文献类型：期刊文献

中文题名：波长与功率密度对激光烧蚀制备纳米粒子的影响

英文题名：Effects of Laser Wavelength and Power Densities on Nanoparticles Made by Laser Ablation

作者：金桂林[1];金晓英[1];朱莉[1];宋顺军[1]

机构：[1]华东理工大学,上海200237

年份：2005

卷号：35

期号：9

起止页码：633

中文期刊名：激光与红外

外文期刊名：Laser & Infrared

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：激光烧蚀;纳米粒子;波长;功率密度

外文关键词：laser ablation ; nanoparticles; wavelength; power density

摘要：用TEA CO2激光烧蚀方法制备了NiSO4/Ni(Ac)2纳米粒子,其化学成分与靶材原料十分相似,其中含少量Ni2O3.当采用被靶材物质直接吸收的激光谱线9P(18)、9R(18)时,纳米粒子的保成分性较好,得到粒径10～20nm、分散性良好的圆形粒子,其功率密度阈值为1.6×108w/cm2,其反应机理主要是共振吸收以及激光支持爆轰波的作用;当采用不被靶材物质直接吸收的激光谱线10P(18)时,得到粒径为20～25nm、分散性良好的方形粒子,其功率密度阈值为1.9×108w/cm2,其反应机理主要是自聚焦和内爆轰的作用.当其它条件相同时,功率密度较大则粒子的粒度更细.
Nanoparticles of NiSO4/Ni （Ac）2 were made by ablation of TEA CO2 laser, the chemical composition of which was very similar to that of their target materials,and a little Ni2O3 was contained. A good property of preservingcomposion was abtained, while the laser lines of 9P （ 18 ） and 9R （ 18 ） absorbed directly by target materials were used; and round nanoparticles of size 10 ～ 20nm ,well dispersed, were prepared. The threshold of laser power density of these lines was 1.6 × 10^8w/cm^2. The reaction mechanism was the effects of resonant absorption and laser supported-detonation wave. While the line of 10P （18）, not absorbed derectly by target materials, was used, square nanoparticles of size20 ～ 25nm,well dispersed,were prepared. The threshold of laser power density was 1.9 × 10^8w/cm^2. The reaction mechanism was the effects of serf-focussing ang inner-detonation. When the other conditions were the same, the higher the power density was, the finer the nanoparticles could be obtained.