Toward the hydrophobic state transition by the appropriate vibration of substrate
College of Mathematics, Physics and Information Engineering, Zhejiang Normal University - Jinhua 321004, PRC
2 Institute of Textiles and Clothing, The Hong Kong Polytechnic University - Kowloon, Hong Kong
Accepted: 19 October 2011
On the basis of molecular-dynamics simulations, we demonstrate the transition from hydrophobic to super-hydrophobic or hydrophilic to hydrophobic by substrate vibration. The wetting degree can be modulated by the substrate vibration period and substrate vibration amplitude. A phase diagram emerging out of the vibration amplitude threshold from the simulations and can offer a quantitative guideline toward a feasible and robust physical approach to applications. Furthermore, we show that the wettability of a graphene surface can be controlled by tuning its surface energy via an external field. Our work demonstrates that vibration is a promising method to apply in practice.
PACS: 61.20.Ja – Computer simulation of liquid structure / 61.30.Hn – Surface phenomena: alignment, anchoring, anchoring transitions, surface-induced layering, surface-induced ordering, wetting, prewetting transitions, and wetting transitions / 68.08.Bc – Wetting
© EPLA, 2011