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首页> 外文期刊>Applied Surface Science >The influence of ablation carrier gasses Ar, He and Ne on the particle size distribution and transport efficiencies of laser ablation-induced aerosols: implications for LA-ICP-MS
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The influence of ablation carrier gasses Ar, He and Ne on the particle size distribution and transport efficiencies of laser ablation-induced aerosols: implications for LA-ICP-MS

机译：烧蚀载气Ar，He和Ne对激光烧蚀气溶胶的粒径分布和传输效率的影响：对LA-ICP-MS的影响

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摘要

The influence of ablation cell carrier gasses He, Ne and Ar on the particle size distribution generated and subsequently transported during the laser ablation process of silicate glasses was investigated using 266 and 193 nm wavelengths for ablation. The particle size distributions was determined for the NIST 600 series glasses and synthetic quartz glass using an optical particle counter within the size range of 0.1 to >2 mum. The results illustrate that the ablation carrier gas strongly influences the particle size distribution for lambda = 193 nm while this effect is far less pronounced for ablations using lambda = 266 nm. The experiments also show that 266 nm produces to a larger degree primary particles which are not largely influenced by the ablation carrier gas environment while 193 nm produces a larger amount of vapour during impact of the laser beam which subsequently condenses to form larger aggregates. These results verify and give the reason for the large increase in sensitivity obtainable by inductively coupled plasma mass spectrometry (ICP-MS) when using helium together with 193 nm ablation systems while only a minor increase will be observable when using 266 nm under similar conditions. Furthermore the influences of the laser energy density, on the particle size distribution as well as values for the transport efficiency were investigated. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 32]
机译：使用266和193 nm波长进行消融，研究了消融池载气He，Ne和Ar对在硅酸盐玻璃激光消融过程中生成并随后传输的粒度分布的影响。使用尺寸在0.1至> 2微米范围内的光学粒子计数器，确定了NIST 600系列玻璃和合成石英玻璃的粒径分布。结果表明，烧蚀载气对λ= 193 nm的粒径分布有很大影响，而对于使用λ= 266 nm的烧蚀，这种影响远不那么明显。实验还表明，266 nm产生较大程度的初级粒子，这些粒子在很大程度上不受烧蚀载气环境的影响，而193 nm在激光束的撞击过程中产生大量的蒸汽，随后凝结形成更大的聚集体。这些结果验证并给出了使用氦气与193 nm消融系统一起使用电感耦合等离子体质谱（ICP-MS）可获得的灵敏度大幅提高的原因，而在相似条件下使用266 nm时，只有很小的提高。此外，研究了激光能量密度对粒度分布以及传输效率值的影响。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：32]

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