Masayuki AOSHIMAAssociate Professor
■Researcher basic information
Organization
- Graduate School of Education（Course for Professional degree ） Division of Professional Teacher Education Professional Course in School Subjects
- College of Education Training Course for School Teachers Program for Subject Education ／ Major in Science Education
- Faculty of Education Domain of Language, Social,& Natural Sciences
Research Areas
Educational Background
- 01 Apr. 1998 - 31 May 1999, Chiba University, Graduate School, Division of National Science and Technology, 物質高次科学専攻
- Apr. 1998 - May 1999, Chiba University, Graduate School, Division of National Science and Technology, 物質高次科学専攻
- 01 Apr. 1996 - 31 Mar. 1998, Chiba University, Graduate School, Division of National Science and Technology, 理化学専攻
- Apr. 1996 - Mar. 1998, Chiba University, Graduate School, Division of National Science and Technology, 理化学専攻
- Apr. 1991 - Mar. 1995, Chiba University, Faculty of Science, 化学科
■Research activity information
Paper
- 棒状粗大ヘマタイト粒子分散系の粒子径分布に対する原料塩化鉄濃度の影響
大森花歩; 南雲小徹; 青島政之, Corresponding
茨城大学教育学部紀要（自然科学）, Mar. 2025 - NaH2PO4濃度が双四角錐型ヘマタイト粒子の粒子径分布に与える影響
鶴岡勇大・青島政之, Corresponding, 茨城大学教育学部
茨城大学教育学部紀要（自然科学）, 10 Mar. 2023 - 安定な二酸化マンガンコロイド分散系の調整方法
花澤洸樹・青島政之, Corresponding, 茨城大学教育学部
茨城大学教育学部紀要（自然科学）, 10 Mar. 2023 - 対流熱伝達の理解を促す新教材の開発
鶴岡勇大・青島政之, Corresponding, 茨城大学教育学部
茨城大学教育学部紀要（教育科学）, 10 Mar. 2023 - Button Magnet-induced Ring-like Light Reflection from a Fluid Surface of Platelet Hematite Particles Dispersion
Kakeru Oomori; Masayuki Aoshima, Last, 茨城大学教育学部
茨城大学教育学部紀要（自然科学）, Jan. 2022 - Comparison of Particle Size Effect on Light Reflection Properties of Platelet Hematite Particles Dispersion System
Mayu Watanabe; Shun Kinbara and Masayuki Aoshima, Last, College of Education, Ibaraki University
Bulletin of the College of Education, Ibaraki University (Natural Science), Jan. 2021 - Particle Size Distributions for Platelet Hematite Particles Analyzed from Scanning Electron Microscopy Images
Aika Hori and Masayuki Aoshima, Last, College of Education, Ibaraki University
Bulletin of the College of Education, Ibaraki University (Natural Science), Jan. 2021 - Influence of Classification Method by Means of Gravity Sedimentation on Particle Size Distributions of Cubic Hematite Particles
Yudai Tsuruoka and Masayuki Aoshima, Last, College of Education, Ibaraki University
Bulletin of the College of Education, Ibaraki University (Natural Science), Jan. 2021 - Experiments to Confirm the Fact that Dry Call Batteries are Actually not Dry
Shunsuke Kawarai and Masayuki Aoshima, Last, College of Education, Ibaraki University
Bulletin of the College of Education, Ibaraki University (Educational Science), Jan. 2020 - Comparison of Particle Size Distributions for Cubic Hematite Particles Obtained from Different Scanning Electron Microscope Images
Temma Mashiko and Masayuki Aoshima, Last, College of Education, Ibaraki University
Bulletin of the College of Education, Ibaraki University (Natural Science), Jan. 2020 - Development of an Experimental Equipment for Applying an Uniform Magnetic Field on the Plate-like Hematite Particles Dispersion
Ryo Takakura and Masayuki Aoshima, Last, College of Education, Ibaraki University
Bulletin of the College of Education, Ibaraki University (Natural Science), Jan. 2020 - Light-Reflective Property of Plate-Like Hematite Particles
Yuri Nagashima; and Masayuki Aoshima, Last, College of Education, Ibaraki University
Bulletin of the College of Education, Ibaraki University (Natural Science), 26 Jan. 2019 - Aggregation Phenomena of Cubic Hematite Particles in a Vertical Magnetic Field
Tomoyuki Kira; and Masayuki Aoshima, Last, College of Education, Ibaraki University
Bulletin of the College of Education, Ibaraki University (Natural Science), 26 Jan. 2019 - A hybrid of brownian dynamics and lattice Boltzmann methods for simulating the activation of Brownian motion of magnetic particles
Akira Satoh; Masayuki Aoshima, Corresponding, The validity of a hybrid of Brownian dynamics and lattice Boltzmann methods for simulating the activation of Brownian motion of magnetic particles in suspension was examined. In this method, random forces were added to the equations of motion of magnetic particles in the usual Brownian dynamics. In order to activate the Brownian motion at a physically reasonable level, a viscosity-modifying method was introduced in adjusting the random displacements of the particles. The main results obtained are summarized as follows. The aggregate structures of magnetic particles were in good agreement with the results of the Monte Carlo method, and the pair correlation functions agreed well with the Monte Carlo results both qualitatively and quantitatively: the Monte Carlo method is a well-established method and is regarded as yielding theoretical solutions. The magnetization curves were also in good agreement with Monte Carlo results, and this verifies that the rotational Brownian motion is activated at a physically reasonable level. The viscosity- modifying coefficients were almost independent of the strengths of the magnetic particle-particle and the particle-field interactions, and also of the volumetric fraction. From these results, we conclude that the present hybrid simulation method has potential for investigating the behavior of magnetic particles in a non-uniform applied magnetic field and in a general flow field. © 2013 The Society of Chemical Engineers, Japan., 化学工学会
Kagaku Kogaku Ronbunshu, 20 Nov. 2013, [Reviewed] - On the Magneto-Rheological Effect of a Suspension Composed of Ferromagnetic Rod-Like Particles by Means of Brownian Dynamics Simulations
Masayuki Aoshima; Akira Satoh, The influences of an external magnetic field and a simple shear flow on rheological properties of colloidal dispersions composed of ferromagnetic rod-like particles were investigated by means of Brownian dynamics simulations. The ferromagnetic rod-like particles were modeled as a spherocylinders with magnetic charges on each hemisphere of the particles. The external magnetic field was applied along the direction normal to the shear plane. The net viscosity was decomposed into three components for detailed discussion: these three viscosity components arise from (a) the torque due to the magnetic particle-field interaction, and (b) the torque and (c) the force due to the interaction between particles. The main results were as follows. Under a relatively weak shear flow field, the viscosity increases significantly with increasing the magnetic particle-particle interaction. This is because chain-like clusters formed in the direction of the field induce a large resistance in a flow field. In contrast, when the flow field is dominant, the strong flow field collapses the chain-like clusters and the viscosity decreases., SOC CHEMICAL ENG JAPAN
KAGAKU KOGAKU RONBUNSHU, 2013, [Reviewed] - Structural Analysis of Self-Assembled Lattice Structures Composed of Cubic Hematite Particles
