The effects of the location of au additives on combustion-generated SnO2 nanopowders for co gas sensing

Smitesh D. Bakrania; Margaret S. Wooldridge

doi:10.3390/s100707002

The effects of the location of au additives on combustion-generated SnO₂ nanopowders for co gas sensing

Smitesh D. Bakrania, Margaret S. Wooldridge

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

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 (τ) 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 τ = 51 s, as opposed to Au localized at the surface, where S = 6.1 and τ = 60 s.

Original language	English (US)
Pages (from-to)	7002-7017
Number of pages	16
Journal	Sensors
Volume	10
Issue number	7
DOIs	https://doi.org/10.3390/s100707002
State	Published - Jul 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Information Systems
Atomic and Molecular Physics, and Optics
Biochemistry
Instrumentation
Electrical and Electronic Engineering

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10.3390/s100707002

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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 (τ) 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 τ = 51 s, as opposed to Au localized at the surface, where S = 6.1 and τ = 60 s.",

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The effects of the location of au additives on combustion-generated SnO₂ nanopowders for co gas sensing

Abstract

All Science Journal Classification (ASJC) codes

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