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Noise Spectroscopy of Gas Sensors

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8 Author(s)
Aroutiounian, Vladimir M. ; Dept. of Phys. of Semicond. & Microelectron., Yerevan State Univ., Yerevan ; Mkhitaryan, Z.H. ; Shatveryan, A.A. ; Gasparyan, F.V.
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We study current-voltages and low-frequency noise characteristics of the metal-porous silicon-silicon single crystal-metal structure with 50% and 73% porosity of porous silicon. The study is performed in dry air and in a mix of dry air with carbon monoxide of different concentrations. The Hooge noise parameter and the parameter in the frequency dependence of the noise voltage spectral density were determined from experimental data. High sensitivity of spectral dependence of noise to gas concentration allows offering powerful method for determination of gas concentration in the air or environment.

Published in:

Sensors Journal, IEEE  (Volume:8 ,  Issue: 6 )