A geometry controllable approach for the fabrication of biomimetic hierarchical structure and its superhydrophobicity with near-zero sliding angle

作者：Choi Se Jin; Suh Kahp Y; Lee Hong H^*

来源：Nanotechnology, 2008, 19(27): 275305.

DOI：10.1088/0957-4484/19/27/275305

A simple, geometry controllable method is presented for fabricating multiscale hierarchical polymer structures that exhibit superhydrophobic water-repellent properties with near-zero sliding angle over a large area. A UV-assisted micromolding technique is used to create a microtexture with an ultraviolet (UV)-curable resin containing Al(2)O(3) nanoparticles. A subsequent treatment of ultraviolet ozone (UVO) leads to the formation of nanoscale roughness over the as-formed microstructured surface, resulting in a dual-scale surface texture similar to a lotus leaf, in a reproducible manner. After hydrophobization with a self-assembled monolayer (SAM) in the liquid phase, this hierarchical surface exhibits stable superhydrophobic characteristics, having a water contact angle close to 160 degrees and a contact angle (CA) hysteresis as low as 1 degrees. These characteristics did not change even after exposure to ambient conditions for 6 months.

• 出版日期2008-7-9