Surface plasmon resonance (SPR) was explored as optical transduction technique for monitoring the response of TiO2 thin films as sensing layers for alcohol vapours. Organic solutions of surfactant-capped TiO 2 nanocrystals were prepared by means of a colloidal chemistry route, and used as precursors for depositing the sensing layer onto Au/glass substrates. The sensing properties of the active material were examined in relation to the morphological features of both as-deposited and thermally annealed films and to the presence of the organic passivating shell on the TiO2 nanocrystals surface. Untreated titania thin films exhibited a high and reproducible SPR response to alcohol vapours than the corresponding organic-free material. A beneficial role in the sensing process may therefore be attributed to the organic passivating layer on the nanocrystals surface.

Investigation on alcohol vapours/TiO2 nanocrystal thin films interaction by SPR technique for sensing application

CURRI M. L.;AGOSTIANO A.;
2004

Abstract

Surface plasmon resonance (SPR) was explored as optical transduction technique for monitoring the response of TiO2 thin films as sensing layers for alcohol vapours. Organic solutions of surfactant-capped TiO 2 nanocrystals were prepared by means of a colloidal chemistry route, and used as precursors for depositing the sensing layer onto Au/glass substrates. The sensing properties of the active material were examined in relation to the morphological features of both as-deposited and thermally annealed films and to the presence of the organic passivating shell on the TiO2 nanocrystals surface. Untreated titania thin films exhibited a high and reproducible SPR response to alcohol vapours than the corresponding organic-free material. A beneficial role in the sensing process may therefore be attributed to the organic passivating layer on the nanocrystals surface.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11586/10569
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 57
  • ???jsp.display-item.citation.isi??? 50
social impact