Ablation of ZnO in liquid by Nanosecond Laser

Abstract

Zinc oxide (ZnO) was synthesized by laser ablation in liquid. The preparation steps included immersing ZnO bulk pellet in ethanol and then ablating by Nd-Yag laser. The used laser has a wavelength ranging from 1064 nm to 532 nm with 140 mJ pulse intensity. Structural, morphological and optical properties of the prepared material were investigated by X-ray diffraction, scanning electron microscopy and UV-Vis spectroscopy, respectively. The XRD results revealed the formation of hexagonal ZnO structure with (101) as dominant peak. The SEM studies demonstrated the formation of spherical ZnO nanoparticles which agglomerated to form nanocluster. Typical exciton absorption was observed at 376 nm in the absorption spectrum of UV-Vis spectroscopy at room temperature and the energy gap was equal to (3.48 eV).