Deep Raman spectroscopy for the non-invasive standoff detection of concealed chemical threat agents
Izake, Emad L., Cletus, Biju, Olds, William J., Sundarajoo, Shankaran, Fredericks, Peter M., & Jaatinen, Esa (2012) Deep Raman spectroscopy for the non-invasive standoff detection of concealed chemical threat agents. Talanta, 94, pp. 342-347.
Deep Raman spectroscopy has been utilized for the standoff detection of concealed chemical threat agents from a distance of 15 meters 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 seconds 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.
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|Item Type:||Journal Article|
|Keywords:||Deep Raman, standoff detection, threat agents, national security, forensic investigations|
|Subjects:||Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > OTHER CHEMICAL SCIENCES (039900) > Forensic Chemistry (039902)
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2012 Elsevier|
|Copyright Statement:||This is the author’s version of a work that was accepted for publication in Talanta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Talanta, Volume 94, (2012) DOI: 10.1016/j.talanta.2012.03.053|
|Deposited On:||26 Mar 2012 22:39|
|Last Modified:||11 Sep 2013 03:13|
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