Indexed by:期刊论文

Date of Publication:2017-07-03

Journal:JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

Included Journals:EI、SCIE、Scopus

Volume:38

Issue:7

Page Number:979-984

ISSN No.:0193-2691

Key Words:Directional transportation; electrochemical etching; lithography; Wettability-gradient

Abstract:This paper proposes a simple, precise, and controllable method to fabricate wettability-gradient surfaces. Combining electrochemical etching and lithography, different micro/nanostructures can be obtained by adjusting the etching time. After being modified by low energy substances, low adhesive superhydrophobic and sticky hydrophobic regions can be obtained on one surface. Based on the obtained adhesion gradient, droplets of different volumes can be controlled to roll off at dissimilar tilted angles via designing sticky hydrophobic tracks with different widths. Directional transportation of water droplets on curve tracks is also realized based on the anisotropic sliding angles parallel and perpendicular to the tracks.
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