Gonzalez Jhanis J, Liu Chunyi, Wen Sy-Bor, Mao Xianglei, Russo Richard E
Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Talanta. 2007 Sep 30;73(3):577-82. doi: 10.1016/j.talanta.2007.04.028. Epub 2007 May 4.
Pulsed laser ablation (266nm) was used to generate glass particles from two sets of standard reference materials using femtosecond (150fs) and nanosecond (4ns) laser pulses with identical fluences of 50Jcm(-2). Scanning electron microscopy (SEM) images of the collected particles revealed that there are more and larger agglomerations of particles produced by nanosecond laser ablation. In contrast to the earlier findings for metal alloy samples, no correlation between the concentration of major elements and the median particle size was found. When the current data on glass were compared with the metal alloy data, there were clear differences in terms of particle size, crater depth, heat affected zone, and ICP-MS response. For example, glass particles were larger than metal alloy particles, the craters in glass were less deep than craters in metal alloys, and damage to the sample was less pronounced in glass compared to metal alloy samples. The femtosecond laser generated more intense ICP-MS signals compared to nanosecond laser ablation for both types of samples, although glass sample behavior was more similar between ns- and fs-laser ablation than for metal alloys.
使用脉冲激光烧蚀（266nm），利用飞秒（150fs）和纳秒（4ns）激光脉冲，在相同能量密度50Jcm⁻²的条件下，从两组标准参考材料中生成玻璃颗粒。对收集到的颗粒进行扫描电子显微镜（SEM）成像显示，纳秒激光烧蚀产生的颗粒团聚物更多、更大。与早期关于金属合金样品的研究结果不同，未发现主要元素浓度与颗粒中位尺寸之间存在相关性。将当前关于玻璃的数据与金属合金数据进行比较时，在颗粒尺寸、坑深、热影响区和电感耦合等离子体质谱（ICP-MS）响应方面存在明显差异。例如，玻璃颗粒比金属合金颗粒大，玻璃中的坑比金属合金中的坑浅，并且与金属合金样品相比，玻璃样品的损伤不太明显。对于这两种类型的样品，飞秒激光产生的ICP-MS信号比纳秒激光烧蚀更强烈，尽管玻璃样品在纳秒激光和飞秒激光烧蚀下的行为比金属合金更相似。
