论文信息 - Fluctuation-Enhanced Sensing with Commercial Gas Sensors

Fluctuation-Enhanced Sensing with Commercial Gas Sensors

The stochastic component of the sensor signal in commercial semiconductor gas sensors during exposure to different gases has been studied. The resistance fluctuation measurements have been carried out using different concentrations of ethanol, CO, NO x , H 2 and SO 2 in dry synthetic air. The analysis of the stochastic resistance fluctuations in gas sensors during exposure to gases enables an enhanced sensitivity and selectivity. The normalized power spectrum is characteristic for each sensor, and each gas induces a new characteristic power spectrum. In many cases, sensors can be used even for different gases than the gas they were originally designed for.

Yingfeng Li | Laszlo B. Kish | Gary Seeton | José Solís

[1] K. Yoshikawa,et al. Gas Sensing Based on a Nonlinear Response: Discrimination between Hydrocarbons and Quantification of Individual Components in a Gas Mixture. , 1996, Analytical chemistry.

[2] Laszlo B. Kish,et al. Extracting information from noise spectra of chemical sensors: single sensor electronic noses and tongues , 2000 .

[3] Paolo Bruschi,et al. Gas and vapour effects on the resistance fluctuation spectra of conducting polymer thin-film resistors , 1994 .

[4] Udo Weimar,et al. Gas identification by modulating temperatures of SnO2-based thick film sensors , 1997 .

[5] L. Kish,et al. Identifying natural and artificial odours through noise analysis with a sampling-and-hold electronic nose , 2001 .

[6] John S. Suehle,et al. Optimized temperature-pulse sequences for the enhancement of chemically specific response patterns from micro-hotplate gas sensors , 1996 .

[7] Paolo Bruschi,et al. Vapour and gas sensing by noise measurements on polymeric balanced bridge microstructures , 1995 .