Air trapped nanocavity induced superhydrophobicity on GaN microbelt

作者：Sahoo Prasana^*; Dhara S; Dash S; Raj Baldev; Manna I; Tyagi A K

来源：Applied Physics Letters, 2011, 98(4): 043103.

DOI：10.1063/1.3541877

In the present study, nanotextured surface protrusion induced superhydrophobicity in GaN microbelt is reported. The results show that along with nanometer-scale topographic features, the special air trapped nanocavities formed beneath the liquid droplet are solely responsible for the transition of superhydrophobicity having hydrophilic origin in GaN. The built-in nanocavities, (similar to 80 nm in diameter) provide an ideal model for producing stable air trapped region. A calculation of shape of the meniscus at the interface of air and water in an isolated cavity correlates well with the macroscopic surface wetting behavior.

• 出版日期2011-1-24