Abstract

Molecular dynamics (MD) simulations have been used to study structural and dynamical aspects of a sodium octonoate micelle. The model micelle contains 15 octanoate molecules and 15 sodium atoms in an aqueous solution containing 792 water molecules in a cubic 31.1 Å box. The coordinate trajectory from a 300 ps simulation has been used to analyze the hydrophobic core region, the distribution of counter ions and water molecules around the monomer head groups. Of special interest is to investigate the mechanism of water penetration into the hydrophobic hydrocarbon core region. The results are discussed in relation to some recent findings on the properties of medium-chain surfactants.

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