Design and fabrication of micro-textures for inducing a superhydrophobic behavior on hydrophilic materials.
Artificial superhydrophobic surfaces are typically fabricated by tuning the surface roughness of intrinsically hydrophobic surfaces. We report here the design and fabrication of micro-textures for inducing a superhydrophobic behavior on hydrogen-terminated Si surfaces with an intrinsic water contact angle of approximately 74 degrees . The micro-textures consist of overhang structures with well-defined geometries fabricated by microfabrication technologies, which provide positions to support the liquid and prevent the liquid from entering into the indents between the micro-textures. As a result, water is in contact with a composite surface of solid and air, which induces the observed macroscopic superhydrophobic behavior.
Cao
Liangliang
L
Department of Chemical and Petroleum Engineering, Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA.
Hu
Hsin-Hua
HH
Gao
Di
D
D000268:Adhesiveness; D000388:Air; D002627:Chemistry, Physical / Q000379:methods*; D006859:Hydrogen / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008420:Manufactured Materials; D008832:Microchemistry; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties; D014867:Water / Q000737:chemistry
D014867:Water; D006859:Hydrogen; D012825:Silicon