Enhanced Raman scattering of nitro-explosives on nanoparticles substrates: Au-Ag alloy, tin oxide, and scandium oxide

Jacqueline I. Jeréz Rozo; Marcia del Rocío Balaguera; Andrea Cabanzo; Edwin de la Cruz Montoya; Samuel P. Hernández-Rivera

doi:10.1117/12.666053

10 May 2006 Enhanced Raman scattering of nitro-explosives on nanoparticles substrates: Au-Ag alloy, tin oxide, and scandium oxide

Jacqueline I. Jeréz Rozo, Marcia del Rocío Balaguera, Andrea Cabanzo, Edwin de la Cruz Montoya, Samuel P. Hernández-Rivera

Author Affiliations +

Proceedings Volume 6201, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense V; 62012G (2006) https://doi.org/10.1117/12.666053
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

Au/Ag and Ag/Ag alloy surface roughened consisting of various mole fractions of gold and silver have been synthesized in aqueous solution by the co-reduction of chlorauric acid (HAuCl) and silver nitrate (AgNO₃) with trisodium citrate. For the metallic alloys it was found that the maximum of the plasmon band shifts linearly towards the blue with increasing silver content. Metal nanoparticles could be used in applications such specificity sensors and substrates for Enhanced Raman Spectroscopy (ERS). A goal in the emerging field of nanotechnology is to make nanostructures or nanoarrays with a very large surface area. Crystalline SnO₂ and Sc₂O₃ were also used for ERS experiments. Tin (IV) oxide is widely applied as a sensor component as a consequence of the high sensitivity of its conductivity to the surrounding atmosphere. Scandium oxide has been used for high reflectance coatings for UV applications. Nanoparticles were characterization by UV-VIS Spectroscopy and Scanning Electron-Microscopy (SEM). The SEM has been used to provide microstructural information of coverage used. Nanoparticle structure and spectral and electronic properties of these systems may allow for applications in sensors development for the use in nitroaromatic explosive detection at the subpicograms range.

Citation Download Citation

Jacqueline I. Jeréz Rozo, Marcia del Rocío Balaguera, Andrea Cabanzo, Edwin de la Cruz Montoya, and Samuel P. Hernández-Rivera "Enhanced Raman scattering of nitro-explosives on nanoparticles substrates: Au-Ag alloy, tin oxide, and scandium oxide", Proc. SPIE 6201, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense V, 62012G (10 May 2006); https://doi.org/10.1117/12.666053

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