Progress in fieldable laser-induced breakdown spectroscopy (LIBS)

Miziolek, Andrzej W.

doi:10.1117/12.919492

Cited by 146 publications

(197 citation statements)

References 24 publications

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“…This ps laser pulses are employed to produce the fast electron from the laser ablated zircaloy target for further excitation of He by the fast electron bombardment. This two-laser arrangement is different from the conventional double pulse experiments [20][21][22][23][24][25][26][27][28][29][30] where the two lasers are employed for direct ablation and further excitation of the ablated atoms. Although the ps laser is employed to serve the specific role of producing fast electrons from the target, its irradiation on the target will inevitably generate emission from the ablated atoms and the He atoms in the ambient gas near the target surface.…”

Section: Methodsmentioning

confidence: 99%

Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

et al. 2016

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A time-resolved spectroscopic study is performed on the enhancement signals of He gas plasma emission using nanosecond (ns) and picosecond (ps) lasers in an orthogonal configuration. The ns laser is used for the He gas plasma generation and the ps laser is employed for the ejection of fast electrons from a metal target, which serves to excite subsequently the He atoms in the plasma. The study is focused on the most dominant He I 587.6 nm and He I 667.8 nm emission lines suggested to be responsible for the He-assisted excitation (HAE) mechanism. The time-dependent intensity enhancements induced by the fast electrons generated with a series of delayed ps laser ablations are deduced from the intensity time profiles of both He emission lines. The results clearly lead to the conclusion that the metastable excited triplet He atoms are actually the species overwhelmingly produced during the recombination process in the ns laser-induced He gas plasma. These metastable He atoms are believed to serve as the major energy source for the delayed excitation of analyte atoms in ns laser-induced breakdown spectroscopy (LIBS) using He ambient gas.

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Section: Methodsmentioning

confidence: 99%

Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

et al. 2016

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“…Unlike the thermal mechanism present in ns laser desorption experiments, the energy from a fs laser pulse is deposited into the system (substrate and analyte) before the system can thermally respond [17]. This suggests that a fs laser pulse will allow the transfer of analyte into the gas phase without undergoing the decomposition anticipated if thermal equilibrium was obtained.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Amphiphilic Lipids and Hydrophobic Proteins Using Nonresonant Femtosecond Laser Vaporization with Electrospray Post-Ionization

Brady

Judge

Levis

2011

J. Am. Soc. Mass Spectrom.

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Amphiphilic lipids and hydrophobic proteins are vaporized at atmospheric pressure using nonresonant 70 femtosecond (fs) laser pulses followed by electrospray post-ionization prior to being transferred into a time-of-flight mass spectrometer for mass analysis. Measurements of molecules on metal and transparent dielectric surfaces indicate that vaporization occurs through a nonthermal mechanism. The molecules analyzed include the lipids 1-monooleoyl-rac-glycerol, 1,2-dihexanoyl-sn-glycero-3-phosphocholine, 1,2-dimyristoyl-sn-glycero-3-phosphocholine, and the hydrophobic proteins gramicidin A, B, and C. Vaporization of lipids from blood and milk are also presented to demonstrate that lipids in complex systems can be transferred intact into the gas phase for mass analysis.

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“…The interaction between focused laser pulses and the sample creates plasma composed of ionized matter [2]. Plasma light emissions can provide "spectral signatures" of chemical composition of many different kinds of materials in solid, liquid, or gas state [3]. LIBS can provide an easy, fast, and in situ chemical analysis with a reasonable precision, detection limits, and cost.…”

Section: Introductionmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

2012

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Laser-induced breakdown spectroscopy (LIBS) is a technique that provides an accurate in situ quantitative chemical analysis and, thanks to the developments in new spectral processing algorithms in the last decade, has achieved a promising performance as a quantitative chemical analyzer at the atomic level. These possibilities along with the fact that little or no sample preparation is necessary have expanded the application fields of LIBS. In this paper, we review the state of the art of this technique, its fundamentals, algorithms for quantitative analysis or sample classification, future challenges, and new application fields where LIBS can solve real problems.

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Progress in fieldable laser-induced breakdown spectroscopy (LIBS)

Cited by 146 publications

References 24 publications

Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

Signal enhancement of neutral He emission lines by fast electron bombardment of laser-induced He plasma

Analysis of Amphiphilic Lipids and Hydrophobic Proteins Using Nonresonant Femtosecond Laser Vaporization with Electrospray Post-Ionization

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

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