Title :
Measurements in transient regimes after steep humidity changes: a method for investigating the reaction sites in SnO2 gas sensors
Author :
Ionescu, R. ; Vancu, A. ; Tomescu, A.
Author_Institution :
Nat. Inst. of Mater. Phys., Bucharest, Romania
Abstract :
Most information about the gas-sensing properties of polycrystalline tin dioxide in the usual commercial gas-sensors is furnished only by steady-state conductance measurements. However many aspects of the surface-gas interaction, and thus of the operation of gas sensors are still unclear. Broadening the field of experimental methods for investigating surface phenomena is therefore very necessary
Keywords :
electric admittance measurement; gas sensors; humidity; semiconductor materials; surface chemistry; tin compounds; transients; SnO2; SnO2 gas sensors; conductance measurements; gas sensor operation; gas-sensing properties; polycrystalline samples; reaction sites; steep humidity changes; surface phenomena; surface-gas interaction; transient regimes; Conducting materials; Gas detectors; Gases; Humidity measurement; Hydrogen; Performance evaluation; Physics; Sensor phenomena and characterization; Steady-state; Tin;
Conference_Titel :
Semiconductor Conference, 1999. CAS '99 Proceedings. 1999 International
Conference_Location :
Sinaia
Print_ISBN :
0-7803-5139-8
DOI :
10.1109/SMICND.1999.810583