Masayuki Aoshima; Masataka Ozaki; Akira Satoh, The structural analysis of self-assembled layers with lattice-like structures composed of cubic hematite particles with a side length of approximately 0.9 mu m was carried out by means of radial distribution functions (RDFs). The cubic particles were synthesized by aging a solution of FeCl3 for 8 days at 373 K. The RDFs were determined by a digital image analysis method from direct optical microscope observation of the particles. Two-dimensional (2D) Monte Carlo simulations of the cubic hematite particles were also carried out to clarify the influences of a magnetic field on the lattice structure. In very weak geomagnetic fields, clusters with square lattice structures are formed on a glass plate through the particle sedimentation process. It is clear from the simulation results that the square lattice structures are stabilized by the closed orientation of the magnetic moments of the particles. A broack houlder appeared at a slightly longer distance from the first peak position in the experimental RDF for relatively strong magnetic fields, corresponding to the two split small peaks that appeared in the simulated RDF for an ideal monodisperse system, suggesting that oblique lattice structures with magnetic moments aligned to the field direction are formed to minimize the magnetic potential energy., AMER CHEMICAL SOC
JOURNAL OF PHYSICAL CHEMISTRY C, Aug. 2012, [Reviewed] - Negative magneto-rheological effect of a dispersion composed of spindle-like hematite particles
Yasuhiro Sakuda; Masayuki Aoshima; Akira Satoh, We have experimentally investigated the negative magneto-rheological effect that is theoretically predicted to appear in a dispersion composed of spindle-like hematite (alpha-Fe2O3) particles. The spindle-like hematite particles were synthesized by aging a solution of FeCl3 and KH2PO4 for 72 h at 373 K. The particle size distribution was determined by digital image analysis from electronic microscope observation of the particles. In the present study we considered a glycerol-water-based dispersion in order to clarify the influence of the shear rate and the magnetic field strength on the negative magneto-rheological effect. Measurement of the viscosity was carried out using a rotational-type rheometer in an external magnetic field generated by Helmholtz coils. The main results obtained can be summarized as follows. The viscosity of a hematite/glycerol-water dispersion relative to that with no applied magnetic field decreases with increasing magnetic field strength: that is, we observed the negative viscosity effect that has previously been predicted from theoretical considerations. Moreover, the negative magneto-rheological effect is observed to decrease with increasing shear rate, which also agrees qualitatively with the theoretical prediction., TAYLOR & FRANCIS LTD
MOLECULAR PHYSICS, 2012, [Reviewed] - Negative Magneto-Rheological Effect of a Dispersion Composed of Spindle-Like Hematite Particles
Yasuhiro Sakuda; Masayuki Aoshima; Akira Satoh, Corresponding, We have investigated the negative magneto-rheological effect of a dispersion composed of spindle-like hematite (α-Fe2O 3) particles by means of the experimental method. The spindle-like hematite particles were synthesized by aging a solution of FeCl3 and KH2PO4 for 72 hours at 373K. The particle size distribution was determined by a digital image analysis method from the electronic microscope observation of the particles. In the present study we have considered a glycerol-water-based dispersion in order to clarify the influences of the shear rate and the magnetic field strength on the negative magneto-rheological effect. The measurement of the viscosity was carried out using the rotational-type rheometer in an external magnetic field generated by the Helmholtz coils. The main results obtained here are summarized as follows. The viscosity of hematite/glycerol-water dispersions relative to that for no applied magnetic field case decreases with increasing magnetic field strength: that is, the negative viscosity certainly occurs, as theoretically predicted. Moreover, this negative magneto-rheological effect tends to decrease with increasing shear rate, which also qualitatively agrees with the theoretical prediction. © 2011 The Japan Society of Mechanical Engineers., Japan Society of Mechanical Engineers
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, 25 Nov. 2011, [Reviewed] - 3D Monte Carlo simulations of a magnetic disk-like particle dispersion
Akira Satoh; Masayuki Aoshima, We have investigated the aggregate structures of a colloidal dispersion composed of ferromagnetic disk-like particles with a magnetic moment normal to the particle axis at the particle center, by means of 3D Monte Carlo simulations. Such disk-like particles have been modeled as a circular disk-like particle with the side section shape of spherocylinder. We have attempted to clarify the influences of the magnetic field strength, magnetic interactions between particles and volumetric fraction of particles. In order to discuss quantitatively the aggregate structures of clusters, we have focused on the radial distribution and orientational pair correlation functions, etc. For no applied magnetic field cases, long column-like clusters come to be formed with increasing magnetic particle-particle interactions. The internal structures of these clusters clearly show that the particles incline in a certain direction and their magnetic moments alternate in direction between the neighboring particles in the clusters. For applied magnetic field cases, the magnetic moment of each particle inclines in the magnetic field direction and therefore the column-like clusters are not formed straightforwardly. If the magnetic field is much stronger than magnetic particle-particle interactions, the particles do not have a tendency to form the clusters. As the influence of magnetic particle-particle interactions is significantly strong, thick chain-like clusters or column-like clusters or brick-wall-like clusters come to be formed along the magnetic field direction., SPRINGER
COLLOID AND POLYMER SCIENCE, Jan. 2011, [Reviewed] - キューブ状ヘマタイト粒子からなる自己集合格子構造の解析
青島政之; 尾崎正孝; 佐藤明, Lead
化学工学論文集, 09 Aug. 2010 - Influences of magnetic particle-particle interactions on orientational distributions and rheological properties for a colloidal dispersion composed of rod-like particle with a magnetic moment normal to the particle axis
