Updated on 2024/05/11

写真a

 
NAKAMURA Yuka
 
Organization
Academic Assembly Institute of Science and Technology JOUHOU DENSHI KOUGAKU KEIRETU Assistant Professor
Faculty of Engineering Department of Engineering Assistant Professor
Title
Assistant Professor
External link

Degree

  • 博士（理学） ( 2015.9   九州大学 )

Research Interests

  • 非平衡

  • 拡散

  • 分子クラウディング

  • 溶媒和

  • 計算機シミュレーション

  • 特異摂動

  • 境界層

  • 液体

Research Areas

  • Nanotechnology/Materials / Fundamental physical chemistry

  • Natural Science / Biophysics, chemical physics and soft matter physics

Research History

  • Niigata University   Faculty of Engineering Department of Engineering   Assistant Professor

    2020.3

Professional Memberships

 

Papers

  • Nonadditivities of the Particle Sizes Hidden in Model Pair Potentials and Their Effects on Physical Adsorptions Reviewed

    Ken Ichi Amano, Satoshi Furukawa, Yuto Kubo, Yuka Nakamura, Rina Ishii, Ayane Tanase, Masahiro Maebayashi, Tomohiko Hayashi, Naoya Nishi, Tetsuo Sakka

    Langmuir   39 ( 37 )   12999 - 13007   2023.9

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    Publishing type：Research paper (scientific journal)  

    It is important to understand the mechanism of colloidal particle assembly near a substrate for development of drug delivery systems, micro-/nanorobots, batteries, heterogeneous catalysts, paints, and cosmetics. Understanding the mechanism is also important for crystallization of the colloidal particles and proteins. In this study, we calculated the physical adsorption of colloidal particles on a flat wall mainly using the integral equation theory, wherein small and large colloidal particles were employed. In the calculation system, like-charged electric double-layer potentials were used as pair potentials. In some cases, it was found that the small particles are more easily adsorbed. This result is unusual from the viewpoint of the Asakura-Oosawa theory, and we call it a “reversal phenomenon”. Theoretical analysis revealed that the reversal phenomenon originates from the nonadditivities of the particle sizes. Using the knowledge obtained from this study, we invented a method to analyze the size nonadditivity hidden in model pair potentials. The method will be useful for confirmation of various simulation results regarding the adsorption and development of force fields for colloidal particles, proteins, and solutes.

    DOI： 10.1021/acs.langmuir.3c00968

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  • A Microscopic Theory for Preferential Solvation Effects on Viscosity Reviewed

    Shota Arai, Akira Yoshimori, Yuka Nakamura, Ryo Akiyama

    Journal of the Physical Society of Japan   91 ( 9 )   2022.9

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    Publishing type：Research paper (scientific journal)   Publisher：Physical Society of Japan  

    DOI： 10.7566/JPSJ.91.094602

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  • Solvation effects on diffusion processes of a macromolecule: Accuracy required for radial distribution function to calculate diffusion coefficient Reviewed International journal

    Yuka Nakamura, Akira Yoshimori, Ryo Akiyama

    JOURNAL OF CHEMICAL PHYSICS   154 ( 154 )   084501 - 084501   2021.2

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    We investigate the dependence of the diffusion coefficient of a large solute particle on the solvation structure around a solute. The diffusion coefficient of a hard-sphere system is calculated by using a perturbation theory of large-particle diffusion with radial distribution functions around the solute. To obtain the radial distribution function, some integral equation theories are examined, such as the Percus-Yevick (PY), hypernetted-chain (HNC), and modified HNC theories using a bridge function proposed by Kinoshita (MHNC) closures. In one-component solvent systems, the diffusion coefficient depends on the first-minimum value of the radial distribution function. The results of the MHNC closure are in good agreement with those of calculation using the radial distribution functions of Monte Carlo simulations since the MHNC closure very closely reproduces the radial distribution function of Monte Carlo simulations. In binary-solvent mixtures, the diffusion coefficient is affected by the larger solvent density distribution in the short-range part, particularly the height and sharpness of the first peak and the depth of the first minimum. Since the HNC closure gives the first peak that is higher and sharper than that of the MHNC closure, the calculated diffusion coefficient is smaller than the MHNC closure result. In contrast, the results of the PY closure are qualitatively and quantitatively different from those of the MHNC and HNC closures.

