Synthesis, characterization, and photoconductivity studies on nanocrystalline TiO2 films doped with gold nanoparticles

G. Valverde-Aguilar; J. A. García-Macedo; P. Galván-Ramírez; V. Rentería-Tapia

doi:10.1117/12.826730

1 September 2009 Synthesis, characterization, and photoconductivity studies on nanocrystalline TiO₂ films doped with gold nanoparticles

G. Valverde-Aguilar, J. A. García-Macedo, P. Galván-Ramírez, V. Rentería-Tapia

Author Affiliations +

Proceedings Volume 7393, Nanophotonic Materials VI; 73930X (2009) https://doi.org/10.1117/12.826730
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

Abstract

Nanocrystalline TiO₂ films doped with gold nanoparticles were synthesized by the sol-gel process at room temperature. The TiO₂ films were synthesized by using tetrabutyl orthotitanate as the inorganic precursor. The films were spin-coated on glass wafers. The samples were annealed at 100°C for 30 minutes and sintered at 520°C for 1 hour to generated anatase and rutile phases. The films were characterized using UV-Vis absorption spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. An absorption peak located at around 651 nm is due to the surface plasmon resonance of the gold nanoparticles. Optical absorption spectrum was fitted by Gans model by using a high refractive index (n_local = 2.6). This high index is related to the high content of anatase nanoparticles embedded in the film. Photoconductivity studies were performed on nanocrystalline (anatase phase) films. The experimental data were fitted with straight lines at darkness and under illumination at 515 nm and 645 nm. This indicates an ohmic behavior. Transport parameters were calculated. Results are discussed.

Citation Download Citation

G. Valverde-Aguilar, J. A. García-Macedo, P. Galván-Ramírez, and V. Rentería-Tapia "Synthesis, characterization, and photoconductivity studies on nanocrystalline TiO₂ films doped with gold nanoparticles", Proc. SPIE 7393, Nanophotonic Materials VI, 73930X (1 September 2009); https://doi.org/10.1117/12.826730

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available