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Reversible electrowetting on superhydrophobic double-nanotextured surfaces
journal contribution
posted on 2023-05-18, 09:23 authored by Lapierre, F, Thomy, V, Coffinier, Y, Blossey, R, Boukheroub, RThe paper reports on wetting, electrowetting (EW), and systematic contact angle hysteresis measurements after electrowetting of superhydrophobic silicon nanowire surfaces (NWs). The surfaces consist of C4F8-coated silicon nanowires grown on Si/SiO2 substrate. Different surfaces modulating (i) the dielectric layer thickness and (ii) the nanotexturation were investigated in this study. It was found that the superhydrophobic NWs display different EW behaviors according to their double nanotexturation with varying droplet impalement levels. Some surfaces exhibited a total reversibility to EW with no impalement (contact angle variation of 35 ± 2° at 190 VTRMS with deionized water), whereas other surfaces showed nonreversible behavior to EW with partial droplet impalement. A scenario is proposed to explain the unique properties of these surfaces.
History
Publication title
LangmuirVolume
25Issue
11Pagination
6551-6558ISSN
0743-7463Department/School
School of Natural SciencesPublisher
Amer Chemical SocPlace of publication
1155 16Th St, Nw, Washington, USA, Dc, 20036Rights statement
Copyright 2009 American Chemical SocietyRepository Status
- Restricted