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Proceedings Paper

TiO2 sol-gel thin films containing Au and Pt nanoparticles with controlled morphology: optical study and gas sensing properties
Author(s): Enrico Della Gaspera; Dario Buso; Michael L. Post; Alessandro Martucci
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Paper Abstract

Au and Pt nanoparticles are prepared with colloidal techniques in order to achieve high morphological quality, capped with a polymer and then embedded inside a TiO2 sol-gel matrix, resulting in a homogeneous dispersion of both metal colloids, confirmed by TEM analyses. Refractive index values measured with ellipsometry increase with the annealing temperature, with quite a linear trend, and at the same time the Au surface plasmon resonance peak undergoes a red shift: the refractive index evaluated from the Au plasmon band is slightly lower than the measured value, indicating that the refractive index just around metal particles is different from the average of the matrix, likely because of the polymeric capping agent. Optical gas sensing tests towards CO and H2 are presented as one of the possible applications of these nanocomposites.

Paper Details

Date Published: 13 May 2010
PDF: 8 pages
Proc. SPIE 7726, Optical Sensing and Detection, 77260I (13 May 2010); doi: 10.1117/12.854544
Show Author Affiliations
Enrico Della Gaspera, Univ. di Padova (Italy)
Dario Buso, Swinburne Univ. of Technology (Australia)
CSIRO (Australia)
Michael L. Post, National Research Council Canada (Canada)
Alessandro Martucci, Univ. di Padova (Italy)

Published in SPIE Proceedings Vol. 7726:
Optical Sensing and Detection
Francis Berghmans; Anna Grazia Mignani; Chris A. van Hoof, Editor(s)

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