TRANSIENT EFFECTS OF TIN OXIDE CO SENSORS IN THE PRESENCE OF WATER-VAPOR

被引：15
作者：
VLACHOS, DS
SKAFIDAS, PD
AVARITSIOTIS, JN
机构：
[1] National Technical University of Athens, Electrical Engineering Department, Division of Computer Engineering, Athens
来源：
APPLIED PHYSICS LETTERS | 1993年 / 63卷 / 13期
关键词：
D O I：
10.1063/1.110706
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
During the experimental study of CO sensitivity of SnO2 resistive-type gas sensors in the presence of water vapor, a transient effect was observed which elucidates the CO sensing mechanism in tin oxide. More precisely, after the removal of CO, an increase of the measured conductance was observed, depending on substrate temperature. An explanation of this phenomenon is proposed, which is based on the conductance modulation due to three different mechanisms: Formate desorption, occupation of lattice sites by oxygen molecules, and diffusion of lattice oxygen vacancies to sensor's bulk.
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页码：1760 / 1761
页数：2
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