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Nanostructured thin films as surface-enhanced Raman scattering substrates

Mura, Stefania and Greppi, Gianfranco and Innocenzi, Plinio and Piccinini, Massimo and Figus, Cristiana and Marongiu, Maria Laura and Guo, Cunlan and Irudayaraj, Joseph (2013) Nanostructured thin films as surface-enhanced Raman scattering substrates. Journal of Raman Spectroscopy, Vol. 44 (1), p. 35-40. eISSN 1097-4555. Article.

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DOI: 10.1002/jrs.4151

Abstract

Nanoporous thin films with silver nanoparticles were synthesized with a bottom–up approach, and its potential as effective surfaceenhanced 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 Ag0 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.

Item Type:Article
ID Code:8080
Status:Published
Refereed:Yes
Uncontrolled Keywords:Nanomaterials, SERS, Raman, mesoporous materials, silver NPs
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/20 Zoocolture
Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 Scienza e tecnologia dei materiali
Area 07 - Scienze agrarie e veterinarie > AGR/19 Zootecnica speciale
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > Porto Conte Ricerche, Alghero
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Architettura, Design e Urbanistica
001 Università di Sassari > 02 Centri > Centro interdipartimentale Nucleo di ricerca sulla desertificazione
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Publisher:John Wiley & Sons
eISSN:1097-4555
Deposited On:23 Oct 2012 10:57

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