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

Basu, Bharathibai J and Manasa, J (2011) Reversible switching of nanostructured cobalt hydroxide films from superhydrophobic to superhydrophilic state. Applied Physics A-Material Science Process, 103 (2). pp. 343-348. ISSN 0947-8396

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Abstract

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.

Item Type: Journal Article
Uncontrolled Keywords: Materials Science, Multidisciplinary; Physics, Applied
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Surface Engineering Division, Surface Engineering Division
Depositing User: Ms Indrani V
Date Deposited: 22 Jun 2011 14:44
Last Modified: 22 Jun 2011 14:44
URI: http://nal-ir.nal.res.in/id/eprint/9239

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