Kurdish Studies

ISSN: 2051-4883 | e-ISSN: 2051-4891

Laser-induced Surface Modifications for Hydrophilicity and Hydrophobicity Applications

A. A. Hatem
Laser &Optoelectronics Engineering Department, College of Engineering, Al-Nahrain University, Baghdad, Iraq.
B. G. Rasheed
Laser &Optoelectronics Engineering Department, College of Engineering, Al-Nahrain University, Baghdad, Iraq.
Keywords: Silicon Nanostructure, Silicon Microstructure. Hydrophobic, Hydrphpilic..

Abstract

Surface reconstruction for various materials was performed using lasers devoted for hydrophilic and hydrophobic applications. Photoelectrochemical etching of Silicon using diode laser of 532 nm was carried out to synthesize nanostructured layer with contact angles varied from (70°) to (115°) according to the preparation conditions. This process produces hydrophobic surfaces. While fiber laser of 1064 nm wavelength was employed for surface micro texturing of glass and stainless steel. Hereby, hydrophilic effect was observed.with contact angles in the ranges (10°-35°) and (14°-74°) for glass and stainless steel, respectively. Morover, Superhydrophilic surfaces with minimum contact angles (10°) and (14°) for both glass and stainless steel respectively when silicon nanoparticles of average size (10 nm) embedded in microstructured surfaces. It is also found that large surface area of Silicon surface leads to increase the contact angle.

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