Deep Raman spectroscopy for the non-invasive standoff detection of concealed chemical threat agents

Emad L. Izake, Biju Cletus, William Olds, Shankaran Sundarajoo, Peter M. Fredericks, Esa Jaatinen

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Deep Raman spectroscopy has been utilized for the standoff detection of concealed chemical threat agents from a distance of 15 m under real life background illumination conditions. By using combined time and space resolved measurements, various explosive precursors hidden in opaque plastic containers were identified non-invasively. Our results confirm that combined time and space resolved Raman spectroscopy leads to higher selectivity towards the sub-layer over the surface layer as well as enhanced rejection of fluorescence from the container surface when compared to standoff spatially offset Raman spectroscopy. Raman spectra that have minimal interference from the packaging material and good signal-to-noise ratio were acquired within 5 s of measurement time. A new combined time and space resolved Raman spectrometer has been designed with nanosecond laser excitation and gated detection, making it of lower cost and complexity than picosecond-based laboratory systems.
Original languageEnglish
Pages (from-to)342-347
Number of pages6
JournalTalanta
Volume94
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • deep Raman
  • standoff detection
  • threat agents
  • national security
  • forensic investigations

Fingerprint Dive into the research topics of 'Deep Raman spectroscopy for the non-invasive standoff detection of concealed chemical threat agents'. Together they form a unique fingerprint.

  • Cite this

    Izake, E. L., Cletus, B., Olds, W., Sundarajoo, S., Fredericks, P. M., & Jaatinen, E. (2012). Deep Raman spectroscopy for the non-invasive standoff detection of concealed chemical threat agents. Talanta, 94, 342-347. https://doi.org/10.1016/j.talanta.2012.03.053