competing dynamic processes, i.e. spin diffusion from doped to undoped microdomains, and spin lattice relaxation occurring on the pathway of proton spin diffusion., WILEY-BLACKWELL
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2011年06月, ［査読有り］ - Mesoscale spatial distribution of electron spins studied by time-resolved small-angle and ultra-small-angle neutron scattering with dynamic nuclear polarization: A case of 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) doped in high-density polyethylene
T. Kumada; Y. Noda; S. Koizumi; T. Hashimoto, We carried out time-resolved small-angle neutron scattering (SANS) and ultrasmall-angle neutron scattering (USANS) studies of dynamically polarized high-density polyethylene (HDPE) doped with 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) persistent free radicals. We observed a remarkable enhancement of the scattering intensity shortly after a switching of microwave frequency from positive (negative) to negative (positive) dynamic nuclear polarization (DNP). The enhancement was found to be due to spatially heterogeneous proton-spin polarization generated as a result of heterogeneously distributed TEMPO in the HDPE sample. The spatial fluctuation of the polarization ranged up to the length-scale of >= 100 nm. This result strongly suggests that the TEMPO free radicals are localized more in nonfibrils but less in fibrils of HDPE. In this way, we propose that the time-resolved DNP-SANS and DNP-USANS be general techniques to determine mesoscale spatial distribution of electron spins in dielectric materials. (C) 2010 American Institute of Physics. [doi:10.1063/1.3460923], American Institute of Physics
The Journal of Chemical Physics, 2010年08月07日 - Dynamic nuclear polarization study of UV-irradiated butanol for hyperpolarized liquid NMR
T. Kumada; Y. Noda; T. Hashimoto; S. Koizumi, We have carried Out a dynamic nuclear polarization (DNP) Study of proton spins of UV-irradiated solid butanol containing phenol at 0.1-1%. By the aid of butyl free radicals produced by the photolysis, the butanol sample was dynamically polarized up to the polarization of 1.4 +/- 0.1 % at 1.5 K and 1.2 T, which is about 4000 times larger than that at the thermal equilibrium at an ambient temperature. Unlike persistent free radicals such as nitroxy and trityl free radicals commonly used for DNP, the butyl free radicals immediately decay by melting. We propose that free radicals produced by UV-photolysis are applicable to the DNP-enhanced hyperpolarized liquid-state NMR (Ardenkjer-Larsen et al. [6]). The hyperpolarization of the UV-irradiated samples should remain longer than that of the samples having persistent free radicals, because of the absence of the free radicals after the melting in the UV-irradiated samples. (C) 2009 Elsevier Inc. All rights reserved., ACADEMIC PRESS INC ELSEVIER SCIENCE
