期刊
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
卷 607, 期 1, 页码 1-12出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/15421406.2014.927414
关键词
Nanoparticle; size distribution; zinc oxide; pulsed laser ablation; SEM; TEM; photoluminescence
We have studied the effects of the laser fluence on the characteristics of ZnO nanoparticles produced by pulsed laser ablation (PLA) of Zn plate in acetone. The beam of a Q-switched Nd:YAG laser of 1064 wavelength at 7ns pulse width and different fluencies was employed to produce nanoparticles. The ZnO nanoparticles were found to be hexagonal. The size distribution of generated nanoparticles is increased by increasing the laser fluence. The production rate of nanoparticles is increased with increasing the laser fluence. ZnO nanoparticles were formed with spherical shape. The bandgap energy of nanoparticles is calculated to be 3.59-3.89eV. In this range of ZnO nanoparticle size, photoluminescence spectrum exhibits two peaks due to bandgap transition and defect levels.
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