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Proceedings Paper

Sol-gel film optochemical sensor based on surface plasmon resonance
Author(s): Zhengtian Gu; Peihui Liang; Weiqing Zhang
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Paper 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.

Paper Details

Date Published: 12 December 2001
PDF: 4 pages
Proc. SPIE 4540, Sensors, Systems, and Next-Generation Satellites V, (12 December 2001); doi: 10.1117/12.450688
Show Author Affiliations
Zhengtian Gu, Shanghai Univ. of Science and Technology (China)
Peihui Liang, Shanghai Institute of Optics and Fine Mechanics (China)
Weiqing Zhang, Shanghai Institute of Optics and Fine Mechanics (China)

Published in SPIE Proceedings Vol. 4540:
Sensors, Systems, and Next-Generation Satellites V
Hiroyuki Fujisada; Joan B. Lurie; Konradin Weber; Joan B. Lurie; Konradin Weber, Editor(s)

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