論文

査読有り
2014年6月

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

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • Yuka Nakamura
  • ,
  • Akira Yoshimori
  • ,
  • Ryo Akiyama

83
6
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.7566/JPSJ.83.064601
出版者・発行元
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.

Web of Science ® 被引用回数 : 8

リンク情報
DOI
https://doi.org/10.7566/JPSJ.83.064601
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000336733300041&DestApp=WOS_CPL

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