Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 255, Issue -, Pages 1911-1919Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.08.206
Keywords
Power-law response; Transducer and receptor functions; Gas sensor
Funding
- National Natural Science Foundation of China [61501167]
- Natural Science Foundation of Tianjin [15JCYBJC52100]
- Natural Science Foundation of Hebei [F2016202214]
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This study presents a theoretical investigation of the power-law response of metal oxide semiconductor gas sensors which is characterized by a linear dependence of the sensor resistance on gas pressure or concentration in double-logarithmic plots. The connection of sensor resistance with the gas partial pressure is realized by a set of differential equations, which describe the receptor and transducer functions of metal oxide semiconductor sensors. Then, the power-law response based on the two functions has been derived to oxygen, reducing and oxidizing gases, respectively. The basic mechanism of the power-law response has been theoretically explained and found to be well consistent with our experimental results and with literature reports. (C) 2017 Elsevier B.V. All rights reserved.
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