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Nano Research 2008, 1(4): 292-302 https://doi.org/10.1007/s12274-008-8030-7
Research Article | Open Access | Issue | Published: 01 October 2008

Facile Tuning of Superhydrophobic States with Ag Nanoplates

Show Author's Information Yugang Sun1( ),  Rui Qiao2
Argonne National LaboratoryCenter for Nanoscale Materials, 9700 South Cass Avenue, ArgonneIL60439USA
Department of Mechanical EngineeringCollege of Engineering and ScienceClemson University, ClemsonSC29634USA
Keywords:
Superhydrophobic, GaAs, Cassie, Wendel, Ag nanoplates, self-assembled monolayersIntroduction
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Sun Y, Qiao R. Facile Tuning of Superhydrophobic States with Ag Nanoplates. Nano Research, 2008, 1(4): 292-302. https://doi.org/10.1007/s12274-008-8030-7
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Abstract Full text Electronic supplementary material About this article

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 were 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 influences 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.


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About this article

Facile Tuning of Superhydrophobic States with Ag Nanoplates

Show Author's information Yugang Sun1( ), Rui Qiao2
Argonne National LaboratoryCenter for Nanoscale Materials, 9700 South Cass Avenue, ArgonneIL60439USA
Department of Mechanical EngineeringCollege of Engineering and ScienceClemson University, ClemsonSC29634USA

Abstract

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 were 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 influences 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.

Keywords: Superhydrophobic, GaAs, Cassie, Wendel, Ag nanoplates, self-assembled monolayersIntroduction

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Publication history

Received: 22 July 2008
Revised: 15 August 2008
Accepted: 15 August 2008
Published: 01 October 2008
Issue date: August 2008

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© Tsinghua Press and Springer-Verlag 2008

Acknowledgements

Acknowledgment

The submitted manuscript has been created by UChicago Argonne, LLC, Operator of Argonne National Laboratory ("Argonne"). Argonne, a U.S. Department of Energy Office of Science Laboratory, is operated under Contract No. DE-AC02-06CH11357. Use of the Center for Nanoscale Materials and the Electron Microscopy Center for Materials Research at Argonne was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The authors would like to thank Dr. H. H. Wang in the Materials Science Division at Argonne for his help in contact angle measurements.

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