Journal ArticleDOI
Effects of focal volume and spatial inhomogeneity on uncertainty in single-aerosol laser-induced breakdown spectroscopy measurements
TLDR
In this paper, two sets of optics were used to image different regions of a LIBS plasma and simultaneously collect spectra from single particles, and strong variation and lack of correlation between the two measurement channels suggest that emission from a single particle is localized within the plasma.Abstract:
Particle location with respect to the plasma volume and the focal volume of the collection optics is identified as an important source of uncertainty in single-aerosol laser-induced breakdown spectroscopy (LIBS) measurements. Two sets of optics were used to image different regions of a LIBS plasma and simultaneously collect spectra from single particles. Strong variation and lack of correlation between the two measurement channels suggest that emission from a single particle is localized within the plasma. Measurement precision and detection efficiency were improved by imaging a larger plasma region, thus integrating the spatially distributed signal.read more
Citations
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Journal ArticleDOI
Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma–Particle Interactions: Still-Challenging Issues Within the Analytical Plasma Community
David W. Hahn,Nicoló Omenetto +1 more
TL;DR: Basic diagnostics aspects of laser-induced breakdown spectroscopy are focused on and a review of the past and recent LIBS literature pertinent to this topic is presented and previous research on non-laser-based plasma literature, and the resulting knowledge, is emphasized.
Journal ArticleDOI
Laser Spectroscopy for Atmospheric and Environmental Sensing
Marc N. Fiddler,Israel Begashaw,Matthew A. Mickens,Michael S. Collingwood,Zerihun Assefa,Solomon Bililign +5 more
TL;DR: This review is focused on three areas of laser spectroscopic applications in atmospheric and environmental sensing; namely laser-induced fluorescence (LIF), cavity ring-down spectroscopy (CRDS), and photoluminescence (PL) techniques used in the detection of solids, liquids, aerosols, trace gases, and volatile organic compounds (VOCs).
Journal ArticleDOI
Plasma-particle interactions in a laser-induced plasma: implications for laser-induced breakdown spectroscopy.
V. Hohreiter,David W. Hahn +1 more
TL;DR: 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, and significant spatial nonhomogeneity persists on a comparable time scale.
Energy absorption and propagation in laser-created sparks - eScholarship
TL;DR: A spiky behavior is observed in the transmitted temporal profiles of lasers at higher energies and this is explained as due to the formation of a self-regulating regime.
Journal ArticleDOI
Development of an Aerosol Focusing-Laser Induced Breakdown Spectroscopy (Aerosol Focusing-LIBS) for Determination of Fine and Ultrafine Metal Aerosols
TL;DR: An Aerosol Focusing-Laser Induced Breakdown Spectroscopy (LIBS) with a sheath air focusing and an aerodynamic lens focusing was developed to determine elemental composition of fine and ultrafine metal aerosols as mentioned in this paper.
References
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Journal ArticleDOI
Laser-induced breakdown spectroscopy of bacterial spores, molds, pollens, and protein: initial studies of discrimination potential.
TL;DR: LIBS data from the individual laser shots were analyzed by principal-components analysis and were found to contain adequate information to afford discrimination among the different biomaterials.
Journal ArticleDOI
Detection of bacteria by time-resolved laser-induced breakdown spectroscopy
TL;DR: Time-resolved laser-induced breakdown spectroscopy (TRELIBS) exhibits a good ability to differentiate among all these species, whatever the culture medium, the species or the strain, and is expected to be a good candidate for a sensor of hazards either on surfaces or in ambient air.
Journal ArticleDOI
Laser-induced breakdown spectroscopy detection and classification of biological aerosols.
TL;DR: In this paper, a spectrally broadband laser-induced breakdown spectroscopy (LIBS) system was used for laboratory measurements on some common biological agent simulants, which were compared to those of common, naturally occurring biological aerosol components (pollen and fungal spores) to determine the potential of LIBS for discriminating biological agents from natural background aerosols.
Proceedings Article
Laser induced breakdown spectroscopy for the detection and classification of biological aerosols
TL;DR: A principal components analysis illustrates that linear combinations of the detected atomic lines, which are present in different ratios in each of the samples tested, can be used to discriminate biological agent simulants from other biological matter.
Journal ArticleDOI
On-line analysis of ambient air aerosols using laser-induced breakdown spectroscopy
TL;DR: In this paper, the authors used laser-induced breakdown spectroscopy (LBS) for the detection of aerosols in ambient air, including quantitative mass concentration measurements and size/composition measurements of individual aerosol particles.
Related Papers (5)
Detection and Analysis of Aerosol Particles by Laser-Induced Breakdown Spectroscopy
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Feasibility of detection and identification of individual bioaerosols using laser-induced breakdown spectroscopy.
P B Dixon,David W. Hahn +1 more