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Laser microstructuring of azopolymers via surface relief gratings: controlling hydrophobicity

M. R. CARDOSO1, V. TRIBUZI1, D. T. BALOGH1, L. MISOGUTI1, C. R. MENDONÇA1,*

Affiliation

  1. Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, CEP 13560-970 São Carlos, SP, Brazil

Abstract

In this paper the large-scale mass transport mechanism is used to microstructure azopolymeric films, aiming at controllable hydrophobic surfaces. Using an Ar+ laser with intensity of 70 mW/cm 2 , we produced egg-crate-like surfaces with periods from 1.0 to 3.5 µm that present distinct wetting properties. The static contact angle of water was measured on the microstructured surfaces, and the results revealed an increase of approximately 9 for a surface pattern period of 2 µm. Our results indicate the use of the microstructuring method described here for the fabrication of devices with controllable hydrophobicity..

Keywords

Micromachining, Hydrophobic, Wettability, Surface-relief-gratings, Azopolymers.

Submitted at: June 11, 2009
Accepted at: Feb. 27, 2010

Citation

M. R. CARDOSO, V. TRIBUZI, D. T. BALOGH, L. MISOGUTI, C. R. MENDONÇA, Laser microstructuring of azopolymers via surface relief gratings: controlling hydrophobicity, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 3, pp. 745-748 (2010)