Ryo Hayasaka; Masayuki Aoshima; Akira Satoh, Corresponding, We have investigated mainly the influences of magnetic particle-particle interactions on the orientational distribution and viscosity of a semi-dense dispersion, which is composed of rod-like particles with a magnetic moment magnetized normal to the particle axis. In addition, the influences of the magnetic field strength, shear rate, and random forces on the orientational distribution and rheological properties have been clarified. The mean field approximation has been applied to take into account magnetic interactions between rodlike particles. The basic equation of the orientational distribution function has been derived from the balance of torques and solved by the numerical analysis method. The results obtained here are summarized as follows. For a strong magnetic field, the rotational motion of the rod-like particle is restricted in a plane normal to the shearing plane since the magnetic moment of the particle is restricted in the magnetic field direction. Under circumstances of a very strong magnetic interaction between particles, the magnetic moment is strongly restricted in the magnetic field direction, so that the particle has a tendency to incline in the flow direction with the magnetic moment pointing to the magnetic field direction. For a strong shear flow, a directional characteristic of rod-like particles is enhanced, and this leads to a more significant one-peak-type distribution of the orientational distribution function. Magnetic interactions between particles do not contribute to the increase in the viscosity because the mean-field vector has only a component along the magnetic field direction. (c) 2008 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
Journal of Magnetism and Magnetic Materials, Aug. 2008, [Reviewed] - Influence of perpendicular external magnetic field on microstructures of monolayer composed of ferromagnetic particles: Analysis by means of quasi-two-dimensional Monte Carlo simulation
Masayuki Aoshima; Akira Satoh; Roy W. Chantrell, We investigated the influences of the magnetic field strength and particle areal density on the microstructure of a quasi-two-dimensional monolayer composed of ferromagnetic particles by means of a Monte Carlo simulation. The magnetic field was applied along a direction perpendicular to the plane of the monolayer. Microstructures of the monolayer obtained in the simulations were analyzed in terms of radial distribution and orientational distribution functions. Formation of the microstructures is discussed from the perspective of particle-particle interaction energy and the perpendicular magnetic susceptibility of the monolayer was calculated from simulated magnetization curves. The obtained results are summarized as follows. For small areal density of particles, formation of chain-like structures is prevented by the repulsive magnetic interaction between particles due to orientations of the magnetic moments in the particles along the magnetic field direction. For intermediate areal density of particles, the chain-like structures remain even when a relatively strong magnetic field is applied, because contributions of the attractive magnetic interactions increase. For large areal density of particles, mixtures of chain-like and locally ordered structures appear due to the anisotropic attractive magnetic interactions in the absence of the magnetic field. However, when a sufficiently strong magnetic field is applied, the magnetic interactions between particles change to isotropic repulsive interactions, which results in the short-range repulsive steric interactions between particles becoming dominant with the appearance of hexagonal close packed structures. (C) 2008 Elsevier Inc. All rights reserved., ACADEMIC PRESS INC ELSEVIER SCIENCE
JOURNAL OF COLLOID AND INTERFACE SCIENCE, Jul. 2008, [Reviewed] - 棒状ヘマタイト粒子からなる非希釈コロイド分散系の配向分布とレオロジー特性に及ぼす粒子間磁気的相互作用の影響―せん断流の回転角速度ベクトル方向に磁場が作用する場合の平均場近似による解析―
早坂良; 青島政之; 鈴木寿則; 佐藤明, Corresponding, The influences of magnetic particle-particle interactions on orientational distributions and viscosity of a semi-dense dispersion composed of rod-like particles with a magnetic moment magnetized normal to the particle axis were investigated. In addition, the influences of the magnetic field strength, shear rate, and random forces on the orientational distribution and rheological properties were clarified. The mean field approximation was applied to take into account magnetic interactions between rod-like particles. The basic equation of the orientational distribution function was derived from the balance of torques and solved by the numerical analysis method. The results obtained are summarized as follows. For a strong magnetic field, the rotational motion of the rod-like particle is restricted in a plane normal to the shearing plane because the magnetic moment of the particle is restricted in the magnetic field direction. When a very strong magnetic interaction exists between particles, the magnetic moment is strongly restricted in the magnetic field direction, so that the particles tend to incline in the flow direction with the magnetic moment aligned with the magnetic field. For a strong shear flow, the directional characteristic of rod-like particles is enhanced, and this leads to a more significant one-peak-type distribution of the orientational distribution function. Magnetic interactions between particles do not contribute to the viscosity because the mean-field vector has only a component in the direction of the magnetic field., The Society of Chemical Engineers, Japan
化学工学論文集, 20 Mar. 2008, [Reviewed] - Influences of magnetic particle-particle interactions on orientational distributions and rheological properties of a semi-dense colloidal dispersion composed of rod-like hematite particles (analysis by means of mean field approximation for an external magnetic field parallel to the angular velocity vector of a simple shear flow)
Ryo Hayasaka; Masayuki Aoshima; Toshinori Suzuki; Akira Satoh, We have investigated mainly the influences of magnetic particle-particle interactions on orientational distributions and viscosity of a semi-dense dispersion, which is composed of rod-like particles with a magnetic moment magnetized normal to the particle axis. In addition, the influences of the magnetic field strength, shear rate, and random forces on the orientational distribution and rheological properties have been clarified. The mean field approximation has been applied to take into account magnetic interactions between rod-like particles. The basic equation of the orientational distribution function has been derived from the balance of torques and solved by the numerical analysis method. The results obtained here are summarized as follows. For a strong magnetic field, the rotational motion of the rod-like particle is restricted in a plane normal to the shearing plane because the magnetic moment of the particle is restricted in the magnetic field direction. Under circumstances of a very strong magnetic interaction between particles, the magnetic moment is strongly restricted in the magnetic field direction, so that the particle has a tendency to incline in the flow direction with the magnetic moment pointing to the magnetic field direction. For a strong shear flow, a directional characteristic of rod-like particles is enhanced, and this leads to a more significant one-peak-type distribution of the orientational distribution function. Magnetic interactions between particles do not contribute to the viscosity because the mean-field vector has only a component along the magnetic field direction. Copyright © 2007 by ASME.
