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dc.contributor.authorVinesh Rana, M.A.-
dc.contributor.authorCañamares, María Vega-
dc.contributor.authorKubic, Thomas-
dc.contributor.authorLeona, Marco-
dc.contributor.authorLombardi, John R.-
dc.identifierdoi: 10.1111/j.1556-4029.2010.01562.x-
dc.identifierissn: 0022-1198-
dc.identifier.citationJournal of Forensic Sciences 56: 200- 207 (2011)-
dc.description.abstractWe obtain the normal Raman and surface-enhanced Raman spectrum of three controlled substances: morphine, codeine, and hydrocodone. The spectra are assigned with the aid of density functional theory. Because of rather intense fluorescence, normal Raman spectra suffer from poor signal-to-noise, even when differential subtraction techniques are employed. On the other hand, surface enhancement by Ag nanoparticles both enhances the Raman signal and suppresses the fluorescence, enabling far more sensitive detection and identification. We also present a set of discriminant bands, useful for distinguishing the three compounds, despite the similarities in their structures.-
dc.description.sponsorshipThis work was supported by the National Institute of Justice (Department of Justice Award No. 2006-DN-BX-K034) and the City University Collaborative Incentive Program (No. 80209). This work was also supported by the National Science Foundation under Cooperative Agreement No. RII-9353488, Grants No. CHE-0091362, CHE-0345987, and No. ECS0217646. Additionally, it was supported by the City University of New York PSCBHE Faculty Research Award Program. Scientific research work at the Metropolitan Museum of Art was supported in part by grants from the Andrew W. Mellon Foundation, the David H. Koch Family Foundation, and the National Science Foundation Grant IMR 052692.-
dc.publisherAmerican Society for Testing Materials-
dc.titleSurface-enhanced Raman Spectroscopy for Trace Identification of Controlled Substances: Morphine, Codeine, and Hydrocodone-
dc.description.versionPeer Reviewed-
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