Gocalinska, A;Gradkowski, K;Dimastrodonato, V;Mereni, LO;Juska, G;Huyet, G;Pelucchi, E

2011

August

Journal of Applied Physics

Wettability and "petal effect" of GaAs native oxides

Validated

WOS: 9 ()

SURFACES WATER

110

We discuss unreported transitions of oxidized GaAs surfaces between (super) hydrophilic and hydrophobic states when stored in ambient conditions. Contact angles higher than 90 degrees and high adhesive force were observed for several air-aged epitaxial samples grown under different conditions as well as on epi-ready wafers. Regardless of the morphologies of the surface, superhydrophilicity of oxygen-plasma treated samples was observed, an effect disappearing with storage time. Reproducible hydrophobicity was likewise observed, as expected, after standard HCl surface etching. The relation between surface oxides and hydrophobic/hydrophilic behavior is discussed. (C) 2011 American Institute of Physics. [doi:10.1063/1.3619797]

MELVILLE

0021-8979

10.1063/1.3619797