TiO2 sol-gel films have been doped with colloidal gold nanoparticles (NPs) and used as a platform for optical and conductometric gas sensors for CO and H2 detection. Optical gas sensors of this type require an operating temperature above 300 °C. Measurements performed at 360 °C showed a reversible gas-induced variation of absorption spectra for both CO and H2. The variation in absorbance depends on testing wavelength and film annealing temperature. Conductometric gas sensors showed excellent performances toward H2 detection with a dynamic response close to ideal.
Optical and conductometric gas sensing properties of sol-gel TiO2 films doped with Au nanoparticles
BUSO, DARIO;MARTUCCI, ALESSANDRO;
2008
Abstract
TiO2 sol-gel films have been doped with colloidal gold nanoparticles (NPs) and used as a platform for optical and conductometric gas sensors for CO and H2 detection. Optical gas sensors of this type require an operating temperature above 300 °C. Measurements performed at 360 °C showed a reversible gas-induced variation of absorption spectra for both CO and H2. The variation in absorbance depends on testing wavelength and film annealing temperature. Conductometric gas sensors showed excellent performances toward H2 detection with a dynamic response close to ideal.File in questo prodotto:
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