STABILITY AND OXIDATION OF THE SANDWICH-TYPE GAS SENSORS BASED ON THIN METAL-FILMS

Authors
GALDIKAS A KACIULIS S MATTOGNO G MIRONAS A SENULIENE D SETKUS A
Citation
A. Galdikas et al., STABILITY AND OXIDATION OF THE SANDWICH-TYPE GAS SENSORS BASED ON THIN METAL-FILMS, Sensors and actuators. B, Chemical, 48(1-3), 1998, pp. 376-382
Citations number
6
Categorie Soggetti
Electrochemistry,"Chemistry Analytical","Instument & Instrumentation
Journal title
Sensors and actuators. B, Chemical → ACNP
ISSN journal
09254005
Volume
48
Issue
1-3
Year of publication
1998
Pages
376 - 382
Database
ISI
SICI code
0925-4005(1998)48:1-3<376:SAOOTS>2.0.ZU;2-W
Abstract
The stability of the properties is investigated in the new family of t he solid-state gas sensors based on various thin metal films (Pt, Au, Ni, Mo) with the modifying top layer of tin oxide. The resistance resp onse to exposure to gas is demonstrated being stable within certain in terval of temperatures. The limits of the interval depend on the metal selected for the basic layer. The variation of the chemical compositi on is also studied in the sensors after overheating in the clean or co ntaminated air. The drift of the electric resistance and the mechanism of gas sensitivity are discussed on the basis of the oxidation of the metal film. (C) 1998 Elsevier Science S.A. All rights reserved.