    DOI： 10.1063/5.0038894

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  • Dynamical scaling analysis on critical universality class for fully frustrated XY models in two dimensions Reviewed

    Yukiyasu Ozeki, Yuri Yajima, Yuka Nakamura

    PHYSICAL REVIEW B   101 ( 9 )   2020.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER PHYSICAL SOC  

    Critical properties of the fully frustrated XY models on square and triangular lattices are investigated by means of the nonequilibrium relaxation (NER) method. We examine the validity of the conclusion on the universality class of the chiral transition previously obtained by the NER method, in which that belongs to a non-Isingtype one. To clarify it, we analyze the NER of fluctuations for longer Monte Carlo steps on lager lattices than those performed previously. The calculation is made at the chiral transition temperatures estimated carefully by the use of recently improved dynamical scaling analysis. The result indicates that the asymptotic behavior of the time-dependent exponents, which should converge to the critical exponents, show the same tendency as those obtained previously in shorter times. We also apply the improved dynamical scaling analysis to the estimation of Kosterlitz-Thouless (KT) transitions and confirm the existence of the double transitions for the chiral and KT phases with more reliable estimations.

    DOI： 10.1103/PhysRevB.101.094437

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  • Reduced density profile of small particles near a large particle: Results of an integral equation theory with an accurate bridge function and a Monte Carlo simulation Reviewed

    Yuka Nakamura, Shota Arai, Masahiro Kinoshita, Akira Yoshimori, Ryo Akiyama

    JOURNAL OF CHEMICAL PHYSICS   151 ( 4 )   2019.7

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

    Solute-solvent reduced density profiles of hard-sphere fluids were calculated by using several integral equation theories for liquids. The traditional closures, Percus-Yevick (PY) and the hypernetted-chain (HNC) closures, as well as the theories with bridge functions, Verlet, Duh-Henderson, and Kinoshita (named MHNC), were used for the calculation. In this paper, a one-solute hard-sphere was immersed in a one-component hard-sphere solvent and various size ratios were examined. The profiles between the solute and solvent particles were compared with those calculated by Monte Carlo simulations. The profiles given by the integral equations with the bridge functions were much more accurate than those calculated by conventional integral equation theories, such as the Ornstein-Zernike (OZ) equation with the PY closure. The accuracy of the MHNC-OZ theory was maintained even when the particle size ratio of solute to solvent was 50. For example, the contact values were 5.7 (Monte Carlo), 5.6 (MHNC), 7.8 (HNC), and 4.5 (PY), and the first minimum values were 0.48 (Monte Carlo), 0.46 (MHNC), 0.54 (HNC), and 0.40 (PY) when the packing fraction of the hard-sphere solvent was 0.38 and the size ratio was 50. The asymptotic decay and the oscillation period for MHNC-OZ were also very accurate, although those given by the HNC-OZ theory were somewhat faster than those obtained by Monte Carlo simulations.

    DOI： 10.1063/1.5100040

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  • Stick boundary condition at large hard sphere arising from effective attraction in binary hard-sphere mixtures Reviewed

    Yuka Nakamura, Akira Yoshimori, Ryo Akiyama, Tsuyoshi Yamaguchi

    JOURNAL OF CHEMICAL PHYSICS   148 ( 12 )   2018.3

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

    We have studied the diffusion of a large hard-sphere solute immersed in binary hard-sphere mixtures. We reveal how the boundary condition at the solute surface is affected by the solvent density around the solute. Solving equations for a binary compressible mixture by perturbation expansions, we obtain the boundary condition depending on the size ratio of binary solvent spheres. When the size ratio is 1: 2, the boundary condition lies close to the slip boundary condition. By contrast, when the size ratio becomes large, the boundary condition approaches the stick boundary condition with the addition of larger solvent spheres. We find that the transition to the stick boundary condition is caused by the increase in the solvent density around the solute due to an entropic effect. Published by AIP Publishing.

