Platinum/graphene nanosheet/SiC contacts and their application for hydrogen gas sensing

Shafiei, M, Spizzirri, P, Arsat, R, Yu, J, Du Plessis, J, Dubin, S, Kaner, R, Kalantar Zadeh, K and Wlodarski, W 2010, 'Platinum/graphene nanosheet/SiC contacts and their application for hydrogen gas sensing', Journal of Physical Chemistry C, vol. 114, no. 32, pp. 13796-13801.


Document type: Journal Article
Collection: Journal Articles

Title Platinum/graphene nanosheet/SiC contacts and their application for hydrogen gas sensing
Author(s) Shafiei, M
Spizzirri, P
Arsat, R
Yu, J
Du Plessis, J
Dubin, S
Kaner, R
Kalantar Zadeh, K
Wlodarski, W
Year 2010
Journal name Journal of Physical Chemistry C
Volume number 114
Issue number 32
Start page 13796
End page 13801
Total pages 6
Publisher American Chemical Society
Abstract Pt/graphene nanosheet/SiC based devices are fabricated and characterized and their performances toward hydrogen gas are investigated. The graphene nanosheets are synthesized via the reduction of spray-coated graphite oxide deposited onto SiC substrates. Raman and X-ray photoelectron spectroscopies indicate incomplete reduction of the graphite oxide, resulting in partially oxidized graphene nanosheet layers of less than 10 nm thickness. The effects of interfaces on the nonlinear behavior of the Pt/graphene and graphene/SiC junctions are investigated. Current-voltage measurements of the sensors toward 1% hydrogen in synthetic air gas mixture at various temperatures ranging up to 100. º C are performed. From the dynamic response, a voltage shift of ~100 mV is recorded for 1% hydrogen at a constant current bias of 1 mA at 100. ºC.
Keyword(s) Constant current
Current-voltage measurements
Graphite oxide
Hydrogen gas
Hydrogen gas sensing
Nonlinear behavior
SiC substrates
Synthetic air
Voltage shift
DOI - identifier 10.1021/jp104459s
Copyright notice © 2010 American Chemical Society
ISSN 1932-7447
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