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Detection of Explosives Using Differential Laser-Induced Perturbation Spectroscopy with a Raman-based Probe.

Erman K Oztekin1, Dallas J Burton2, David W Hahn3

  • 1Department of Mechanical & Aerospace Engineering, University of Florida, Gainesville, FL, USA.

Applied Spectroscopy
|February 12, 2016
PubMed
Summary

Differential laser-induced perturbation spectroscopy (DLIPS) offers a novel, noninvasive method for explosives detection. This technique enhances Raman spectroscopy for identifying compounds like TNT, RDX, HMX, and PETN, even on common backgrounds.

Keywords:
ChemometricsExplosives detectionPerturbationRaman spectroscopy

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Materials Science

Background:

  • Traditional Raman spectroscopy faces limitations in explosives detection sensitivity.
  • Developing noninvasive, sensitive methods for detecting explosives is crucial for security applications.
  • Molecular structure analysis is key to identifying explosive compounds.

Purpose of the Study:

  • To introduce and evaluate differential laser-induced perturbation spectroscopy (DLIPS) for explosives detection.
  • To enhance the capabilities of Raman spectroscopy for identifying explosive materials.
  • To assess the performance of DLIPS against traditional Raman scattering methods.

Main Methods:

  • Utilized differential laser-induced perturbation spectroscopy (DLIPS) on thin films of TNT, RDX, HMX, and PETN.
  • Employed deep ultraviolet laser perturbation combined with a differential Raman sensing scheme.
  • Applied Principal Components Analysis (PCA) for quantitative analysis and benchmarking against traditional Raman scattering.

Main Results:

  • DLIPS demonstrated enhanced detection capabilities for explosives compared to traditional Raman scattering.
  • Photo-induced effects on the molecular structures of explosives were analyzed in detail.
  • Successful detection of TNT was achieved on nylon and polyester substrates, indicating real-world applicability.

Conclusions:

  • DLIPS is a promising noninvasive technique for explosives screening.
  • The method shows potential for detecting explosives in diverse, real-world environments and backgrounds.
  • DLIPS offers an enhanced approach to spectral analysis for security applications.