    DOI： 10.1063/1.5025202

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  • Effects of the solvation structure on diffusion of a large particle in a binary mixture studied by perturbation theory Reviewed

    Y. Nakamura, A. Yoshimori, R. Akiyama

    JOURNAL OF MOLECULAR LIQUIDS   200   85 - 88   2014.12

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE BV  

    We study the effects of the solvation structure on the diffusion of a large particle in a binary mixture. Using our recently developed perturbation theory, we calculate the diffusion coefficient of a large hard-sphere solute particle immersed in a binary solvent mixture of hard spheres with two different sizes. The calculation results show that the Stokes-Einstein (SE) relation breaks down in the hard-sphere system. When the size ratio of binary solvent spheres is three or more, the deviation from the SE relation increases with the packing fraction of larger solvent spheres. In contrast, at the size ratio of two, the diffusion coefficient approaches the value predicted by the SE relation as larger solvent spheres are added. We show that the large deviation from the SE relation is caused by the high density of larger solvent spheres around the solute sphere. (C) 2014 Elsevier B.V. All rights reserved.

    DOI： 10.1016/j.molliq.2014.06.021

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  • Perturbation Theory of Large-Particle Diffusion in a Binary Solvent Mixture Reviewed

    Yuka Nakamura, Akira Yoshimori, Ryo Akiyama

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   83 ( 6 )   2014.6

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    We study the diffusion of a large spherical particle immersed in a binary compressive liquid mixture using a perturbation theory. We focus on the breakdown of the Stokes-Einstein (SE) relation caused by the microscopic solvation structure of binary solvent particles around a solute particle. In order to consider the solvation structure, we solve multicomponent generalized Langevin equations by singular perturbation expansion. Then, we assume that solvent particles are much smaller than the solute particle. Solving the equations, we express the diffusion coefficient analytically using the radial distribution functions of a binary mixture. The expression shows the breakdown of the SE relation if the density distribution of a binary solvent is inhomogeneous around a solute particle. Actually, we show that the SE relation breaks down when a large hard sphere diffuses in a binary hard-sphere mixture. We observe the large deviation from the SE relation, which is a result specific to the binary solvent.

    DOI： 10.7566/JPSJ.83.064601

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  • A Perturbation Theory for Friction of a Large Particle Immersed in a Binary Solvent Reviewed

    Yuka Nakamura, Akira Yoshimori, Ryo Akiyama

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   81   2012.9

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PHYSICAL SOC JAPAN  

    A new theory of a binary solvent is developed to study the effects of the density of solvent particles around a large solute particle on friction. To develop the theory, the solvent particles are assumed to be much smaller than the solute particle, and then a perturbation expansion is employed. The expansion allows one to derive hydrodynamic equations with boundary conditions on the surface of a solute. The boundary conditions are calculated from the radial distribution functions of a binary solvent. The hydrodynamic equations with the boundary conditions provide an analytical expression for the friction. The developed theory is applied to a binary hard-sphere system. The present theory shows that the friction in the system has larger values than those predicted by the Stokes law.

    DOI： 10.1143/JPSJS.81SA.SA026

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MISC

  • 8pPSB-43 A large particle diffusion and breakdown of the Stokes-Einstein relation : Effects of solute size and solvent density on diffusion coefficient

    Nakamura Yuka, Yoshimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   214 - 214   2014.8

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • 7pAM-8 Effective potential of the depletion force and crystallization

    Suematsu A., Yoshimori A., Akiyama R., Nakamura Y.

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   194 - 194   2014.8

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • 27aAB-9 Studies of crystallization due to depletion effects using effective potential

    Suematsu Ayumi, Yoshimori Akira, Akiyama Ryo, Nakamura Yuka

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   389 - 389   2014.3

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • 27aAB-2 Theory of diffusion for studying effects of solvent granularity

    Nakamura Yuka, Yoshimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   388 - 388   2014.3

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • Depletion effects on phase transition

    Suematsu Ayumi, Yoshimori Akira, Akiyama Ryo, Nakamura Yuka

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   337 - 337   2013.8

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • The effects of packing fraction of solvent particles on large-particle diffusion

    Nakamura Yuka, Yoshimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   68 ( 2 )   322 - 322   2013.8

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • 27aXC-7 Perturbation theory of large-particle diffusion : Comparison with non-perturbative theory

    Nakamura Yuka, Yoshimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   68 ( 1 )   427 - 427   2013.3

