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Nanostructured thin films as surface‐enhanced Raman scattering substrates
Author(s) -
Mura Stefania,
Greppi Gianfranco,
Innocenzi Plinio,
Piccinini Massimo,
Figus Cristiana,
Marongiu Maria Laura,
Guo Cunlan,
Irudayaraj Joseph
Publication year - 2013
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4151
Subject(s) - raman scattering , raman spectroscopy , materials science , nanoporous , thin film , nanoparticle , crystallite , mesoporous material , nanotechnology , rhodamine 6g , substrate (aquarium) , silver nanoparticle , analytical chemistry (journal) , chemical engineering , fluorescence , chemistry , optics , chromatography , physics , oceanography , engineering , geology , metallurgy , catalysis , biochemistry
Nanoporous thin films with silver nanoparticles were synthesized with a bottom–up approach, and its potential as effective surface‐enhanced Raman scattering (SERS) substrates was demonstrated. The use of mesoporous titania films as substrates allowed to control the growth of nanoparticles on the film surface. Atomic force microscopy measurements, Ultraviolet‐visible and X‐ray diffraction analysis confirmed the photoreduction of Ag + to Ag 0 with the formation of nanoparticles with crystallite dimensions of 32 to 36 nm. The new substrates allowed the detection of two analytes (rhodamine B isothiocyanate and cytochrome c ), present in solutions at very low concentrations, highlighting their potential in SERS sensing. Reproducibility, homogeneity, enhancement factor of the substrate, consistency of results and detection limits were also assessed. Copyright © 2012 John Wiley & Sons, Ltd.