Plasma-particle interactions in a laser-induced plasma: Implications for laser-induced breakdown spectroscopy

V. Hohreiter, D. W. Hahn

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

The interaction between laser-induced plasmas and individual particles controls the rate of particle dissociation and subsequent atomic diffusion and emission processes, with implications for single-particle spectroscopy, as well as materials synthesis and other plasma sources. It is demonstrated through quantitative plasma imaging studies that discrete particles dissociate on a time scale of tens of microseconds within plasmas formed by 300-mJ Nd: YAG laser pulses. Significant spatial nonhomogeneity, as measured by localized atomic emission from particle-derived calcium atoms, persists on a comparable time scale, providing a measure of their average atomic diffusion rate of 0.04 m 2/s. In addition, the resulting calcium atomic emission is explored using image analysis as well as traditional spectroscopic analysis.

Original languageEnglish (US)
Pages (from-to)1509-1514
Number of pages6
JournalAnalytical Chemistry
Volume78
Issue number5
DOIs
StatePublished - Mar 1 2006
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry

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