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • 19aAB-1 Slip and Stick Boundary Conditions for Diffusion Coefficient and Radial Distribution Function

    Nakamura Yuka, Yoshimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   67 ( 2 )   327 - 327   2012.8

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • 26pAH-2 A new theory of large-particle diffusion : Comparison with another theory

    Inayoshi Yuko, Nakamura Yuka, Yoshimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   67 ( 1 )   411 - 411   2012.3

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • 26pAH-3 Effects of a small amount of co-solvent to diffusion of a large particle

    Nakamura Yuka, Inayoshi Yuko, Yosimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   67 ( 1 )   412 - 412   2012.3

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

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  • A Perturbation Theory for Friction of a Large Particle Immersed in a Binary Solvent (Proceedings of the 5th Mini-Symposium on Liquids : Fundamental Problems on Liquids and Related Topics)

    Journal of the Physical Society of Japan   81   SA026 - 1-7   2012

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    Language：English   Publisher：Physical Society of Japan  

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  • 21pJF-6 Theory of friction of a large particle from a binary solvent and the application

    Nakamura Yuka, Yoshimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   308 - 308   2011.8

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  • 26pPSB-21 Theory of friction of a large particle from multi-component solvents

    Nakamura Yuka, Yoshimori Akira, Akiyama Ryo

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   399 - 399   2011.3

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Presentations

  • コロイド分散系の拡散におけるスティック境界条件の破れ

    中村有花, 吉森明, 秋山良

    日本物理学会2020年秋季大会  2020.9 

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  • 溶媒多成分系における枯渇力と粘性の理論

    荒井翔太, 中村有花, 吉森明, 秋山良

    日本物理学会2020年秋季大会  2020.9 

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  • 2成分溶媒系に溶質を溶かしたときの粘性に対する溶媒組成比の効果

    荒井翔太, 中村有花, 吉森明, 秋山良

    日本物理学会第75回年次大会  2020.3 

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  • Event-chain法による非平衡緩和解析の有効性

    長田優馬, 尾関之康, 中村有花

    日本物理学会第75回年次大会  2020.3 

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  • コロイド分散系での大きな粒子の拡散における摂動理論

    中村有花, 吉森明, 秋山良

    日本物理学会2019年秋季大会  2019.9 

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  • 大きさの違う粒子からなる多成分系の粘性の理論

    荒井翔太, 中村有花, 吉森明, 秋山良

    日本物理学会2019年秋季大会  2019.9 

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  • コロイド分散系における粒子の拡散に対する密度分布の効果

    中村有花, 吉森明, 秋山良

    日本物理学会第74回年次大会  2019.3 

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  • Reduced density profile of small solvent particles near a large solute particle

    Yuka Nakamura, Shota Arai, Masahiro Kinoshita, Akira Yoshimori, Ryo Akiyama

    Joint Conference of EMLG/JMLG Meeting 2018  2018.11 

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  • 剛体球系の動径分布関数から計算する大きな粒子の拡散係数

    中村有花, 吉森明, 秋山良, 荒井翔太, 木下正弘

    日本物理学会2018年秋季大会  2018.9 

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  • 大きさの異なる粒子を含む剛体球系の動径分布関数

    中村有花, 荒井翔太, 吉森明, 秋山良, 木下正弘

    日本物理学会2018年秋季大会  2018.9 

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  • Radial distribution functions for hard sphere fluid calculated by MC and integral equation theory with a bridge function

    Y. Nakamura, S. Arai, A. Yoshimori, M. Kinoshita, R. Akiyama

    The 12th Mini-Symposium on Liquids  2018.6 

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  • Diffusion coefficient of a large particle calculated by radial distribution functions in hard-sphere systems

    Y. Nakamura, A. Yoshimori, S. Arai, M. Kinoshita, R. Akiyama

    The 12th Mini-Symposium on Liquids  2018.6 

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  • 溶媒の密度分布で決まる粒子表面の境界条件

    中村有花, 吉森明, 秋山良, 山口毅

    日本物理学会第73回年次大会  2018.3 

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  • Solvation Effects on Diffusion of Macromolecule

    Y. Nakamura, A. Yoshimori, R. Akiyama, T. Yamaguchi

    The 16th International Symposium on Advanced Technology  2017.11 

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  • Stick boundary condition for large particle diffusion in binary hard-sphere mixtures

