Biomimetic hierarchical structure for self-cleaning

Applied Physics Letters - Tập 93 Số 9 - 2008
Bharat Bhushan1, Kerstin Koch2,1, Yong Chae Jung1
1The Ohio State University 1 Nanoprobe Laboratory for Bio- and Nanotechnology and Biomimetics (NLB 2 ), , 201 W. 19th Avenue Columbus, Ohio 43210-1142, USA
2Rheinische Friedrich-Wilhelms University of Bonn 2 Nees Institute for Biodiversity of Plants, , Meckenheimer Allee 170, 53115 Bonn, Germany

Tóm tắt

Hierarchical roughness is beneficial for superhydrophobicity. Surfaces with microstructure, nanostructure, and hierarchical structure were fabricated by replication of micropattern and self- assembly of hydrophobic alkanes. The fabrication technique used is a low cost two step process, which provides flexibility in the fabrication of a variety of hierarchical structures. Fabricated structures and surface chemistry mimic the hierarchical surfaces of superhydrophobic and self-cleaning plant surfaces. The influence of structure on superhydrophobicity at different length scales is demonstrated by the investigation of static contact angle, hysteresis and tilt angles, and propensity of air pocket formation as well as adhesive forces.

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Applied Physics Letters

Tập 93 Số 9

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