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

被引：0
|
作者：
Bharathibai J. Basu
J. Manasa
机构：
[1] National Aerospace Laboratories (CSIR),Surface Engineering Division
来源：
Applied Physics A | 2011年 / 103卷
关键词：
Stearic Acid; Water Contact Angle; Contact Angle Hysteresis; Switching Cycle; Cobalt Hydroxide;
D O I：
暂无
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学科分类号：
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 200°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.
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页码：343 / 348
页数：5
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