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Nanostructured Tin Oxide as a Surface‐Enhanced Raman Scattering Substrate for the Detection of Nitroaromatic Compounds
Author(s) -
Vijayarangamuthu Kalimuthu,
Rath Shyama
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12266
Subject(s) - materials science , raman scattering , tin oxide , substrate (aquarium) , raman spectroscopy , doping , tin , oxide , nanostructure , nanotechnology , nanocomposite , analyte , chemical engineering , analytical chemistry (journal) , inorganic chemistry , optoelectronics , optics , metallurgy , organic chemistry , chromatography , oceanography , physics , chemistry , engineering , geology
Sensing of low concentrations of two nitroaromatic compounds, 1,2‐dinitrotoluene and 2‐nitrophenol, is presented. The sensing mechanism is based on surface‐enhanced Raman scattering ( SERS ) using nanostructured tin oxide as the SERS ‐active substrate. The SnO x nanostructures are synthesized by a simple solgel method and doped with Ag and Au. The Raman signal of a low concentration of the analyte, otherwise extremely weak, becomes significant when the analytes are attached to these substrates. Doping of SnO x nanopowders with Ag and Au leads to a further increase in the Raman intensities. This study demonstrates the scope of ceramic–metal nanocomposites as convenient solid‐state SERS sensors for low‐level detection.