Reversible switching of nanostructured cobalt hydroxide films from superhydrophobic to superhydrophilic state

被引：8
|
作者：
Basu, Bharathibai J. [1 ]
Manasa, J. [1 ]
机构：
[1] CSIR, Natl Aerosp Labs, Surface Engn Div, Bangalore 560017, Karnataka, India
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2011年 / 103卷 / 02期
关键词：
STEARIC-ACID; WETTABILITY; TRANSITION; NANOROD; FABRICATION; SOLUBILITY; SURFACES; GROWTH;
D O I：
10.1007/s00339-011-6244-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Superhydrophobic cobalt hydroxide films with flower-like micro-nano structure prepared by chemical-bath deposition undergo a change in wettability from superhydrophobic to superhydrophilic state either by immersion in ethyl acetate or by heat treatment at 200A degrees C and above. The superhydrophobicity of the film can be regained by immersion in an ethanolic solution of stearic acid. The superhydrophobicity is attributed to the combined effect of micro-nano binary surface morphology and the low surface energy of the self-assembled monolayer of stearic acid. It is proposed that switching from superhydrophobicity to superhydrophilicity is caused by removal of the adsorbed layer of stearic acid by solvent or heat treatment.
引用
收藏
页码：343 / 348
页数：6
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