Trace Molecular Detection via Surface-Enhanced Raman Scattering and Surface-Enhanced Resonance Raman Scattering at a Distance of 15 Meters

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Abstract:

We report the first demonstration of surface-enhanced Raman spectroscopy (SERS) detection of para-mercapto benzoic acid (pMBA) and surface-enhanced resonance Raman spectroscopy (SERRS) detection of brilliant cresyl blue (BCB) and cresyl violet perchlorate (CVP) with continuous-wave excitation from a stand-off distance of 15 meters. We further report the first stand-off SERRS detection of BCB and CVP at that same distance in the presence of ambient fluorescent and incandescent/blackbody background light. These preliminary results suggest that it is possible to detect sub-nanomole amounts of material at reasonable distances with eye-safe laser powers using stand-off SERRS and serve as proof-of-concept highlighting the potential extension of stand-off Raman spectroscopy to include SERS and SERRS for remote, eye-safe chemical detection, analysis, and imaging in the presence of ambient background light.

Keywords: RAMAN SPECTROSCOPY; REMOTE DETECTION; SERRS; SERS; STAND-OFF DETECTION; SURFACE-ENHANCED RAMAN SPECTROSCOPY; SURFACE-ENHANCED RESONANCE RAMAN SPECTROSCOPY

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370210791211763

Affiliations: 1: Duke University, Fitzpatrick Institute for Photonics, Department of Biomedical Engineering and Department of Chemistry, 136 Hudson Hall, Box 90281, Durham, North Carolina 27708 2: Lawrence Livermore National Laboratory, M division/Forensic Science Center, 7000 East Ave, L-178, Livermore, California 94550 3: University of South Carolina, Department of Chemistry and Biochemistry, 631 Sumter Street, Columbia, South Carolina 29208

Publication date: May 1, 2010

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