ASME International Mechanical Engineering Congress and Exposition, Proceedings, 2008 - Two-dimensional Monte Carlo simulations of a colloidal dispersion composed of rod-like ferromagnetic particles in an applied magnetic field
Masayuki Aoshima; Akira Satoh, We investigated the influence of an external magnetic field on microstructures in a colloidal dispersion composed of rod-like ferromagnetic particles using the cluster-moving Monte Carlo method. The internal microstructures obtained by simulations have been analysed in terms of the orientational distribution and pair correlation functions. The results obtained are summarized as follows. As the magnetic field increases, the particles align in the direction of the magnetic field. In the case of a relatively strong magnetic interaction between particles, chain-like clusters are formed along the magnetic field direction. However, the aspect ratio of the particles and the magnetic interaction between them do not affect their orientational distribution. Two types of structures are observed in the chain-like clusters - a straight linear structure and a step-like structure. The chain-like clusters become shorter when the area fraction of the particles decreases, and the number of step-like structures increases when the area fraction of the particles increases. The step-like structure formation can be explained by the dependence of the potential energy curves on the shape of the spherocylinder particles., IOP PUBLISHING LTD
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, Jan. 2008, [Reviewed] - 強磁性棒状粒子からなるコロイド分散系の凝集構造に関する2次元モンテカルロ・シミュレーション―外部磁場が作用する場合―
青島政之; 佐藤明, Lead
化学工学論文集, 30 Sep. 2007, [Reviewed] - 強磁性ナノ粒子からなる単層膜のミクロ構造に対する垂直外部磁場の影響—擬 2 次元モンテカルロ・シミュレーションを用いた解析—
青島政之; 佐藤明、Roy W. Chantrell, Lead
化学工学論文集, 14 Jun. 2007, [Reviewed] - ヘマタイト粒子からなる希釈コロイド分散系の配向分布と輸送係数に関する研究
早坂良; 青島政之; 佐藤明; 間島保, Corresponding
化学工学論文集, 22 Jan. 2007, [Reviewed] - Rheological properties and particle behaviors of a nondilute colloidal dispersion composed of ferromagnetic spherocylinder particles subjected to a simple shear flow: Analysis by means of mean-field approximation for the two typical external magnetic field directions
Tomonori Watanabe; Masayuki Aoshima; Akira Satoh, We have analyzed the orientational distributions and rheological properties of a nondilute colloidal dispersion composed of ferromagnetic spherocylinder particles subjected to a simple shear flow. In order to understand the effects of the magnetic interactions between the particles, we have applied the mean-field theory to a nondilute colloidal dispersion for the two typical external magnetic field directions, that is, the direction parallel to the shear flow and the direction parallel to the angular velocity vector of the shear flow. The main results are summarized as follows. The particle-particle interactions suppress the Brownian motion of the particles and, therefore, make the particles incline toward the same direction. For the magnetic direction parallel to the shear flow, the influence of the particle-particle interactions makes the peak of the orientational distribution sharper and higher. The viscosity generally increases as the interactions between particles become stronger in the case where the effects of the shear flow and magnetic field are relatively small. For the magnetic direction parallel to the angular velocity vector of the shear flow, the influence of the particle-particle interactions on the orientational distribution appears significantly, when the influences of the shear flow and magnetic field are not so strong that the particles can be aligned sufficiently to form stable chainlike clusters in a certain direction. (c) 2006 Elsevier Inc. All rights reserved., ACADEMIC PRESS INC ELSEVIER SCIENCE
JOURNAL OF COLLOID AND INTERFACE SCIENCE, Oct. 2006, [Reviewed] - Two-dimensional Monte Carlo simulations of a colloidal dispersion composed of rod-like ferromagnetic particles in the absence of an applied magnetic field
M Aoshima; A Satoh, Influences of the magnetic interaction between particles and the aspect ratio of particles on aggregate structures in a colloidal dispersion composed of rod-like ferromagnetic particles were investigated by means of the cluster-moving Monte Carlo method. The internal structures of the aggregates obtained in simulations were analyzed in terms of the number density distribution of the clusters and radial distribution functions. The results show that as the magnetic interaction between particles increases, many small clusters such as anti-parallel particle pairs, raft-like clusters, and small loop-like clusters are formed; these gather to form larger aggregates. In the case of a relatively strong magnetic interaction between particles, solid-like rectangular clusters are formed when the aspect ratio is approximately 2, since the suitable distance between magnetic charges enables particles to form a fundamental structure of two normal anti-parallel particle pairs. As the aspect ratio increases beyond 2, many more stable raft-like clusters are formed, since the increase in distance between magnetic charges makes the two normal anti-parallel particle pair structures unstable. For a significantly larger aspect ratio, large network microstructures are produced by the formation of many chain-like and loop-like structures. (c) 2005 Elsevier Inc. All rights reserved., ACADEMIC PRESS INC ELSEVIER SCIENCE
JOURNAL OF COLLOID AND INTERFACE SCIENCE, Jan. 2006, [Reviewed] - 強磁性棒状粒子からなるコロイド分散系の凝集構造に関する2次元モンテカルロ・シミュレーション―外部磁場が作用しない場合―
青島政之; 佐藤明, Lead, We have investigated the influences of the magnetic interaction between particles and the aspect ratio of particles on aggregate structures in a colloidal dispersion composed of rod-like ferromagnetic particles by means of the cluster-moving Monte Carlo method. The internal structures of the aggregates obtained by simulations were analyzed in terms of the number density distributions of clusters and the radial distribution functions. The results obtained here are summarized as follows. As the magnetic interaction between particles increases, many small clusters such as pairs of anti-parallel particles, raft-like clusters, and small loop-like clusters are formed; these gather to form larger aggregates. In the case of a relatively strong magnetic interaction between particles, solid-like rectangular clusters are formed when the aspect ratio is approximately 2, since the suitable distance between magnetic charges enables particles to form a fundamental structure of normal pairs of anti-parallel particles. As the aspect ratio increases beyond 2, many more stable raft-like clusters are formed, since the increase in distance between magnetic charges makes the structure of the normal pairs of anti-parallel particles unstable. For a significantly larger aspect ratio, large network microstructures are produced by the formation of many chain-like and loop-like structures., The Society of Chemical Engineers, Japan
化学工学論文集, 2006, [Reviewed] - Two-dimensional Monte Carlo simulations of a colloidal dispersion composed of polydisperse ferromagnetic particles in an applied magnetic field
M Aoshima; A Satoh, We have investigated aggregation phenomena in a polydisperse colloidal dispersion of ferromagnetic particles simulated by employing the cluster-moving Monte Carlo method in an applied magnetic field. The influence of both particle-particle and particle-field interactions on the aggregate structures is analyzed in terms of a pair correlation function. The results obtained in this study are summarized as follows: Under a strong magnetic field, chainlike clusters are formed along the magnetic field direction, and they become thickly clustered with an increase in the strength of the external magnetic field. Moreover, the thickly clustered chains are formed for a polydisperse system that has a large standard deviation of particle diameters. In contrast, for a very weak magnetic field, the strong interaction between the larger particles gives rise to the formation of various shapes in the chainlike clusters, including bending, looping, and branching. With an increase in the external magnetic field, these structures reorganize to form straight chainlike clusters. Furthermore, the thickness of the chainlike clusters for the polydisperse system is found to depend on the standard deviation of the particle-size distribution but is found to be independent of the magnetic field strength. (c) 2005 Elsevier Inc. All rights reserved., ACADEMIC PRESS INC ELSEVIER SCIENCE