JOURNAL OF MAGNETIC RESONANCE, 2009年12月, ［査読有り］ - Dynamic nuclear polarization system for the SANS-J-II spectrometer at JAEA
Takayuki Kumada; Yohei Noda; Takeji Hashimoto; Satoshi Koizumi, We have developed a dynamic nuclear polarization (DNP) system for the SANS-J-II spectrometer at the JRR-3 atomic research reactor of Japan Atomic Energy Agency (JAEA). The DNP system is composed of a split-type horizontal superconducting magnet (3.3 T), a Gunn oscillator as a microwave source (94 GHz), and a cryostat (1.2 K). In particular, a sample cell with empty set 40 in inner diameter and the magnet with a field homogeneity of 5 x 10(-5) in a volume of empty set 25 mm x 8 mm were employed to polarize samples with a diameter of empty set 20mm for the ultra small-angle scattering experiment using the magnetic lens installed at the SANS-J-II spectrometer [S. Koizumi, H. Iwase, J. Suzuki, T. Oku, R. Motokawa, H. Sasao, H. Tanaka, D. Yamaguchi, H.M. Shimizu, T. Hashimoto, J. Appl. Crystallogr. 40 (2007) s474]. We obtained the proton polarization |P| = 32% in the polyethylene doped with 2,2,6,6-tetra-methyl-piperidine-1-oxyl (TEMPO). (C) 2009 Elsevier B.V. All rights reserved., ELSEVIER
PHYSICA B-CONDENSED MATTER, 2009年09月, ［査読有り］ - Small-angle neutron scattering study of dynamically polarized polyethylenes
Yohei Noda; Takayuki Kumada; Takeji Hashimoto; Satoshi Koizumi, We carried out a small-angle neutron scattering (SANS) study of dynamically polarized polyethylene (PE) samples doped with 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO). The transmission of the PE with almost fully polarized neutrons (98.5%) increased with increasing the proton polarization, P. The incoherent scattering cross section decreased with increasing P. The effect of P on the polarized neutrons' transmission and the incoherent scattering cross section agreed well with the theory. The q-dependence of the coherent scattering, which reflects a two-phase structure of PE composed of crystalline and amorphous domains, was kept unchanged by the proton polarization, but the intensity increased by a factor of 3 and 6 for P = +23% and -23%, respectively. The results mean that the contrast between the two phases was successfully enhanced by a dynamic nuclear polarization (DNP) technique. However, the enhancement is only 1/13-1/16 of the enhancement calculated by assuming a homogeneous polarization through the PE sample. The discrepancy suggests that P in amorphous domains (25%) should be higher than that in crystalline domains (22%) by 3%, which in turn may suggest the partial depolarization of proton spins on the way of the spin diffusion from amorphous domains, where TEMPO radicals localize, to crystalline domains. (C) 2009 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
PHYSICA B-CONDENSED MATTER, 2009年09月, ［査読有り］ - Dynamic nuclear polarization of high- and low-crystallinity polyethylenes
