Nonequilibrium study of the intrinsic free-energy profile across a liquid-vapour interface | Zendy

Carlos Braga | Zendy; Jordan Muscatello | Zendy; Gabriel V. Lau | Zendy; Erich A. Müller | Zendy; George Jackson | Zendy

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Nonequilibrium study of the intrinsic free-energy profile across a liquid-vapour interface

Author(s) -

Carlos Braga,

Jordan Muscatello,

Gabriel V. Lau,

Erich A. Müller,

George Jackson

Publication year - 2016

Publication title -

the journal of chemical physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.071

H-Index - 357

eISSN - 1089-7690

pISSN - 0021-9606

DOI - 10.1063/1.4940137

Subject(s) - non equilibrium thermodynamics , layering , energy (signal processing) , thermodynamics , mean free path , materials science , energy profile , chemistry , statistical physics , physics , optics , scattering , quantum mechanics , botany , biology

We calculate an atomistically detailed free-energy profile across a heterogeneous system using a nonequilibrium approach. The path-integral formulation of Crooks fluctuation theorem is used in conjunction with the intrinsic sampling method to calculate the free-energy profile for the liquid-vapour interface of the Lennard-Jones fluid. Free-energy barriers are found corresponding to the atomic layering in the liquid phase as well as a barrier associated with the presence of an adsorbed layer as revealed by the intrinsic density profile. Our findings are in agreement with profiles calculated using Widom's potential distribution theorem applied to both the average and the intrinsic profiles as well as the literature values for the excess chemical potential.

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