摘要
GaAs wafers have been decorated with Ag nanoplates through direct galvanic reaction between aqueous AgNO_(3) 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 AgNO_(3) 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.
基金
The submitted manuscript has been created by UChicago Argonne,LLC,Operator of Argonne National Laboratory(“Argonne”).Argonne,a U.S.Department of Energy Offi ce 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.