Takayuki Kumada; Noda Yohei; Takeji Hashimoto; Satoshi Koizumi, We carried out a dynamic nuclear polarization (DNP) study of high- and low-crystallinity polyethylene films defined as HPE and LPE, respectively, which were doped with TEMPO (2,2,6,6-tetra-methylpiperidine-1-oxyl) by the same amount (1 x 10(19) spins/cm(3)). The proton polarization of 32 +/- 3% was obtained for LPE and 23 +/- 4% for HPE at 3.35 T and 1.4 K. With increase in the concentration of TEMPO, the electron spin resonance (ESR) linewidth of TEMPO in HPE increased more steeply than that in LPE, indicating that TEMPO did not incorporated into the crystalline part, and was localized only at the amorphous part, hence the local concentration of TEMPO in the amorphous regions of HPE varied more steeply than that of LPE with the net amount of TEMPO fed into the film. We suggest that the smaller nuclear polarization for HPE is related to the localization of TEMPO in the smaller amorphous regions. (C) 2009 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2009年07月, ［査読有り］
MISC
- Preparation and characterization of MRI-visible nitride-based nano emulsions encapsulating hydrophobic fluorophores or drugs
K. Nagura; K. Sakamoto; S. Moronaga; A. Bogdanov; N. Chumakova; A.K. Vorobiev; H. Imai; T. Matsuda; A. Shiino; T. Amano; F. Yoshino; Y. Noda; S. Koizumi; S. Shimono; Y. Uchida; T. Kato; N. Komatsu; R. Tamura
第八回ナノカーボンバイオシンポジウム, 2018年09月 - Preparation and characterization of MRI-visible theranostic metal-free magnetic nanoparticles
K. Nagura; Y. Takemoto; S. Moronaga; S. Shimono; Y. Uchida; H. Imai; T. Matsuda; A. Shiino; K. Tanigaki; T. Amano; F. Yoshino; Y. Noda; S. Koizumi; T. Kato; N. Komatsu; R. Tamura
日本化学会第98回春季年会, 2018年03月 - 水素核スピン偏極によるコントラスト変調中性子小角散乱:バウンドラバーの精密構造解析
能田洋平; 吉田幸彦; 小泉智; 増井友美; 間下亮; 尾藤容正; 岸本浩通; 山口大輔; 熊田高之; 高田慎一; 大石一城; 鈴木淳市
高分子学会予稿集(CD-ROM), 2017年09月06日 - 大強度陽子加速器の中性子小角散乱の最新
小泉 智、能田 洋平
高分子, 2017年07月24日, ［査読有り］, ［招待有り］ - 水素核スピン偏極によるコントラスト変調中性子小角散乱―フィラー粒子周辺におけるバウンドラバー空間分布の評価
能田洋平; 吉田幸彦; 小泉智; 増井友美; 間下亮; 尾藤容正; 岸本浩通; 山口大輔; 熊田高之; 高田慎一; 大石一城; 鈴木淳市
高分子学会予稿集(CD-ROM), 2017年05月15日 - スピンコントラスト中性子実験に向けた安定常磁性ラジカル添加試料と電子線照射試料における動的核偏極挙動の研究
熊田高之; 能田洋平; 石川法人
日本物理学会講演概要集(CD-ROM), 2016年09月23日 - 水素核スピン偏極によるコントラスト変調中性子小角散乱―タイヤゴム材料のナノ構造解析への応用
能田洋平; 小泉智; 増井友美; 間下亮; 尾藤容正; 岸本浩通; 山口大輔; 熊田高之; 高田慎一; 大石一城; 鈴木淳市
高分子学会予稿集(CD-ROM), 2016年08月24日 - 動的核スピン偏極法によるコントラスト変調中性子小角散乱 J-PARC飛行時間法の場合
能田洋平・小泉智・増井友美・間下亮・岸本浩通・山口大輔・熊田高之・高田慎一・大石一城・鈴木淳市
日本中性子科学会誌「波紋」, 2015年08月15日 - 3He中性子偏極フィルターの開発状況と今後の計画
奥隆之; 酒井健二; 廣井孝介; 篠原武尚; 相澤一也; 加倉井和久; 吉良弘; 林田洋寿; 桐山孝治; 鈴木淳市; 猪野隆; 大河原学; 能田洋平; 大山研司
日本中性子科学会年会講演概要集, 2015年 - 水素核スピン偏極コントラスト変調SANSの高度化とJ‐PARCへの展開
能田洋平; 山口大輔; 社本真一; 橋本竹治; 熊田高之; 高田慎一; 小泉智; 大石一城; 鈴木淳市; 増井友美; 間下亮; 岸本浩通
日本中性子科学会年会講演概要集, 2014年 - 中性子小角散乱装置SANS‐J‐IIにおける3Heスピンフィルターを用いた偏極解析
坂口佳史; 吉良弘; 奥隆之; 篠原武尚; 鈴木淳市; 酒井健二; 中村充孝; 相澤一也; 新井正敏; 能田洋平; 小泉智; 武田全康; 遠藤康夫; CHANG L.J; 有本靖; 猪野隆; 清水裕彦; 神山崇; 大山研司; 平賀晴弘; 堤健之; 山田和芳; 加倉井和久
