The light-induced deformation of a micro-textured photo-sensitive polymeric material is exploited for modifying the surface hydrophobicity along deterministic directions. Arrays of azopolymeric micro-pillars are fabricated over large area and irradiated with a green laser. Upon laser irradiation, the micro-pillars deform reversibly along a direction parallel to the laser polarization, resulting in elongated shapes with controllable eccentricity. Such a locally anisotropic topography induces a directional yet reversible change of hydrophobicity, as measured by contact angles varying within a range of 30 degrees. Published by AIP Publishing.

Laser-induced anisotropic wettability on azopolymeric micro-structures / Pirani, Federica; Angelini, Angelo; Ricciardi, Serena; Frascella, Francesca; Descrovi, Emiliano. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 110:10(2017), p. 101603. [10.1063/1.4978260]

Laser-induced anisotropic wettability on azopolymeric micro-structures

Angelo Angelini;Emiliano Descrovi
2017

Abstract

The light-induced deformation of a micro-textured photo-sensitive polymeric material is exploited for modifying the surface hydrophobicity along deterministic directions. Arrays of azopolymeric micro-pillars are fabricated over large area and irradiated with a green laser. Upon laser irradiation, the micro-pillars deform reversibly along a direction parallel to the laser polarization, resulting in elongated shapes with controllable eccentricity. Such a locally anisotropic topography induces a directional yet reversible change of hydrophobicity, as measured by contact angles varying within a range of 30 degrees. Published by AIP Publishing.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/63098
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