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20 May 2005 Functionalization of nitroexplosives for surface-enhanced resonance Raman spectroscopy of silver colloids
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Silver colloids have been used for detecting single molecules in solution with high sensitivity and molecular specificity. Single particle detection is of great scientific and practical interest in many fields such as chemistry, biology, medicine and environmental science. We report the Surface Enhanced Resonance Raman Scattering (SERRS) spectrum of derivatized dye-TNT and DNT at a concentration level of 1x10-9 M in silver colloids at pH 9 at 532 nm for three 10 second intervals at different power intensities by suppressing the solvent of the colloid and obtaining nanoparticle to be diluted in another solvent or for mixing with another compound that has affinity for DNT. The azo structures obtained by derivatizing the TNT and DNT are highly colored derivatives, which contain a functionality that will enable a strong bond with the metal surface. The objective of this study is to modify silver colloids by using compounds such as adenine and the modified compounds are structurally similar to the ones that are going to be further studied in the colloid systems and were utilized for SERRS to increase the Raman signal from TNT and DNT.
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Marcia del Rocio Balaguera, Edwin de La Cruz Montoya, Miguel E. Castro, Luis A. Rivera-Montalvo, and Samuel P. Hernandez-Rivera "Functionalization of nitroexplosives for surface-enhanced resonance Raman spectroscopy of silver colloids", Proc. SPIE 5778, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense IV, (20 May 2005);

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