JOURNAL OF COLLOID AND INTERFACE SCIENCE, Aug. 2005, [Reviewed] - Two-dimensional Monte Carlo simulations of a polydisperse colloidal dispersion composed of ferromagnetic particles
Masayuki Aoshima; Akira Satoh
AIChE Annual Meeting, Conference Proceedings, 2005 - 強磁性棒状粒子からなる非希釈コロイド分散系の単純せん断流中における配向分布に関する研究―せん断流の回転角速度ベクトルと外部磁場の方向が同一である場合の平均場近似を用いた理論解析―
渡辺知規; 青島政之; 佐藤明, Corresponding, We have analyzed the orientational distributions of a nondilute colloidal dispersion composed of ferromagnetic spherocylinder particles subjected to a simple shear flow. We applied the mean-field theory to the system for an external magnetic field parallel to the angular velocity vector of the shear flow in order to understand the effects of the interactions among the particles. We conclude that the interactions suppress the Brownian motion of the particles and, therefore, make the particles incline toward the same direction. Although the interactions of the particles work in the nondilute colloidal dispersion system, the magnetic field and the shear flow dominantly affect the orientational distributions of the system for an external magnetic field parallel to the angular velocity vector of the shear flow. The particles incline toward the magnetic direction as the strength of the magnetic field increases., The Society of Chemical Engineers, Japan
化学工学論文集, 2005, [Reviewed] - Two-dimensional Monte Carlo simulations of a polydisperse colloidal dispersion composed of ferromagnetic particles for the case of no external magnetic field
M Aoshima; A Satoh, We have investiated the aggregation phenomena in a polydisperse colloidal dispersion composed of ferromagnetic particles by means of the cluster-movin Monte Carlo method. The results have been compared with those for a monodispersc system. The internal structures of aggregates have been analyzed in terms of the radial distribution function in order to clarify the quantitative differences in the internal Structures of clusters. In addition, the Cluster size distribution and angular distribution function have been investigated. The results obtained in the present study are summarized as follows. In a monodisperse system, open necklacelike Clusters are formed and they extend with increasing strength of the magnetic particle-particle interaction. In a polydisperse system with a small standard deviation in the particle size distribution, sigma = 0.2, larger necklacelike Clusters are formed and some looplike clusters can also be observed. In a polydisperse system with a larger standard deviation, sigma=0.35, clumplike clusters are formed for a weak magnetic particle-particle interaction. For a stronger magnetic interaction, larger size clusters that exhibit a complicated network Structure are formed. These complicated Cluster formations found in a polydisperse system are mainly due to the effect of the presence of larger particles. (C) 2004 Elsevier Inc. All rights reserved., ACADEMIC PRESS INC ELSEVIER SCIENCE
JOURNAL OF COLLOID AND INTERFACE SCIENCE, Dec. 2004 - 単純せん断流中における強磁性棒状粒子からなる非希釈コロイド分散系の配向分布とレオロジー特性
渡辺知規; 青島政之; 佐藤明; 間島保, We analyze the orientational distributions and rheological properties of a non-dilute colloidal dispersion composed of the ferromagnetic spherocylinder particles subjected to a simple shear flow. We show how to apply the mean-field theory to the system for an external magnetic field parallel to the shear flow in order to understand the effects of the interactions among the particles. We conclude that the interactions suppress the Brownian motion of the particles and, therefore, make the particles incline toward the same direction. The viscosity increases when the interactions among particles become stronger in the case where the effects of the Brownian motion and the shear flow are relatively small., The Japan Society of Mechanical Engineers
日本機械学会論文集（B編）, 01 Mar. 2004, [Reviewed] - 粒子径分布を考慮した強磁性コロイド分散系の凝集構造に関する2次元モンテカルロ・シミュレーション—外部磁場が作用する場合—
青島 政之; 佐藤 明, Lead, Aggregate structures of a colloidal dispersion composed of polydisperse ferromagnetic particles were investigated by the cluster-moving Monte Carlo method. The internal structure of aggregates was analyzed quantitatively by means of the pair correlation function. The results obtained here are summarized as follows. Under the influence of a strong magnetic field, chain-like clusters are formed in the direction of the magnetic field and become longer and thicker as the magnetic interactions between particles increase. Also, thicker chain-like clusters are formed for a wider distribution of particle diameters. For the very weak external magnetic field, chain-like clusters are formed that have bend-like, small loop-like and branch-like structures. These structures are induced by the interactions between large particles. As the influence of the magnetic field dominates, these structures appear less and less, until straight chain-like clusters are formed in the direction of the magnetic field. The thickness of the clusters does not significantly depend on the strength of the magnetic field but on the distribution of particle diameters., The Society of Chemical Engineers, Japan
化学工学論文集, 2004, [Reviewed] - 粒子径分布を考慮した強磁性コロイド分散系の凝集構造に関する2次元モンテカルロ・シミュレーション―外部磁場が作用しない場合―
青島政之; 佐藤明, Aggregate structures of a colloidal dispersion composed of monodisperse and polydisperse ferromagnetic particles were simulated by the cluster-moving Monte Carlo method. The internal structure of aggregates was analyzed by means of the radial distribution function, and the cluster size distributions and angular distribution functions were investigated. The results obtained are summarized as follows. In the monodispersive system, chain-like clusters are formed and become longer as the magnetic particle-particle interactions increase. In the polydispersive system, chain-like, ring-like and lump-like clusters are formed. As the magnetic interactions increase further, these clusters gather and form larger clusters which have a network structure. This is mainly induced by the influence of larger particles which have stronger magnetic interactions., The Society of Chemical Engineers, Japan
化学工学論文集, Sep. 2003, [Reviewed] - Rheological properties and orientational distributions of dilute ferromagnetic spherocylinder particle dispersions Part II. Analysis for the two typical magnetic field directions
M Aoshima; A Satoh; RW Chantrell; GN Coverdale, We have investigated the orientational distributions and rheological properties of dilute colloidal dispersions, which consist of ferromagnetic spherocylinder particles. First, the governing equation of the orientational distribution function has been derived for the typical two cases of magnetic field directions: the direction parallel to the shear flow and the direction parallel to the angular velocity vector of the shear flow. The equation has been solved approximately by Galerkin's method. With these numerical solutions we have obtained the results of the orientational distribution and viscosity. The results obtained for the magnetic field in the shear flow direction are summarized as follows. In the case of a weak magnetic field, the particle tends to orient nearly toward the shear flow direction and its opposite direction. As the magnetic field increases, the orientation of the particle is restricted and the viscosity increases significantly. As the influence of the magnetic field becomes dominant, an overshoot in the viscosity curve appears. This is due to the fact that there is a maximum deviation of the averaged particle direction from the magnetic field direction. When the strength of the magnetic field increases significantly, the particle inclines close to the magnetic field direction and the viscosity converges to a constant value. Particles with a larger aspect ratio give rise to a larger increment in the viscosity since such elongated particles induce larger resistance in a flow field. We also have obtained results for the case of the magnetic field in the direction parallel to the angular velocity vector of the shear flow. When the flow field is dominant over both the rotational Brownian motion and the magnetic interaction, the particle rotates in the plane nearly perpendicular to the magnetic field direction. As the magnetic field increases, the particle inclines toward the magnetic direction. For this direction of field, the viscosity is independent of the magnetic field and is always zero. (C) 2002 Elsevier Science (USA)., ACADEMIC PRESS INC ELSEVIER SCIENCE