    中村有花, 吉森明, 秋山良, 山口毅, 徳永健

    The 11th Mini-Symposium on Liquids  2017.10 

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  • Effects of solvation structure on a large-particle diffusion

    Y. Nakamura, A. Yoshimori, R. Akiyama, T. Yamaguchi

    Jülich Soft Matter Days  2014.11 

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  • 拡散係数におけるストークス-アインシュタイン則の破れー溶質の大きさと溶媒の密度の効果ー

    中村有花, 吉森明, 秋山良

    日本物理学会2014年秋季大会  2014.9 

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  • Effects of solvation structure on diffusion and breakdown of the Stokes-Einstein relation

    中村有花, 吉森明, 秋山良, 山口毅

    The 8th Mini-Symposium on Liquids  2014.7 

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  • 溶媒の粒子性を考慮したときの溶質の拡散の理論

    中村有花, 吉森明, 秋山良

    日本物理学会第69回年次大会  2014.3 

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  • Depletion effects on diffusion in a binary hard sphere mixture

    Y. Nakamura, A. Yoshimori, R. Akiyama

    Nagoya Symposium on Depletion Forces: Celebrating the 60th Anniversary of the Asakura-Oosawa Theory  2014.3 

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  • 拡散係数における溶媒和の効果

    中村有花, 吉森明, 秋山良

    第119回日本物理学会支部例会  2013.11 

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  • Perturbation theory of large particle diffusion in a binary solvent

    Y. Nakamura, A. Yoshimori, R. Akiyama, T. Yamaguchi

    33th International Conference on Solution Chemistry  2013.7 

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  • Slip and Stick boundary conditions for diffusion coefficient and radial distribution function

    中村有花, 吉森明, 秋山良, 山口毅

    The 6th Mini-Symposium on Liquids  2013.6 

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  • 大きな粒子の拡散における摂動理論−摂動を使わない理論のとの比較-

    中村有花, 吉森明, 秋山良

    日本物理学会第68回年次大会  2013.3 

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  • Perturbation theory of large particle diffusion in a binary solvent

    Y. Nakamura, A. Yoshimori, R. Akiyama

    Berkeley 2013 Mini Statistical Mechanics Meeting  2013.1 

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  • 大きな粒子の拡散における摂動理論−摂動を使わない理論のとの比較-

    中村有花, 吉森明, 秋山良

    第26回分子シミュレーション討論会  2012.11 

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  • 拡散係数における枯渇効果

    中村有花, 吉森明, 秋山良

    第2回ソフトマター研究会  2012.9 

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  • 拡散係数における Slip、Stick 条件と動径分布関数

    中村有花, 吉森明, 秋山良

    日本物理学会2012年秋季大会  2012.9 

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  • 大きな粒子の拡散に対する新しい理論~他の理論との比較~

    稲吉裕子, 中村有花, 吉森明, 秋山良

    日本物理学会第67回年次大会  2012.3 

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  • 溶液中での巨大粒子の並進運動に対する共溶媒の効果

    中村有花, 稲吉裕子, 吉森明, 秋山良

    日本物理学会第67回年次大会  2012.3 

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  • 大きな粒子の拡散~溶媒 2 成分系の理論~

    中村有花, 吉森明, 秋山良

    第117回日本物理学会九州支部例会  2011.12 

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  • A perturbation theory for friction of a large particle immersed in a binary solvent

    Y. Nakamura, A. Yoshimori, R. Akiyama

    The 7th Congress of the International Society for Theoretical Chemical Physics  2011.9 

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  • 大きな粒子が 2 成分溶媒系から受ける抵抗の理論とその応用

    中村有花, 吉森明, 秋山良

    日本物理学会2011年秋季大会  2011.9 

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  • A perturbation theory for friction of a large particle immersed in a binary solvent

    Y. Nakamura, A. Yoshimori, R. Akiyama

    8th Liquid Matter Conference  2011.9 

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  • Co-solvent effects on friction of a macromolecule immersed in a solution

    中村有花, 吉森明, 秋山良

    Workshop on Hydration and ATP Energy 2011 第2回全体会議  2011.8 

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  • A perturbation theory for friction of a large particle immersed in a binary solvent

