Nanostructured thin films as surface-enhanced Raman scattering substrates

Stefania Mura, Gianfranco Greppi, Plinio Innocenzi, Massimo Piccinini, Cristiana Figus, Maria Laura Marongiu, Cunlan Guo, Joseph Irudayaraj

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)35-40
Number of pages6
JournalJournal of Raman Spectroscopy
Issue number1
StatePublished - Jan 1 2013
Externally publishedYes


  • Raman
  • SERS
  • mesoporous materials
  • nanomaterials
  • silver NPs

ASJC Scopus subject areas

  • Materials Science(all)
  • Spectroscopy


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