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

Volume

8

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

786

Lastpage

790

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;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2008.923184

Filename

4529165