    Y. Nakamura, A. Yoshimori, R. Akiyama

    The 5th International Mini-Symposium on Liquids  2011.6 

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  • 溶液中での巨大粒子の並進運動に対する共溶媒の効果

    中村有花, 吉森明, 秋山良

    第14回理論化学討論会  2011.5 

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  • 大きな粒子が多成分溶媒系から受ける抵抗の理論

    中村有花, 吉森明, 秋山良

    日本物理学会第66回年次大会  2011.3 

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Awards

  • Nature Physics Poster Prize (Jülich Soft Matter Days 2014)

    2014.11  

    Yuka Nakamura

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  • Fujitsu Poster Prize (The 7th Congress of the International Society for Theoretical Chemical Physics)

    2011.9  

    Yuka Nakamura

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Research Projects

  • 多成分溶媒中での大きな粒子の拡散

    Grant number：13J04159

    2013.4 - 2015.3

    System name：科学研究費助成事業 特別研究員奨励費

    Research category：特別研究員奨励費

    Awarding organization：日本学術振興会

    中村 有花

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    Grant amount：\2000000 （ Direct Cost: \2000000 ）

    溶質周りに溶媒粒子がつくる密度分布が溶質の拡散にどう影響するかを理論的に明らかにするために、本年度は次の３点に取り組んだ。
    1つめは前年度に定式化した摂動理論の検証で、拡散係数の計算結果を分子シミュレーションによる計算値と比較した。溶質が溶媒の8倍の大きさのとき誤差5パーセントで、溶質が大きくなるにつれて精度よく計算できることを明らかにした。摂動理論は、これまでの理論と違い有限サイズ効果なしに簡単に拡散係数を計算できるため、非常に有効な理論であることを示した。
    2つめは摂動理論の1成分溶媒剛体球系に応用で、溶媒の密度が高いときに 流体力学のStokes-Einstein(SE) 則が破れることを明らかにした。溶媒密度を上げるにつれ SE則の破れは大きくなり、拡散係数は SE 則より小さい値をとる。SE則は溶媒の密度分布の効果を考慮していないため、SE則の破れは密度分布の効果と言える。また、動径分布関数を用いた考察によって、溶質表面の溶媒密度が高くなることが、SE 則の破れの大きさと強い相関があることが分かった。この研究によって、溶媒の密度が高くなるほど溶媒の密度分布の影響が大きいことが明らかになった。
    3つめは速度場の解析であり、溶質表面の高密度によって溶質表面で溶媒速度が遅くなることが、SE則の破れの原因であることを明らかにした。溶質表面で溶媒の速度が急激に変化することで、溶質にかかる摩擦が大きくなり拡散係数が小さくなる。前年度に行った剛体球2成分溶媒系の計算においてもSE則の破れはみられている。この破れについても溶質表面で溶媒の速度が小さくなることが原因であることを明らかにした。この結果は、実験系において見られているSE則の破れの解釈にもつながると考えられる。

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Teaching Experience

  • 実践物理学演習

    2022
    Institution name：新潟大学

  • 自然科学総論III

    2022
    Institution name：新潟大学

  • 総合技術科学演習

    2021
    Institution name：新潟大学

  • 卒業研究II

    2021
    Institution name：新潟大学

  • 卒業研究I

    2021
    Institution name：新潟大学

  • 物理学基礎BI

    2021
    Institution name：新潟大学

  • 機能生理学

    2021
    Institution name：新潟大学

  • 液体物理学特論

    2021
    Institution name：新潟大学

  • 研究課題調査I

    2021
    Institution name：新潟大学

  • 研究課題調査II

    2021
    Institution name：新潟大学

  • 人間支援感性科学概論

    2021
    Institution name：新潟大学

  • 機械システム論

    2021
    Institution name：新潟大学

  • 卒業研修II

    2020
    Institution name：新潟大学

  • 卒業研修I

    2020
    Institution name：新潟大学

  • 人間支援感性科学実験IV

    2020
    Institution name：新潟大学

  • リメディアル演習

    2020
    Institution name：新潟大学

  • 工学リテラシー入門(融合領域分野)

    2020
    -
    2021
    Institution name：新潟大学

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