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Proceedings Paper

Surface enhanced Raman scattering of nitroexplosives on nontraditional substrates
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Paper Abstract

Surface Enhanced Raman Scattering (SERS) is normally obtained from nanoactive surfaces or colloids of group II-B metals, in particular of silver and gold. In this study another type of nanosurface has been explored seeking more reproducible Raman spectra than those obtained from metallic substrates. Compounds of elements of the fourth transition period were tested for SERS analysis of nitroexplosives. Titanium (IV) oxides were found to give good Raman Enhanced signals of target molecules. TNT and DNT increased their signal intensities for this technique and were evaluated for the increase in different excitation sources. Laser lines at 785, 532 and 514.5 nm were evaluated to determine relative SERS cross sections for various vibrational bands of the target nitroexplosives. Polymorphism seems to play an important role in the Raman signal enhancement when using metal oxides: high rutile percent mixtures with anatase gave higher Raman scattered signal enhancement.

Paper Details

Date Published: 20 May 2005
PDF: 9 pages
Proc. SPIE 5778, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense IV, (20 May 2005); doi: 10.1117/12.604202
Show Author Affiliations
Edwin De La Cruz-Montoya, Univ. of Puerto Rico/Mayaguez (United States)
Alejandro Blanco, Univ. of Puerto Rico/Mayaguez (United States)
Marcia Balaguera-Gelves, Univ. of Puerto Rico/Mayaguez (United States)
Leonardo Pacheco-Londono, Univ. of Puerto Rico/Mayaguez (United States)
Samuel P. Hernandez-Rivera, Univ. of Puerto Rico/Mayaguez (United States)


Published in SPIE Proceedings Vol. 5778:
Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense IV
Edward M. Carapezza, Editor(s)

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