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Sensors 2010, 10(7), 7002-7017; doi:10.3390/s100707002
Article
The Effects of the Location of Au Additives on Combustion-generated SnO2 Nanopowders for CO Gas Sensing
1
Department of Mechanical Engineering, Rowan University / 201 Mullica Hill Road, Glassboro, NJ 08028, USA
2
Department of Mechanical Engineering, University of Michigan / 2350 Hayward Street, Ann Arbor, MI 48109, USA
* Author to whom correspondence should be addressed.
Received: 9 June 2010; in revised form: 16 July 2010 / Accepted: 19 July 2010 / Published: 21 July 2010
(This article belongs to the Special Issue Gas Sensors - 2010)
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Abstract: The current work presents the results of an experimental study of the effects of the location of gold additives on the performance of combustion-generated tin dioxide (SnO2) nanopowders in solid state gas sensors. The time response and sensor response
to 500 ppm carbon monoxide is reported for a range of gold additive/SnO2 film architectures including the use of colloidal, sputtered, and combustion-generated Au additives. The opportunities afforded by combustion synthesis to affect the SnO2/additive morphology are demonstrated. The best sensor performance in terms of sensor response (S) and time response (t) was observed when the Au additives were restricted to the outermost layer of the gas-sensing film. Further improvement was observed in the sensor response and time response when the Au additives were dispersed throughout the outermost layer of the film, where S = 11.3 and t = 51 s, as opposed to Au localized at the surface, where
S = 6.1 and t = 60 s.
to 500 ppm carbon monoxide is reported for a range of gold additive/SnO2 film architectures including the use of colloidal, sputtered, and combustion-generated Au additives. The opportunities afforded by combustion synthesis to affect the SnO2/additive morphology are demonstrated. The best sensor performance in terms of sensor response (S) and time response (t) was observed when the Au additives were restricted to the outermost layer of the gas-sensing film. Further improvement was observed in the sensor response and time response when the Au additives were dispersed throughout the outermost layer of the film, where S = 11.3 and t = 51 s, as opposed to Au localized at the surface, where
S = 6.1 and t = 60 s.
Keywords: SnO2; gas sensor; additives; gold; combustion synthesis
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MDPI and ACS Style
Bakrania, S.D.; Wooldridge, M.S. The Effects of the Location of Au Additives on Combustion-generated SnO2 Nanopowders for CO Gas Sensing. Sensors 2010, 10, 7002-7017.
AMA StyleBakrania SD, Wooldridge MS. The Effects of the Location of Au Additives on Combustion-generated SnO2 Nanopowders for CO Gas Sensing. Sensors. 2010; 10(7):7002-7017.
Chicago/Turabian StyleBakrania, Smitesh D.; Wooldridge, Margaret S. 2010. "The Effects of the Location of Au Additives on Combustion-generated SnO2 Nanopowders for CO Gas Sensing." Sensors 10, no. 7: 7002-7017.