Facile tuning of superhydrophobic states with Ag nanoplates.
GaAs wafers have been decorated with Ag nanoplates through direct galvanic reaction between aqueous AgNO{sub 3} 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 AgNO{sub 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 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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 983460
- Report Number(s):
- ANL/CNM/JA-62057; ISSN 1998-0000; TRN: US201014%%353
- Journal Information:
- Nano Res., Vol. 1, Issue 4 ; 2008; ISSN 1998-0124
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Laser-driven growth of silver nanoplates on p-Type GaAs substrates and their surface-enhanced raman scattering activity.
Layered micro-and nanostructures of pristine silver grown on semiconductor wafers through a galvanic displacement reaction.