Gold-Nanoparticle-Doped TiO2 Semiconductor Thin Films: Optical Characterization


  • Alessandro Martucci thanks the Universities of Melbourne and Padova for their support through the University academic exchange program, and MIUR through PRIN 2004 project. Jessica Pacifico is supported through ARC Grant DP 0558608. Paul Mulvaney thanks the University of Melbourne and the ARC for support through the Federation Fellowship program. This paper is the first in a series discussing gold-nanoparticle-doped TiO2 semiconductor thin films.


A simple procedure for creating titania sol–gel-based semiconductor thin films is described. Gold nanoparticles are doped homogeneously into the precursor mixture and the particles are homogeneously distributed in the resultant films when prepared using spin-coating. The effects of particle loading and annealing temperature on the optical properties of the resultant films are characterized. Ellipsometry, X-ray diffraction, atomic force microscopy, and surface plasmon spectroscopy are used to monitor the crystallization and porosity changes during film synthesis.