Gas sensing properties of SnO₂ nanowires on micro-heater

Gas sensing properties of SnO₂ nanowires on micro-heater

The SnO₂ nanowires (NWs) network gas sensors were fabricated on a micro-electrode and heater suspended in a cavity. The sensors showed selective detection to C₂H₅OH at a heater power during sensor operation as low as 30–40mW. The gas response and response speed of the SnO₂ NWs sensor to 100ppm C₂H₅O...

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Veröffentlicht in:Sensors and actuators. B, Chemical Chemical, 2011-06, Vol.154 (2), p.295-300
Hauptverfasser: Hwang, In-Sung, Lee, Eui-Bok, Kim, Sun-Jung, Choi, Joong-Ki, Cha, Jung-Ho, Lee, Ho-Jun, Ju, Byeong-Kwon, Lee, Jong-Heun
Format: Artikel
Sprache:eng
Schlagworte:
Electrodes
Gas sensors
Heaters
Heating equipment
nanoparticles
Nanowires
Sensors
Tin dioxide
Tin oxides
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Zusammenfassung:The SnO₂ nanowires (NWs) network gas sensors were fabricated on a micro-electrode and heater suspended in a cavity. The sensors showed selective detection to C₂H₅OH at a heater power during sensor operation as low as 30–40mW. The gas response and response speed of the SnO₂ NWs sensor to 100ppm C₂H₅OH were 4.6- and 4.7-fold greater, respectively, than those of the SnO₂ nanoparticles (NPs) sensor with the same electrode geometry. The reasons for these enhanced gas sensing characteristics are discussed in relation to the sensing materials and sensor structures.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2009.11.012