writer：Wendong Liu, Xueyao Liu, Siyuan Xiang, Yixin Chen, Liping Fang, and Bai Yang
keywords：chamfer nanocylinder arrays, inclined etching, superoleophobic, anisotropic, chemical-heterogeneous
source：期刊
specific source：Nano Research 2016, 9(10): 3141–3151
Issue time：2016年

A functional interface based on silicon chamfer nanocylinder arrays (CNCAs)

was successfully fabricated by carrying out secondary etching of silicon

nanopillar arrays via a facile inclined etching method. The structure of the

novel CNCAs was finely modulated by varying the nanopillar array structure

and the etching conditions. The underwater oil wetting behavior of this

CNCAs-based interface can be easily modulated from superoleophilic (oil contact

angle (OCA) of ~8.13°) state to superoleophobic (OCA of ~163.79°) state by

modifying the surface using different substances. Moreover, a reversible

transformation of underwater oil wetting behavior from superoleophobic (OCA

of ~155.67°) state to oleophilic (OCA of ~31.27°) state was achieved by grafting

a temperature-responsive polymer onto this specific asymmetric structure. The

functional interface exhibited isotropic wetting behavior under certain oleophilic

conditions. Chemically heterogeneous structures, obtained via asymmetry

modification of CNCAs, exhibited amphiphobic properties while maintaining

their anisotropic wetting ability.