Title :
Noise Spectroscopy of Gas Sensors
Author :
Aroutiounian, Vladimir M. ; Mkhitaryan, Zara H. ; Shatveryan, Arkady A. ; Gasparyan, Ferdinand V. ; Ghulinyan, Mher Zh ; Pavesi, Lorenzo ; Kish, Laszlo B. ; Granqvist, Claes-Göran
Author_Institution :
Dept. of Phys. of Semicond. & Microelectron., Yerevan State Univ., Yerevan
fDate :
6/1/2008 12:00:00 AM
Abstract :
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.
Keywords :
gas sensors; Hooge noise; carbon monoxide; gas sensors; low-frequency noise characteristics; metal-porous silicon-silicon single crystal-metal structure; noise spectroscopy; noise voltage spectral density; noise-gas concentration; Chemical sensors; Gas detectors; Low-frequency noise; Noise measurement; Semiconductor device noise; Sensor phenomena and characterization; Silicon; Spectroscopy; Voltage; Working environment noise; Carbon monoxide; current-voltage characteristics; gas sensor; noise spectral density; porous silicon (PS); selectivity; sensitivity;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2008.923184
