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Issue 5, 2013
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UV fs–ns double-pulse laser induced breakdown spectroscopy for high spatial resolution chemical analysis

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Abstract

We study the use of an ultraviolet (UV) femtosecond (fs)–nanosecond (ns) double-pulse scheme to improve the analytical capabilities of Laser Induced Breakdown Spectroscopy (LIBS) in the few-micron (<2 μm) spatial resolution regime. We show that a double-pulse orthogonal configuration can enhance the spectral emission intensity by roughly 360 times as compared to a single-fs laser pulse LIBS of silicon (Si). Although the spectral emission lifetime in single-pulse LIBS is less than 20 ns, the second pulse provides signal enhancement hundreds of nanoseconds later, indicating that a significant number of non-radiative species (neutrals and/or particles) exist in these small length-scale plasmas long after the fs-laser pulse is over. The double-pulse configuration is a practical way to improve the limits of detection of LIBS for micron/submicron spatial resolution.

Graphical abstract: UV fs–ns double-pulse laser induced breakdown spectroscopy for high spatial resolution chemical analysis

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Article information


Submitted
20 Oct 2012
Accepted
19 Mar 2013
First published
20 Mar 2013

J. Anal. At. Spectrom., 2013,28, 743-748
Article type
Paper

UV fs–ns double-pulse laser induced breakdown spectroscopy for high spatial resolution chemical analysis

Y. Lu, V. Zorba, X. Mao, R. Zheng and R. E. Russo, J. Anal. At. Spectrom., 2013, 28, 743
DOI: 10.1039/C3JA30315B

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