title: Reversible electrowetting on superhydrophobic silicon nanowires.
abstract: This paper reports for the first time on the reversible electrowetting of liquid droplets in air and oil environments on superhydrophobic silicon nanowires (SiNWs). The silicon nanowires were grown on Si/SiO2 substrates using the vapor-liquid-solid (VLS) mechanism, electrically insulated using 300 nm SiO2, and hydrophobized by coating with a fluoropolymer C4F8. The resulting surfaces displayed liquid contact angle (Theta) around 160 degrees for a saline solution (100 mM KCl) in air with almost no hysteresis. Electrowetting induced a maximum reversible decrease of the contact angle of 23 degrees at 150 VTRMS in air.
authors.affiliation: Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS-8520, Cité Scientifique, Avenue Poincaré, BP. 60069, 59652 Villeneuve d'Ascq, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Verplanck
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Galopin
authors.forename: Jean-Christophe
authors.initials: JC
authors.lastname: Camart
authors.forename: Vincent
authors.initials: V
authors.lastname: Thomy
authors.forename: Yannick
authors.initials: Y
authors.lastname: Coffinier
authors.forename: Rabah
authors.initials: R
authors.lastname: Boukherroub