日本中性子科学会年会講演概要集, 2010年 - 動的核スピン偏極と中性子小角散乱法を用いた,放射線照射により固体中に生じるスパー,ブロブ,トラックの構造研究
熊田高之; 能田洋平; 橋本竹治; 小泉智; 石川法人; 大原宏太
日本物理学会講演概要集, 2009年03月03日
書籍等出版物
講演・口頭発表等
- 核スピン偏極コントラスト変調 中性子小角散乱（DNP-SANS）の 毛髪繊維への応用
能田洋平; 小泉智; 前田知貴; 天谷美奈子; 小木達也
繊維学会秋季研究発表会, 2023年11月18日 - ダメージ処理毛髪の微細構造内水分布のDNP-SANSによる研究
能田洋平; 小泉智; 前田知貴; 石原綾
JSNS2023, 2023年09月13日 - 動的核スピン偏極コントラスト変調中性子小角散乱法による毛髪繊維微細構造内の水分布の研究
能田洋平; 小泉智; 前田知貴; 稲田拓実; 石原綾
中性子産業利用報告会, 2023年07月14日 - 動的核スピン偏極コントラスト変調中性子小角散乱法による毛髪繊維微細構造内水分布の研究
能田洋平; 小泉智; 前田知貴; 稲田拓実; 石原綾
第72回高分子学会年次大会, 2023年05月25日 - 高圧印加の中性子小角散乱による燃料電池触媒層の空隙の観察
小泉智; 能田洋平; 照沼壱正
第72回高分子学会年次大会, 2023年05月25日 - 核スピン偏極コントラスト変調中性子小角散乱による毛髪繊維の微細構造解析
能田洋平、小泉智、前田知貴、稲田拓実、石原綾、井上宏之
JSNS2022, 2022年10月28日, 日本中性子科学会
20221026, 20221028 - iMATERIAにおけるマルチスケール構造測定システムの構築
高橋東之、市村英聖、深谷奈菜、稲田拓実、能田洋平、小泉智
JSNS2022, 2022年10月27日, 日本中性子科学会
20221026, 20221028 - 小型中性子源小角散乱装置ib-SASと新しい小角散乱の計測法
小泉智、能田洋平、大竹淑恵、小林知洋
JSNS2022, 2022年10月27日, 日本中性子科学会
20221026, 20221028 - Water distribution in human hair fiber, analysis by DNP-SANS approach
Yohei Noda; Satoshi Koizumi; Tomoki Maeda; Takumi Inada; Aya Ishihara; Hiroyuki Inoue
高分子討論会, 2022年09月06日, 高分子学会
20220905, 20220907 - Crosslink of SBR rubber investigated by DNP SANS
Satoshi Koizumi; Yohei Noda; Tomomi Masui; Hiroyuki Kishimoto
第71回高分子討論会, 2022年09月06日, 高分子学会
20220905, 20220907 - Water in nafion investigated by DNP SANS
Satoshi Koizumi; Yohei Noda; Takumi Inada; Tomoki Maeda; Henrich Frielinghaus
第71回高分子討論会, 2022年09月06日, 高分子学会
20220905, 20220907 - DNP SANS study of water distribution in hair fiber microstructure at swollen state
Yohei Noda; Satoshi Koizumi; Tomoki Maeda; Takumi Inada; Mitsuki Tanaka; Aya Ishihara; Hiroyuki Inoue
第71回高分子学会年次大会, 2022年05月26日, 高分子学会
20220525, 20220527 - 時分割中性子小角散乱法によるシャンプー泡のその場観察
鬼澤岬、小泉智、前田知貴、能田洋平
令和３年度繊維学会秋季研究発表会, 2021年11月19日, 繊維学会
20211118, 20211119 - 中性子線を用いた時分割小角散乱による絹糸の乾燥過程の定量評価
令和３年度繊維学会秋季研究発表会, 2021年11月18日, 繊維学会
20211118, 20211119 - 製品そのものを見る動的核スピン偏極の現状と今後
能田洋平
「中性子産業利用の研究会」令和３年度第２回iMATERIA研究会, 2021年09月21日, 茨城県中性子利用研究会
20210921, 20210921 - 動的核スピン偏極コントラスト変調法による毛髪繊維微細構造内の水分布評価
Y. Noda; S. Koizumi; T. Maeda; T. Inada; M. Tanaka; A. Ishihara; and H. Inoue
第70回高分子討論会, 2021年09月08日, 高分子学会
20210906, 20210908 - パルス中性子線による結城紬の湿潤、乾燥過程のその場観察
S. Koizumi; M. Tanaka; Y. Noda; T. Maeda; M. Shinozuka; and M. Nakano
第70回高分子討論会, 2021年09月06日, 高分子学会
20210906, 20210908 - DNP-SANS study on micro-structure of human hair fiber
Y. Noda; S. Koizumi; T. Maeda; T. Inada; M. Tanaka; A. Ishihara; and H. Inoue
第70回高分子学会年次大会, 2021年05月27日, 高分子学会
20210526, 20210528 - 動的核スピン偏極コントラスト変調法による架橋構造の定量化
能田洋平、小泉智、増井友美、岸本浩通、前田知貴
第69回高分子討論会, 2020年09月17日, 高分子学会
20200916, 20200918 - Contrast variation SANS by DNP - Crosslink structure in vulcanized rubbers
Y. Noda; S. Koizumi; T. Masui; H. Kishimoto; and T. Maeda
第69回高分子学会年次大会, 2020年05月27日, 高分子学会
20200527, 20200527 - Contrast variation small angle neutron scattering using proton spin polarization at SANS spectrometer iMATERIA(BL20), J-PARC