JOURNAL OF COLLOID AND INTERFACE SCIENCE, Sep. 2002, [Reviewed] - 単純せん断流中における強磁性棒状粒子の配向分布に関する研究―磁場がせん断流の回転角速度ベクトルと同方向の場合の理論解析―
青島政之; 佐藤明
化学工学論文集, 02 Mar. 2001, [Reviewed] - 単純せん断流中における強磁性棒状粒子の配向分布に関する研究―せん断流と磁場が同方向の場合の理論解析―
青島政之; 佐藤明, Lead
化学工学論文集, 19 Feb. 2001, [Reviewed] - Orientational distributions of a ferromagnetic spherocylinder particle in a simple shear flow - Analysis for a magnetic field parallel to the angular velocity vector of a shear flow
Masayuki Aoshima; Akira Satoh; Geoff N. Coverdale; Roy W. Chantrell, We have investigated the orientational distribution of a dilute colloidal dispersion of ferromagnetic spherocylinder particles for the case of a steady simple shear flow in a magnetic field parallel to the angular velocity vector of the shear flow. The results obtained are summarized as follows. When the flow field is dominant compared with the Brownian motion and the magnetic interactions, the particles rotate in the plane perpendicular to the magnetic field direction. As the magnetic field increases, the particles incline towards the magnetic direction, so that the viscosity is independent of the magnetic field and is zero., Society of Chemical Engineers, Japan
Kagaku Kogaku Ronbunshu, 2001, [Reviewed] - Orientational distributions of a ferromagnetic spherocylinder particle in a simple shear flow - Analysis for a magnetic field parallel to a shear flow direction
Masayuki Aoshima; Akira Satoh; Geoff N. Coverdale; Roy W. Chantrell, We have studied the orientational distributions and rheological properties of dilute colloidal dispersions consisting of ferromagnetic spherocylinder particles, for the case of a steady simple shear flow in a magnetic field parallel to the shear flow direction. The equation governing the orientational distribution function was first derived, and it was then solved approximately by Galerkin's method. With these numerical solutions, we obtained the results of the orientational distribution and viscosity. In the case of a weak magnetic field, the particles tend to orient in two mutually opposite directions. As the magnetic field increases, the rotation of the particles is restricted and the viscosity increases significantly. As the influence of the magnetic field becomes dominant, an overshoot in the viscosity curve appears. This is because there is a maximum deviation of the averaged particle direction from the magnetic field direction. When the strength of the magnetic field increases overwhelmingly, the particle inclines close to the magnetic field direction and the viscosity converges to a constant value. The particle of a larger aspect ratio leads to the larger increment in the viscosity, since such elongated particles induce larger resistance in a flow field., Society of Chemical Engineers, Japan
Kagaku Kogaku Ronbunshu, 2001, [Reviewed] - Absorption, distribution, metabolism and excretion of [14C]levocetirizine, the R enantiomer of cetirizine, in healthy volunteers
Masayuki Aoshima; Kiyotake Fukasawa; Katsumi Kaneko, The main goal of the present study was to investigate the absorption and disposition of levocetirizine dihydrochloride, the R enantiomer of cetirizine dihydrochloride, following a single oral administration (5 mg) of the 14C-labelled compound in healthy volunteers. Configurational stability was also investigated. Levocetirizine was rapidly and extensively absorbed: 85.4% and 12.9% of the radioactive dose were recovered 168 h post-dose in urine and faeces, respectively. Levocetirizine and/or its metabolites were not, or only very poorly, associated with blood cells, as the blood-to-plasma ratio was 0.51 to 0.68. The mean apparent volume of distribution (Vz/F) was 26.9 l (0.3 l/kg) indicating that the distribution of levocetirizine is restrictive. The protein binding of radiolabelled levocetirizine was 96.1% 1 h after administration. In vitro, at concentrations ranging from 0.2 μg/ml to 1 μg/ml, the protein binding was 94.8% to 95.0%. Levocetirizine is very poorly metabolised. The cumulative 48-h excretion as parent compound accounted for 85.8% of the oral dose, equivalent to 95% of the total radioactivity excreted at this time. At least 13 minor metabolites were detected in urine and represented 2.4% of the dose at 48 h. The metabolic pathways involved in levocetirizine metabolism are oxidation (hydroxylation, O-dealkylation, N-oxidation and N-dealkylation), glucuroconjugation, taurine conjugation and glutathione conjugation with formation of the mercapturic acids. There was no evidence of chiral inversion of levocetirizine in humans. This result is consistent with that obtained in preclinical studies.
European Journal of Clinical Pharmacology, 2001, [Reviewed] - Micropore size distribution of activated carbon fiber using the density functional theory and other methods
Mustapha El-Merraoui; Masayuki Aoshima; Katsumi Kaneko, The pore-size distribution of a series of pitch-based activated carbon fiber samples (A5, A10, A15, and A20) has been determined from the nitrogen adsorption isotherms at 77 K, with the nonlocal density functional theory (DFT), the Dubinin-Stoeckli (DS) method, and the subtracting pore effect (SPE) method using the high-resolution αs plot. The pore-size distributions of all the samples from DFT show a distinguishable peak at small pore widths around 0.6 nm and a broad peak at bigger micropore size. The mean pore widths obtained from DFT and DS methods are similar for samples whose pores are narrow and different for wider ones. The use of the SPE method shows that the mean pore widths are slightly smaller than those obtained by DFT and DS methods., ACS
Langmuir, 02 May 2000, [Reviewed] - Micropore Filling of Supercritical Xe in Micropores of Activated Carbon Fibers
Masayuki Aoshima; Kiyotake Fukasawa; and Katsumi Kaneko, Lead, The adsorption isotherms of Xe vapor at 196 K and supercritical Xe at 300 K on activated carbon fibers of different pore widths were gravimetrically measured. The adsorption isotherms of Xe vapor were compared with the N-2 adsorption isotherms, A Dubinin-Radushkevich (DR) plot of the adsorption isotherms of Xe vapor showed a good linearity, indicating that Xe vapor is adsorbed by the representative micropore filling mechanism. The adsorption isotherms of supercritical Xe were approximated by the Langmuir equation. The saturated adsorption amounts of supercritical Xe, W-L, were in the range of 0.14 to 0.22 ml g(-1). The adsorption isotherms of supercritical Xe were described by the supercritical DR equation, which provides the quasisaturated vapor pressure P-0q. Both P-0q, and W-L lead to the reduced isotherm, which can describe three isotherms, The obtained reduced isotherm derived from the isotherms of supercritical Xe could describe even those of Xe vapor. Hence, both Xe vapor and supercritical Xe should be adsorbed by the same mechanism. The isosteric heat of Xe adsorption was greater than the enthalpy of vaporization of Xe by more than 12 kJ mol(-1). These results suggest that Xe molecules are stabilized in the form of a cluster in micropores even at 300 K. (C) 2000 academic Press., ACADEMIC PRESS INC
Journal of Colloid and Interface Science, 2000, [Reviewed] - Molecular association-mediated micropore filling of supercritical Xe in a graphite slit pore by grand canonical Monte Carlo simulation
Masayuki Aoshima; Takaomi Suzuki; Katumi Kaneko, Lead
Chemical Physics Letters, 24 Jun. 1999, [Reviewed]
MISC
Books and other publications
Lectures, oral presentations, etc.
