Laser-induced breakdown spectroscopy with laser irradiation on mid-infrared hydride stretch transitions: polystyrene

An investigation of laser-induced breakdown spectroscopy (LIBS) of a polymer (polystyrene) with laser irradiation in the mid-infrared (mid-IR) spectral region is presented. A particular goal of this study is to determine whether the LIBS signals are enhanced when the laser wavelength is tuned to that of a vibrational transition of the polymer. Significant enhancements were indeed observed upon irradiation on the C–H stretch fundamental vibrational transitions. In addition, mode-specific effects were observed; the signals were stronger, compared to the relative intensities in the one-photon absorption spectrum, for irradiation on the aromatic (phenyl) C–H stretch transitions, rather than those involving aliphatic (backbone) C–H modes. The applicability of mid-IR resonance enhanced LIBS for detection of residues on surfaces is discussed.

[1]  Stefano Legnaioli,et al.  In situ study of the Porticello Bronzes by portable X-ray fluorescence and laser-induced breakdown spectroscopy ☆ , 2007 .

[2]  D. E. Kim,et al.  Quantitative Analysis of Aluminum Impurities in Zinc Alloy by Laser-Induced Breakdown Spectroscopy , 1997 .

[3]  Laser-Induced Breakdown Spectra in the Infrared Region from 750 to 2000 nm Using a Cooled InGaAs Diode Array Detector , 2007, Applied spectroscopy.

[4]  Andrew I. Whitehouse,et al.  Test of a stand-off laser-induced breakdown spectroscopy sensor for the detection of explosive residues on solid surfaces , 2006 .

[5]  Jin Yu,et al.  Remote LIBS with ultrashort pulses: characteristics in picosecond and femtosecond regimes , 2004 .

[6]  J. Hornkohl,et al.  Time-resolved spectroscopy measurements of hydrogen-alpha, -beta, and -gamma emissions. , 2008, Applied optics.

[7]  Israel Schechter,et al.  Laser-induced breakdown spectroscopy (LIBS) : fundamentals and applications , 2006 .

[8]  R. A. McGill,et al.  Effect of ablation parameters on infrared pulsed laser deposition of poly(ethylene glycol) films , 2002 .

[9]  E. Therssen,et al.  IR wavelength-selective laser desorption via OH and CH stretching modes , 2006 .

[10]  Gang Li,et al.  The HITRAN 2008 molecular spectroscopic database , 2005 .

[11]  D. Cremers,et al.  Handbook of Laser-Induced Breakdown Spectroscopy: Cremers/Handbook of Laser-induced Breakdown Spectroscopy , 2006 .

[12]  William L. Barr,et al.  Spectral Line Broadening by Plasmas , 1975, IEEE Transactions on Plasma Science.

[13]  D. M. Bubb,et al.  Mode-specific effects in resonant infrared ablation and deposition of polystyrene , 2006 .

[14]  Alan C. Samuels,et al.  Mid-Infrared Laser-Induced Breakdown Spectroscopy Emissions from Alkali Metal Halides , 2008, Applied spectroscopy.

[15]  J. Cooper,et al.  Hydrogen Stark-Broadening Tables , 1973 .

[16]  Roberto Teghil,et al.  Laser Induced Breakdown Spectroscopy methodology for the analysis of copper-based-alloys used in ancient artworks , 2008 .

[17]  P. Dagdigian,et al.  Comparison of IR and UV cavity ring-down spectroscopy detection of transient intermediates: pyrolysis of methyl azide to form methyleneimine. , 2007, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[18]  E. Therssen,et al.  IR laser resonant desorption of polycyclic aromatic hydrocarbons , 2006 .

[19]  Salman Rosenwaks,et al.  Emission following laser-induced breakdown spectroscopy of organic compounds in ambient air. , 2003, Applied optics.

[20]  Jin Yu,et al.  Time-resolved ultraviolet laser-induced breakdown spectroscopy for organic material analysis ☆ , 2007 .

[21]  Leon J. Radziemski,et al.  Handbook of Laser-Induced Breakdown Spectroscopy , 2006 .

[22]  Hackjin Kim,et al.  Vibrational relaxation and vibrational cooling in low temperature molecular crystals , 1988 .

[23]  P. Dagdigian,et al.  Comparison of laser-induced breakdown spectra of organic compounds with irradiation at 1.5 and 1.064 microm. , 2008, Applied optics.

[24]  J. Lewis,et al.  Electron number density and temperature measurement in a laser-induced hydrogen plasma , 1995 .

[25]  Frank C. De Lucia,et al.  Strategies for residue explosives detection using laser-induced breakdown spectroscopy , 2008 .

[26]  Karen J. Olsen,et al.  NIST Atomic Spectra Database (version 2.0) , 1999 .

[27]  A. Miziolek,et al.  Double pulse laser-induced breakdown spectroscopy of explosives: Initial study towards improved discrimination☆ , 2007 .

[28]  J. B. Lambert,et al.  Organic Structural Spectroscopy , 1998 .

[29]  W. Scheiber,et al.  The Density, Thermal Expansion, Vapor Pressure, and Refractive Index of Styrene, and the Density and Thermal Expansion of Polystyrene , 1939 .

[30]  D. Crosley,et al.  In uence of ambient conditions on the laser air spark , 1996, Laser Applications to Chemical, Security and Environmental Analysis.