20 May 2005 Surface enhanced Raman scattering of nitroexplosives on nontraditional substrates
Author Affiliations +
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.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Edwin De La Cruz-Montoya, Alejandro Blanco, Marcia Balaguera-Gelves, Leonardo Pacheco-Londono, Samuel P. Hernandez-Rivera, "Surface enhanced Raman scattering of nitroexplosives on nontraditional substrates", 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; https://doi.org/10.1117/12.604202
PROCEEDINGS
9 PAGES


SHARE
KEYWORDS
Raman spectroscopy

Raman scattering

Surface enhanced Raman spectroscopy

Crystals

Oxides

Explosives

Metals

Back to Top