- Synthesis of Magnetic Micro-mirrors
青島 政之; 長島 友里; 呉 浩怡; 王 正明
The 69th Divisional Meeting of Division of Colloid and Surface Chemistry, 18 Sep. 2018, The Division of Colloid and Surface Chemistry, The Chemical Society of Japan - 垂直磁場による磁性キューブ状粒子の再配列現象
吉良知之; 青島政之
第28回日本化学会関東支部茨城地区研究交流会, 01 Dec. 2017, 日本化学会関東支部 - 光反射特性を有する板状ヘマタイトコロド分散系の磁場応答
長島友里; 青島政之
第28回日本化学会関東支部茨城地区研究交流会, 01 Dec. 2017, 日本化学会関東支部 - 磁気粘性流体への応用を目指したNi-Auナノロッド分散系の調製
青島政之; 佐藤明
第64回コロイドおよび界面化学討論会, 20 Sep. 2013, 日本化学会 - 針状ヘマタイト粒子からなる分散系の逆磁気粘性効果
作田康裕; 青島政之; 佐藤明
日本機械学会第90期流体工学部門講演会, 18 Sep. 2012 - Influence of magnetic particle-particle interactions on viscosity of a suspension composed of ferromagnetic rod-like particles
Masayuki Aoshima; Akira Satoh
International Association of Colloid and Interface Scientists, 18 May 2012, The Chemical Society of Japan - Influences of external magnetic and gravity fields on self-assembly lattice structures composed of cubic hematite particles
Masayuki Aoshima; Yuki Satoh; Akira Satoh
AIChE Annual Meeting, 21 Oct. 2011, American Institute of Chemical Engineers - キューブ状へマタイト粒子からなる自己集合格子構造に対する外部磁場と重力の影響
佐藤友輝; 青島政之; 佐藤明
第63回コロイドおよび界面化学討論会, 09 Sep. 2011, 日本化学会 - 強磁性棒状粒子からなるコロイド分散系のブラウン動力学シミュレーション
青島政之; 佐藤明
第63回コロイドおよび界面化学討論会, 09 Sep. 2011, 日本化学会 - 3D Monte Carlo Simulations of Aggregate Structures in a Magnetic Colloidal Suspension Composed of Plate-like Particles with Magnetic Moment Normal to the Particle Axis
Yasuhiro Sakuda; Masayuki Aoshima and Akira Satoh
ASME International Mechanical Engineering Congress and Exposition, 17 Nov. 2010, American Society of Mechanical Engineers - Analysis of Self-assembly Lattice Structures composed of Cubic Hematite Particles
Masayuki Aoshima; Masataka Ozaki; Akira Satoh
International Conference on Nanoscopic Colloid and Surface Science, 21 Sep. 2010 - 自己集合にもとづくキューブ状ヘマタイト粒子の２次元格子状構造形成
青島政之; 尾崎正孝; 佐藤明
日本化学会第90春季年会, 26 Mar. 2010 - Hexagonal-Square Lattice Phase Transition in 2D Colloidal Monolayer Induced by Steric Layer Potentials: Analysis by Means of Monte Carlo Simulations
Masayuki Aoshima; Akira Satoh and Roy W. Chantrell
Australian Colloid and Interface Symposium, 04 Feb. 2009 - 界面活性剤層ポテンシャルに起因する2次元コロイド粒子単層膜の六方-正方格子構造相転移が圧力-面積等温線に与える影響：モンテカルロ・シミュレーションによる解析
青島政之; 佐藤明; Roy W. Chantrell
第61回コロイドおよび界面化学討論会, 08 Sep. 2008 - Influences of Magnetic Particle-Particle Interactions on Orientational Distributions and Rheological Properties of a Semi-Dense Colloidal Dispersion composed of Rod-like Hematite Particles (Analysis by Means of Mean Field Approximation for an External Mag
Ryo Hayasaka; Masayuki Aoshima; Takahiro Suzuki; Akira Satoh
ASME International Mechanical Engineering Congress and Exposition, 14 Nov. 2007 - Influences of Magnetic Particle-Particle Interactions on Orientational Distributions and Rheological Properties of a Semi-Dense Colloidal Dispersion composed of Rod-like Hematite Particles (Analysis by Means of Mean Field Approximation for an External Magnetic Field parallel to the Angular Velocity Vector of a Simple Shear Flow)
Ryo Hayasaka; Masayuki Aoshima; Takahiro Suzuki; Akira Satoh
ASME International Mechanical Engineering Congress and Exposition, 14 Nov. 2007 - Influence of a Longitudinal External Magnetic Field on Microstructures of a Monolayer composed of Ferromagnetic Nanoparticles: Analysis by Means of Monte Carlo Simulations
Masayuki Aoshima; Akira Satoh and Roy W. Chantrell
52nd Magnetism and Magnetic Materials Conference, 08 Nov. 2007 - 強磁性ナノ粒子からなる単層膜のミクロ構造に対する垂直外部磁場の影響 ―擬2次元モンテカルロ・シミュレーションを用いた解析―
青島政之; 佐藤明、Roy W. Chantrell
第60回コロイドおよび界面化学討論会, 21 Sep. 2007 - Two-Dimensional Monte Carlo Simulations of Self-assembly Clusters Composed of Rod-like Ferromagnetic Particles
Masayuki Aoshima and Akira Satoh
Australian Colloid and Interface Symposium, 05 Feb. 2007 - 強磁性棒状粒子からなるコロイド分散系の凝集構造に関する2次元モンテカルロ・シミュレーション ―外部磁場が作用する場合―
青島政之; 佐藤明
第59回コロイドおよび界面化学討論会, 13 Sep. 2006 - 電界共役流体のマイクロジェット流の特徴
佐久間博臣; 青島政之; 佐藤明
日本機械学会東北支部 第41期総会・講演会, 14 Mar. 2006, 日本機械学会 - Two-Dimensional Monte Carlo Simulations of a Polydisperse Colloidal Dispersion Composed of Ferromagnetic Particles
Masayuki Aoshima and Akira Satoh
AIChE Annual Meeting, 04 Nov. 2005 - 強磁性棒状粒子からなるコロイド分散系の凝集構造に関する2次元モンテカルロ・シミュレーション ―外部磁場が作用しない場合―
青島政之; 佐藤明
第58回コロイドおよび界面化学討論会, 10 Sep. 2005 - 強磁性棒状粒子からなる分散系に関するcluster-movingモンテカルロシミュレーション法の検討
青島政之; 佐久間博臣; 佐藤明
日本機械学会東北支部第40季秋季講演会, 17 Sep. 2004, 日本機械学会 - 粒子径分布を考慮した強磁性コロイド分散系の凝集構造に関する2次元モンテカルロ・シミュレーション－外部磁場が作用する場合－
青島政之; 佐藤明
第57回コロイドおよび界面化学討論会, 11 Sep. 2004 - 粒子径分布を考慮した強磁性コロイド分散系の凝集構造に関する2次元モンテカルロ・シミュレーション（外部磁場が作用しない場合）
青島政之; 佐藤明
日本化学会第83春季年会, 18 Mar. 2003 - Orientational Distributions of a Ferromagnetic Spherocylinder Particle in a Simple Shear Flow
Masayuki Aoshima; Akira Satoh; Geoff N. Coverdale; Roy W. Chantrell
ASME International Mechanical Engineering Congress & Exposition, 20 Nov. 2002 - 単純せん断流中における強磁性棒状粒子の配向分布に関する研究
青島政之; 佐藤明; Geoff; N. Coverdale; Roy W. Chantrell
第54回コロイドおよび界面化学討論会, 18 Sep. 2001 - Micropore Width Distribution of Activated Carbon Fiber with GCMC Simulation-assisted Xe Adsorption
