Volume 38, Number 7, June I 1997
|Page(s)||527 - 532|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
Dynamics of a driven probe molecule in a liquid monolayer
Centre de Recherche en Modélisation Moléculaire,
Service de Physique Statistique
et Probabilités, Université de
Mons-Hainaut - 20 place du Parc, 7000 Mons, Belgium
2 Laboratoire de Physique Théorique des Liquides, Université Paris VI, 4 Place Jussieu, 75252 Paris Cedex 05, France
Accepted: 21 April 1997
We study the dynamics of a probe molecule, driven by an external constant force in a liquid monolayer on top of a solid surface. In terms of a microscopic, mean-field–type approach, we calculate the terminal velocity of the probe molecule. This allows us to establish the analog of the Stokes formula, in which the friction coefficient is interpreted in terms of the microscopic parameters characterizing the system. We also determine the distribution of the monolayer particles as seen from the stationary moving probe molecule and estimate the self-diffusion coefficient for diffusion in a liquid monolayer.
PACS: 68.15.+e – Liquid thin films / 05.60.+w – Transport processes: theory
© EDP Sciences, 1997
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