The bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelle is a nanometer-sized quasispherical aggregate that can dissolve water in its interior. This feature makes a reverse micelle a valuable model system for the study of "hydration water", i.e. water confined in the proximity of polar and ionic groups. We present a first study of the structural and thermodynamical properties of a system formed by 2048 CCl4 molecules in which an AOT reverse micelle, including its internal hydration water and Na+ counterions, is contained. CCl4 equilibrium configurations are obtained from a very long hybrid Monte Carlo simulation of a cubic box of 256 CCl4 molecules which is then duplicated in all three dimensions. The whole system is successively equilibrated using a standard molecular dynamics simulation algorithm.
Molecular dynamics and hybrid Monte Carlo simulations of a sodium bis(2-ethylhexyl)-sulfosuccinate reverse micelle
La Penna G;
2000
Abstract
The bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelle is a nanometer-sized quasispherical aggregate that can dissolve water in its interior. This feature makes a reverse micelle a valuable model system for the study of "hydration water", i.e. water confined in the proximity of polar and ionic groups. We present a first study of the structural and thermodynamical properties of a system formed by 2048 CCl4 molecules in which an AOT reverse micelle, including its internal hydration water and Na+ counterions, is contained. CCl4 equilibrium configurations are obtained from a very long hybrid Monte Carlo simulation of a cubic box of 256 CCl4 molecules which is then duplicated in all three dimensions. The whole system is successively equilibrated using a standard molecular dynamics simulation algorithm.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
