Nano Research

, Volume 1, Issue 4, pp 292–302 | Cite as

Facile tuning of superhydrophobic states with Ag nanoplates

Open Access
Research Article

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 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.

Keywords

Superhydrophobic Cassie Wendel Ag nanoplates GaAs self-assembled monolayers 

Supplementary material

12274_2008_8030_MOESM1_ESM.pdf (585 kb)
Supplementary material, approximately 588 KB.

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  1. 1.Argonne National LaboratoryCenter for Nanoscale MaterialsArgonneUSA
  2. 2.Department of Mechanical Engineering, College of Engineering and ScienceClemson UniversityClemsonUSA

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