Sol-gel film optochemical sensor based on surface plasmon resonance

Zhengtian Gu; Peihui Liang; Weiqing Zhang

doi:10.1117/12.450688

12 December 2001 Sol-gel film optochemical sensor based on surface plasmon resonance

Zhengtian Gu, Peihui Liang, Weiqing Zhang

Author Affiliations +

Proceedings Volume 4540, Sensors, Systems, and Next-Generation Satellites V; (2001) https://doi.org/10.1117/12.450688
Event: International Symposium on Remote Sensing, 2001, Toulouse, France

Abstract

The sol-gel derived metal oxide semiconductor films have been used as sensing medium in the opto-chemical sensor based on SPR for the first time. Data simulation shows that the sensitivity of this scheme to refractive index of the films is predicted to be more than 10⁵. By adding an intermediate layer between the metal films and the sensing films, optimizing the optical parameters, the sensitivity of this sensor with optimal optical parameters can increase by 40% over that of only sensing films. Experimentally, we have selected SnO₂ and SiO₂ films as sensing and intermediate layers, and made the gas sensing tests to NH₃, C₂H₅OH and C₃H₈. The sensor with optimized structure has a higher sensitivity, and the detection limits for these gases are available to 10^-1 ppm.

Citation Download Citation

Zhengtian Gu, Peihui Liang, and Weiqing Zhang "Sol-gel film optochemical sensor based on surface plasmon resonance", Proc. SPIE 4540, Sensors, Systems, and Next-Generation Satellites V, (12 December 2001); https://doi.org/10.1117/12.450688

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