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Diffusion of water submonolayers on hydrophilic surfaces

By Jae Hyun Park and N. R. Aluru

Abstract

In this letter, we investigate using molecular dynamics simulations the diffusion of water submonolayers on hydrophilic surfaces. In contrast to a strong hydrophilic Ag surface, on a weak hydrophilic Pb surface, the diffusion coefficient is remarkably enhanced at a critical surface coverage and a Λ-shape anomaly with surface coverage is observed, i.e., the diffusion coefficient increases with the increase in surface coverage until a critical surface coverage, beyond which the diffusion coefficient decreases. We explain the anomalous diffusion of water on hydrophilic surfaces by a detailed understanding of molecular cavities and monolayer tail contributing to three-dimensional hydrogen bonding

Topics: Nanoscale Science and Design
Publisher: American Institute of Physics
OAI identifier: oai:pubmedcentral.nih.gov:2682753
Provided by: PubMed Central
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