Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1999-01-12
Physics
Condensed Matter
Statistical Mechanics
LaTeX-Revtex file with 7 encapsulated postscript figures. Accepted for publication in Journal of Chemical Physics
Scientific paper
10.1063/1.478710
By means of extensive equilibrium molecular dynamics simulations we have investigated, the behavior of the interfacial tension $\gamma$ of two immiscible symmetrical Lennard-Jones fluids. This quantity is studied as function of reduced temperature $T^{*}={{k_{_B} T}\over \epsilon}$ in the range $0.6 \leq T^{*} \leq 3.0$. We find that, unlike the monotonic decay obtained for the liquid-vapor interfacial tension, for the liquid-liquid interface, $\gamma (T)$ has a maximum at a specific temperature. We also investigate the effect that surfactant-like particles has on the thermodynamic as well as the structural properties of the liquid-liquid interface. It is found that $\gamma$ decays monotonically as the concentration of the surfactant-like particles increases.
Alejandre José
Diaz-Herrera Enrique
Forstmann F.
Ram{\'ı}rez-Santiago Guillermo
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