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Facile tuning of superhydrophobic states with Ag nanoplates

Sun, Yugang and Qiao, Rui (2008) Facile tuning of superhydrophobic states with Ag nanoplates. Nano Research, 1 (4). pp. 292-302.

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GaAs wafers have been decorated with Ag nanoplates through direct galvanic reaction between aqueous AgNO3 solutions and GaAs, resulting in Ag nanoplate/GaAs composite surfaces with varying hydrophobocity after the Ag nanoplates are coated with self-assembled monolayers of alkyl thiol molecules. By carefully controlling the reaction conditions, such as growth time and concentration of the AgNO3 solution, the size, thickness, and surface roughness of the individual Ag nanoplates can be tuned in order to produce different topographic structures and roughness of the composite surfaces, which in turn infl uences the hydrophobicity of the surfaces. The as-synthesized composite surfaces have been found to exhibit various levels of hydrophobicity and different wetting states such as the Wenzel wetting state, Cassie impregnating wetting state, and Cassie nonwetting state. The relationship between surface structure and hydrophobic state is also discussed.

Item Type:Article
Uncontrolled Keywords:Superhydrophobic - Cassie - Wendel - Ag nanoplates - GaAs - self-assembled monolayers
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:8849
Deposited By:IoN
Deposited On:23 Apr 2010 10:40
Last Modified:23 Apr 2010 10:40

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