Vadillo J M, Milán M, Laserna J J
Faculty of Sciences, Department of Analytical Chemistry, University of Málaga, E-29071, Málaga, Spain.
Anal Bioanal Chem. 1996 Apr;355(1):10-5. doi: 10.1007/s0021663550010.
Space and time-resolved studies of laser induced plasmas in air at atmospheric pressure are presented. Photovoltaic solar cells have been used as samples. The second harmonic (532 nm) of a Nd : YAG laser at an irradiance of 18 x 10(12) W/cm(2) has been used. The precise focus of the beam allows a microanalysis at a 0.02 mm(2) surface area working in single-shot mode. The use of an intensified charge-coupled device (CCD) detector has allowed time-resolved studies in both imaging or spectroscopy modes. The two-dimensional capability of the CCD has enabled the study of atomic and ionic species distribution along the plume. Most data have been recorded using single-laser shot experiments. Spectral lines have been assigned to transitions in atomic components of the material under investigation in the neutral or ionic states of the corresponding atoms. Effects of delay in improving spectral resolution and some examples of spectral characterization of species as a function of its decay are shown.
本文介绍了对大气压下空气中激光诱导等离子体的空间和时间分辨研究。光伏太阳能电池被用作样品。使用了波长为532nm、辐照度为18×10¹²W/cm²的Nd:YAG激光的二次谐波。光束的精确聚焦使得能够在0.02mm²的表面积上以单次模式进行微分析。使用增强型电荷耦合器件（CCD）探测器实现了成像或光谱模式下的时间分辨研究。CCD的二维能力使得能够研究沿羽流的原子和离子物种分布。大多数数据是通过单激光脉冲实验记录的。光谱线已被指定为所研究材料的原子成分在相应原子的中性或离子态下的跃迁。展示了延迟对提高光谱分辨率的影响以及作为物种衰变函数的物种光谱表征的一些示例。
