title: Single-step process for the deposition of high water contact angle and high water sliding angle surfaces by atmospheric pressure dielectric barrier discharge.
abstract: Fluorine-free surfaces with high water contact angle (WCA) and high adhesion force to water are prepared by the atmospheric pressure dielectric barrier discharge (AP-DBD) of hexamethyldisiloxane on cold rolled aluminum foil. Water droplets, which remained on the plasma-polymerized hexamethyldisiloxane (ppHMDSO) surface with contact angle of 155°, do not slide even when the surface is tilted vertically or turned upside down. Scanning electron microscopy, atomic force microscopy and confocal microscopy highlight the importance of the dual-scale roughness of the ppHMDSO surface. The "sticky" high WCA property is achieved only when the nanometer scale particles generated during the AP-DBD process are present at the surface of the film and combine to the micrometer scale rolling lines of the aluminum substrate.
authors: Science and Analysis of Materials Department, Centre de Recherche Public - Gabriel Lippmann, Belvaux, L-4422, Luxembourg. nboscher@lippmann.lu
authors: Nicolas D
authors: ND
authors: Boscher
authors: David
authors: D
authors: Duday
authors: Stéphane
authors: S
authors: Verdier
authors: Patrick
authors: P
authors: Choquet