Inverse modeling of CO reactions at SnO2 nanowire surfaces for selective detection

G. Tulzer; S. Baumgartner; E. Brunet; G. C. Mutinati; S. Steinhauer; A. Köck; C. Heitzinger A

doi:10.1016/j.proeng.2012.09.270

Inverse modeling of CO reactions at SnO2 nanowire surfaces for selective detection

G. Tulzer, S. Baumgartner, E. Brunet, G. C. Mutinati, S. Steinhauer, A. Köck, C. Heitzinger A

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

Abstract

Nanowire gas sensors show high sensitivity towards various gases and offer great potential to improve present gas sensing. In this work, we investigate experimental results achieved with an undoped single SnO2 nanowire sensor device for CO pulses in N2 atmosphere at different operating temperatures. We calculated the reaction parameters according to the mass action law including frequency factors, activation energies, and numbers of intrinsic as well as extrinsic surface sites. With the values obtained, we then calculated the surface charge of the nanowire sensor by solving the corresponding differential equations. The simulated results agree very well with the experimental values at an operating temperature of 200°C and hence provide good understanding of the chemical reaction. This can be used to simulate the current through the transducer and consequently the sensitivity of the device, and the parameters provided here are useful for computational procedures to provide selectivity.

Original language	English (US)
Title of host publication	Procedia Engineering
Publisher	Elsevier BV
Pages	809-812
Number of pages	4
DOIs	https://doi.org/10.1016/j.proeng.2012.09.270
State	Published - Nov 2 2012
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-24
Acknowledged KAUST grant number(s): KUK-I1-007-43
Acknowledgements: The authors acknowledge support by the WWTF (Viennese Science and Technology Fund) high-potential project No. MA09-028 and the FWF (Austrian Science Fund) project No P20871-N13. The publication is based on work supported by Award No. KUK-I1-007-43, funded by the King Abdullah University of Science and Technology (KAUST).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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10.1016/j.proeng.2012.09.270

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title = "Inverse modeling of CO reactions at SnO2 nanowire surfaces for selective detection",

abstract = "Nanowire gas sensors show high sensitivity towards various gases and offer great potential to improve present gas sensing. In this work, we investigate experimental results achieved with an undoped single SnO2 nanowire sensor device for CO pulses in N2 atmosphere at different operating temperatures. We calculated the reaction parameters according to the mass action law including frequency factors, activation energies, and numbers of intrinsic as well as extrinsic surface sites. With the values obtained, we then calculated the surface charge of the nanowire sensor by solving the corresponding differential equations. The simulated results agree very well with the experimental values at an operating temperature of 200°C and hence provide good understanding of the chemical reaction. This can be used to simulate the current through the transducer and consequently the sensitivity of the device, and the parameters provided here are useful for computational procedures to provide selectivity.",

author = "G. Tulzer and S. Baumgartner and E. Brunet and Mutinati, {G. C.} and S. Steinhauer and A. K{\"o}ck and A, {C. Heitzinger}",

note = "KAUST Repository Item: Exported on 2022-06-24 Acknowledged KAUST grant number(s): KUK-I1-007-43 Acknowledgements: The authors acknowledge support by the WWTF (Viennese Science and Technology Fund) high-potential project No. MA09-028 and the FWF (Austrian Science Fund) project No P20871-N13. The publication is based on work supported by Award No. KUK-I1-007-43, funded by the King Abdullah University of Science and Technology (KAUST). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2012",

month = nov,

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doi = "10.1016/j.proeng.2012.09.270",

language = "English (US)",

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AU - Tulzer, G.

AU - Baumgartner, S.

AU - Brunet, E.

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AU - Steinhauer, S.

AU - Köck, A.

AU - A, C. Heitzinger

N1 - KAUST Repository Item: Exported on 2022-06-24 Acknowledged KAUST grant number(s): KUK-I1-007-43 Acknowledgements: The authors acknowledge support by the WWTF (Viennese Science and Technology Fund) high-potential project No. MA09-028 and the FWF (Austrian Science Fund) project No P20871-N13. The publication is based on work supported by Award No. KUK-I1-007-43, funded by the King Abdullah University of Science and Technology (KAUST). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2012/11/2

Y1 - 2012/11/2

N2 - Nanowire gas sensors show high sensitivity towards various gases and offer great potential to improve present gas sensing. In this work, we investigate experimental results achieved with an undoped single SnO2 nanowire sensor device for CO pulses in N2 atmosphere at different operating temperatures. We calculated the reaction parameters according to the mass action law including frequency factors, activation energies, and numbers of intrinsic as well as extrinsic surface sites. With the values obtained, we then calculated the surface charge of the nanowire sensor by solving the corresponding differential equations. The simulated results agree very well with the experimental values at an operating temperature of 200°C and hence provide good understanding of the chemical reaction. This can be used to simulate the current through the transducer and consequently the sensitivity of the device, and the parameters provided here are useful for computational procedures to provide selectivity.

AB - Nanowire gas sensors show high sensitivity towards various gases and offer great potential to improve present gas sensing. In this work, we investigate experimental results achieved with an undoped single SnO2 nanowire sensor device for CO pulses in N2 atmosphere at different operating temperatures. We calculated the reaction parameters according to the mass action law including frequency factors, activation energies, and numbers of intrinsic as well as extrinsic surface sites. With the values obtained, we then calculated the surface charge of the nanowire sensor by solving the corresponding differential equations. The simulated results agree very well with the experimental values at an operating temperature of 200°C and hence provide good understanding of the chemical reaction. This can be used to simulate the current through the transducer and consequently the sensitivity of the device, and the parameters provided here are useful for computational procedures to provide selectivity.

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U2 - 10.1016/j.proeng.2012.09.270

DO - 10.1016/j.proeng.2012.09.270

M3 - Conference contribution

SP - 809

EP - 812

BT - Procedia Engineering

PB - Elsevier BV

ER -

Inverse modeling of CO reactions at SnO2 nanowire surfaces for selective detection

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