Analytical fluctuation enhanced sensing by resistive gas sensors

Robert Macku; Janusz Smulko; Pawel Koktavy; Maciej Trawka; Petr Sedlak

doi:10.1016/j.snb.2015.02.114

Analytical fluctuation enhanced sensing by resistive gas sensors

Abstract

Resistance fluctuations across polarised resistive gas sensors were studied in detail to evaluate sensor working conditions for detecting methane and ammonia at various concentrations. The 1/f noise component typically dominates other noise sources up to a few kHz and can be utilised to improve gas selectivity when compared with measurements of the sensor DC resistance. The Arrhenius plot was created and the activation energy for the investigated gases was evaluated. Using this method, different ambient gases can be potentially detected only by means of a single commercial Taguchi gas sensor and 1/f noise measurements at different temperatures of the gas sensing layer without a need of intense computations to get reliable results.

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Authors (5)

Robert Macku
- Brno University of Technology Department of Physics
Janusz Smulko prof. dr hab. inż.
Pawel Koktavy
- Brno University of Technology Department of Physics
Maciej Trawka dr inż.
Petr Sedlak
- Brno University of Technology Department of Physics

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: SENSORS AND ACTUATORS B-CHEMICAL no. 213, pages 390 - 396,
ISSN: 0925-4005
Language:: English
Publication year:: 2015
Bibliographic description:: Macku R., Smulko J., Koktavy P., Trawka M., Sedlak P.: Analytical fluctuation enhanced sensing by resistive gas sensors// SENSORS AND ACTUATORS B-CHEMICAL. -Vol. 213, (2015), s.390-396
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.snb.2015.02.114
Verified by:: Gdańsk University of Technology