期刊
THIN SOLID FILMS
卷 523, 期 -, 页码 46-51出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2012.06.011
关键词
Nanosecond laser ablation; Alumina; Liquid plasma; Size distributions
Alumina nanoparticles (NPs) were synthesized by laser ablation of a bulk alpha-alumina (corundum) target immersed in distilled water using nanosecond laser pulses of 1064-nm wavelength. We investigated the effect of laser power and water column above the target. Synthesized particles were analyzed regarding particle shape and size distributions with scanning electron and transmission electron microscopy. Ablated NPs were spherical in shape and the average particle size ranged from 12 to 18 nm at varied laser power and water levels, although a very small number of melted droplets of submicron spheroids and irregular-shaped cracked particles were observed. X-ray diffraction analysis was conducted, which shows mainly the peaks of alpha-Al2O3 and minor peaks of gamma-Al2O3. Phase identification of NPs, using high-resolution transmission electron micrograph lattice images and fast Fourier transform exhibits both metastable gamma-Al2O3 and stable alpha-Al2O3 phases. (C) 2012 Elsevier B. V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据