Masayuki Aoshima; Katsumi Kaneko
7th International Conference on Fundamentals of Adsorption, 23 May 2001 - Adsorbed states of supercritical Xe in micropores with cluster analysis
Masayuki Aoshima; Takaomi Suzuki and Katsumi Kaneko
24th Biennial Conference on Carbon’99, 14 Jul. 1999 - クラスタ解析法によるミクロ孔中での超臨界Xeの吸着状態
青島政之; 鈴木孝臣; 金子克美
日本化学会第76春季年会, Mar. 1999 - GCMCシミュレーションによるグラファイトスリット孔への分子会合関与型Ｘｅミクロポアフィリング
青島政之; 鈴木孝臣; 金子克美
日本化学会第74春季年会, Mar. 1998 - Dimer-mediated Micropore Filling of Xe in a carbon nanospace
Masayuki Aoshima; Takaomi Suzuki and Katsumi Kaneko
23rd Biennial Conference on Carbon’97, 20 Jul. 1997 - Simulation of Xe adsorption on a Graphite-slit Pore
Masayuki Aoshima; Takaomi Suzuki; Kastumi Kaneko
Pacific Basin Workshop on adsorption science and technology, 09 May 1997 - グラファイトミクロ孔へのＸｅ吸着シミュレーション
青島政之; 飯山拓; 鈴木孝臣; 金子克美
日本化学会第72春季年会, Mar. 1997 - Ｘ線回折による液体表面構造
青島政之; 飯山拓; 鈴木孝臣; 金子克美
日本化学会第70春季年会, Mar. 1996 - 低入射角Ｘ線回折法による水表面層の構造
青島政之; 飯山拓; 金子克美
第48回コロイドおよび界面化学討論会, Oct. 1995
Research Themes
- Investigation of the peculiar functional characteristics of hematite particle suspensions and development of the method of controlling the characteristic properties
Grant-in-Aid for Scientific Research (B)
Akita Prefectural University
01 Apr. 2011 - 31 Mar. 2015 - Development of the method of activating the Brownian motion and its application to a magnetic particle dispersion
Grant-in-Aid for Scientific Research (B)
Akita Prefectural University
2008 - 2010 - Structural Analysis Calculations of Two-Dimensional Monolayer composed of Magnetic Nanoparticles prepared by Surface Pressure and External Magnetic Field Assisted Self-Assembly Processes
Grant-in-Aid for Young Scientists (B)
Akita Prefectural University
2007 - 2008 - Computational Chemistry on Internal Structures and Rheological Properties of Functional Colloids in Non-equilibrium Fields
Grant-in-Aid for Scientific Research (C)
Akita Prefectural University
2003 - 2004 - Computational Chemistry on Dynamic Properties of Ferromagnetic Colloidal Dispersions by Means of Stokesian Dynamics Method
Grant-in-Aid for Scientific Research (C)
Akita Prefectural University
2000 - 2001
Social Contribution Activities
- いばらきサイエンスキッズ育成事業「オンラインミニ博士によるミニ学会」助言・指導
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茨城県教育委員会, 16 Nov. 2024 - いばらきサイエンスキッズ育成事業「オンライン科学自由研究相談会」助言・指導
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茨城県教育委員会, 01 Aug. 2024 - 科学の甲子園ジュニアの問題点検
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茨城県教育委員会, 06 Jun. 2024 - いばらきサイエンスキッズ育成事業「オンラインミニ博士によるミニ学会」助言・指導
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茨城県教育委員会, 18 Nov. 2023 - いばらきサイエンスキッズ育成事業「オンライン科学自由研究相談会」助言・指導
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茨城県教育委員会, 31 Jul. 2023 - 科学の甲子園ジュニアの問題点検
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茨城県教育委員会, 08 Jun. 2023 - いばらきサイエンスキッズ育成事業「オンラインミニ博士によるミニ学会」助言・指導
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茨城県教育委員会, 19 Nov. 2022 - いばらきサイエンスキッズ育成事業「オンライン科学自由研究相談会」助言・指導
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茨城県教育委員会, 29 Jul. 2022 - 科学の甲子園ジュニアの問題点検
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茨城県教育委員会, 10 Jun. 2022 - いばらきサイエンスキッズ育成事業「オンラインミニ博士によるミニ学会」助言・指導
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茨城県教育委員会, 21 Nov. 2021 - いばらきサイエンスキッズ育成事業「オンライン科学自由研究相談会」助言・指導
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茨城県教育委員会, 29 Jul. 2021 - サイエンスキッズ育成事業「オンライン科学自由研究相談会」助言・指導
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茨城県教育委員会, 29 Jul. 2021 - 科学の甲子園ジュニアの問題点検
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茨城県教育委員会, 09 Jun. 2021 - 第１９回青少年のための科学の祭典日立大会 出展「シュワシュワ！入浴剤」
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第１９回青少年のための科学の祭典日立大会, 01 Dec. 2019 - 01 Dec. 2019 - 科学の甲子園ジュニアの問題点検
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茨城県教育委員会, 22 May 2019 - 第１８回青少年のための科学の祭典日立大会 出展「シュワシュワ！入浴剤」
lecturer
第１８回青少年のための科学の祭典日立大会, 02 Dec. 2018 - 02 Dec. 2018 - いばらき理科推進事業 「科学自由研究発表会」助言・指導 ミュージーアムパーク茨城県自然博物館
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茨城県教育委員会, 28 Oct. 2018 - 28 Oct. 2018 - いばらき理科推進事業「科学自由研究の指導」，県西生涯学習センター
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茨城県教育委員会, 03 Aug. 2018 - いばらき理科教育推進事業 理科指導力向上研修「水溶液における溶解と化学変化」
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茨城県教育委員会, 31 Jul. 2018 - いばらき理科推進事業「科学の甲子園ジュニア茨城県大会実行委員」
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茨城県教育委員会, 06 Jun. 2018 - いばらき理科推進事業 小学校教科担任制推進地域モデル小学校公開授業研究会，筑西市立古里小学校
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26 Oct. 2017 - いばらき理科推進事業 「科学自由研究発表会」助言・指導 ミュージーアムパーク茨城県自然博物館
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22 Oct. 2017 - いばらき理科教育推進事業 実験実技研修「水溶液における溶解と化学変化」
lecturer
18 Aug. 2017 - いばらき理科推進事業「科学自由研究の指導」，女性プラザ
advisor
01 Aug. 2017 - いばらき理科推進事業 小学校教科担任制推進地域モデル小学校公開授業研究会，稲敷市立新利根小学校
advisor
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04 Aug. 2015 - いばらき理科教育推進事業「科学自由研究の指導（探求基礎）」県西生涯学習センター
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01 Aug. 2014
