Wettability of Surface with Nano-structures Studied by Using Molecular Dynamics Simulation

Abstract

Abstract: The molecular dynamics simulation method was applied to investigate the wettability of argon nano-droplets on platinum and other model solids. The contact angle and spreading characteristics of flat and triangle-array nano-structure surfaces were obtained. For the hydrophilic fluid-solid interaction, the homogeneous wetting took place between the droplet and the nano-structure surface, while the apparent contact angle was little affected due to the hysteresis. For the hydrophobic interaction, vapor-like phase appeared inside the nano-structure diastemata, and the wetting between the droplet and the nano-structure surface turned to be heterogeneous. Within the simulation scales, the contact angle increased with increasing the nano-structure size, and might even show surperhydrophobicity.

Key words: Wettability, Contact angle, Surface nano-structure, Molecular dynamics simulation

CLC Number:

O647

TrendMD:

CAO Bing-Yang, CHEN Min, GUO Zeng-Yuan. Wettability of Surface with Nano-structures Studied by Using Molecular Dynamics Simulation[J]. Chem. J. Chinese Universities, 2005, 26(2): 277.

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Wettability of Surface with Nano-structures Studied by Using Molecular Dynamics Simulation

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