Y. Noda; T. Maeda; T. Oku; S. Koizumi; T. Masui; and H. Kishimoto
MATERIALS RESEARCH MEETING 2019, 2019年12月11日, Materials research Society of Japan, ［招待有り］
20191210, 20191214 - 茨城県材料構造解析装置iMATERIAにおける動的核スピン偏極コントラスト変調中性子小角散乱のゴム材料への応用
能田洋平、前田知貴、奥隆之、小泉智、増井友美、岸本浩通
第68回高分子討論会, 2019年09月27日, 高分子学会 - iMATERIAにおけるDNP-SANSの開発と性能
能田洋平
令和元年度ソフトマター中性子散乱研究会・第2回iMATERIA研究会, 2019年08月21日, 中性子産業利用推進協議会・茨城県中性子利用研究会 - 茨城県材料構造解析装置iMATERIAにおける動的核スピン偏極コントラスト変調中性子小角散乱実験
能田洋平、前田知貴、奥隆之、小泉智
第68回高分子学会年次大会, 2019年05月30日, 高分子学会 - DNP用7T超電導マグネットの成果と今後の計画
能田洋平
平成30年度ソフトマター中性子散乱研究会・第3回iMATERIA研究会, 2018年12月25日, 中性子産業利用推進協議会・茨城県中性子利用研究会 - 動的核スピン偏極法によるコントラスト変調 - 産業利用への展開 -
能田洋平
日本中性子科学会 第18回年会, 2018年12月04日, 日本中性子科学会 - Development of dynamic nuclear polarization equipment for contrast variation SANS experiment
Y. Noda; S. Koizumi
XVII International Small Angle Scattering Conference, 2018年10月08日, Argonne National Laboratory - Dynamic nuclear polarization instrument for contrast variation experiment at iMATERIA in J-PARC MLF
Y. Noda; S. Koizumi
Quantum Beam Science in Biology and Soft Materials, 2018年05月31日, 茨城大学量子線科学専攻 - Development of dynamic nuclear polarization instrument for contrast variation neutron scattering experiment at iMATERIA
Y. Noda; Y. Yoshida; S. Koizumi
第67回高分子学会年次大会, 2018年05月23日, 高分子学会 - 水素核スピン偏極によるコントラスト変調中性子小角散乱 バウンドラバーの精密構造解析
能田 洋平、吉田 幸彦、小泉 智、増井 友美、間下 亮、尾藤 容正、岸本 浩通、山口 大輔、熊田 高之、高田 慎一、大石 一城、鈴木 淳市
第66回高分子討論会, 2017年09月20日, 高分子学会 - Contrast variation SANS by proton spin polarization: application to industrial rubber materials
Yohei Noda; Yukihiko Yoshida; Satoshi Koizumi; Tomomi Masui; Ryo Mashita; Yasumasa Bito; Hiroyuki Kishimoto; Daisuke Yamaguchi; Takayuki Kumada; Shin-ichi Takata; Kazuki Ohishi; Jun-ichi Suzuki
NOP 2017, 2017年07月06日 - 水素核スピン偏極によるコントラスト変調中性子小角散乱―フィラー粒子周辺におけるバウンドラバー空間分布の評価
能田 洋平、吉田 幸彦、小泉 智、増井 友美、間下 亮、尾藤 容正、岸本 浩通、山口 大輔、熊田 高之、高田 慎一、大石 一城、鈴木 淳市
第66回高分子年次大会, 2017年05月29日, 高分子学会 - 水素核スピン偏極によるコントラスト変調中性子小角散乱－タイヤゴム材料ナノ構造解析への応用事例－
能田洋平
CROSS roads Workshop, 2016年06月15日, CROSS - Spin contrast variation study of fuel-efficient tire rubber
Y. Noda; S. Koizumi; T. Masui; R. Mashita; H. Kishimoto; D. Yamaguchi; T. Kumada; S. Takata; K. Ohishi; J. Suzuki
Soft Matter & Neutrons GO Energy, 2015年10月08日, Julich Research Center - The first experiment of spin contrast variation at J-PARC BL15 TAIKAN
Y. Noda; S. Koizumi; T. Masui; R. Mashita; H. Kishimoto; D. Yamaguchi; T. Kumada; S. Takata; K. Ohishi; J. Suzuki
SAS 2015, 2015年09月16日, International Union of Crystallography - 水素核スピン偏極コントラスト変調SANSの高度化とJ-PARCへの展開
能田洋平・山口大輔・社本真一・橋本竹治・熊田高之・高田慎一・小泉 智・大石一城・鈴木淳市・増井友美・間下 亮・岸本浩通
日本中性子科学会第14回年会, 2014年12月12日, 日本中性子科学会 - Recent upgrade of dynamic nuclear polarization system in JAEA for neutron scattering contrast variation studies
Yohei Noda
PNCMI 2014, 2012年09月18日, Aistralian Nuclear Science and Technology Organization
共同研究・競争的資金等の研究課題
