Study on sensing properties of tin oxide CO gas sensor with low power consumption

A study of CO sensors with oscillatory response

“…The materials were then painted carefully onto the prepared substrates of ceramic tubes (Taguchi structure), co-axial Pt coils, similar to Han et al [10] and substrates with deposited interdigital electrodes and then sintered in air for 1 h at 700 • C. These structures are presented in Fig. 1.…”

“…thick film sensor was exposed to CO gas [4,5]. Since then, there has been some investigation into this type of CO sensing mechanism and its applications [6][7][8][9][10]. Different results and explanations have been given [11][12][13], however, this phenomenon is still not yet fully understood.…”

Fabrication and characterization of indium-doped p-type SnO2 thin films

“…Unfortunately, until now, although SnO 2 has been used widely as transparent conducting electrodes, thin-film heaters, and gas sensors, etc. [4][5][6][7][8][9], no or little efforts were reported to fabricate p-type conducting SnO 2 . In this paper, a method to prepare p-type conducting SnO 2 by doping of indium was reported.…”

Improved Sensitivity of an NO Gas Sensor by Chemical Activation of Electrospun Carbon Fibers

“…In case of HACF-80, the response time was faster than with the other samples. The main reason for this result is likely that the NO gases were quickly adsorbed into the narrow micropores, resulting in the quick response time in HACF-80, due to its relatively high fraction of micropore volume [20][21][22]. In detail, the target gas adsorbed into the micropores very quickly in approximately 5 min, resulting in a significant drop in resistance, and then slowly adsorbed into the mesopores from 5 min to 10 min, resulting in a slow decrease in resistance.…”