Authors: A Khachatrian P J Dagdigian
Publish Date: 2009/05/15
Volume: 97, Issue: 1, Pages: 243-248
Abstract
An investigation of laserinduced breakdown spectroscopy LIBS of a polymer polystyrene with laser irradiation in the midinfrared midIR 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 modespecific effects were observed the signals were stronger compared to the relative intensities in the onephoton absorption spectrum for irradiation on the aromatic phenyl C–H stretch transitions rather than those involving aliphatic backbone C–H modes The applicability of midIR resonance enhanced LIBS for detection of residues on surfaces is discussed
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