10 May 2006 Enhanced Raman scattering of nitro-explosives on nanoparticles substrates: Au-Ag alloy, tin oxide, and scandium oxide
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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.
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Jacqueline I. Jeréz Rozo, Jacqueline I. Jeréz Rozo, Marcia del Rocío Balaguera, Marcia del Rocío Balaguera, Andrea Cabanzo, Andrea Cabanzo, Edwin de la Cruz Montoya, Edwin de la Cruz Montoya, Samuel P. Hernández-Rivera, 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); doi: 10.1117/12.666053; https://doi.org/10.1117/12.666053

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