Nonequilibrium molecular dynamics simulation of diffusion at the liquid-liquid interface

作者：Braga Carlos; Galindo Amparo; Mueller Erich A

来源：Journal of Chemical Physics, 2014, 141(15): 154101.

DOI：10.1063/1.4897159

Molecular Dynamics simulations are performed to study the dynamical properties of molecules in the presence of a liquid-liquid (L/L) interface. In the vicinity of the interface the movement of the particles, coupled with the thermal fluctuations of the interface, can make the evaluation of properties such as the self-diffusion coefficient, particularly difficult. We explore the use of the Evans-Searles Fluctuation Theorem [D. Evans and D. Searles, Phys. Rev. E 50, 1645 (1994)] to obtain dynamical information of molecules in distinct regions of a model L/L system. We demonstrate that it is possible to analyse the effect of the interface on the mobility of molecules using a nonequilibrium approach. This information may provide a valuable insight into the understanding of dynamics of interphase mass transfer.

• 出版日期2014-10-21