Physisorption-induced electron scattering on the surface of carbon-metal core-shell nanowire arrays for hydrogen sensing

Yick, S., Yajadda, M.M.A., Bendavid, A., Han, Z.J., & Ostrikov, K. (2013) Physisorption-induced electron scattering on the surface of carbon-metal core-shell nanowire arrays for hydrogen sensing. Applied Physics Letters, 102(23), p. 233111.

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Abstract

Palladium is sputtered on multi-walled carbon nanotube forests to form carbon-metal core-shell nanowire arrays. These hybrid nanostructures exhibited resistive responses when exposed to hydrogen with an excellent baseline recovery at room temperature. The magnitude of the response is shown to be tuneable by an applied voltage. Unlike the charge-transfer mechanism commonly attributed to Pd nanoparticle-decorated carbon nanotubes, this demonstrates that the hydrogen response mechanism of the multi-walled carbon nanotube-Pd core-shell nanostructure is due to the increase in electron scattering induced by physisorption of hydrogen. These hybrid core-shell nanostructures are promising for gas detection in hydrogen storage applications.

Impact and interest:

3 citations in Scopus
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2 citations in Web of Science®

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ID Code: 73517
Item Type: Journal Article
Refereed: Yes
Additional Information: Funding Details: ARC, Australian Research Council
Additional URLs:
DOI: 10.1063/1.4811165
ISSN: 0003-6951
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 08 Jul 2014 05:40
Last Modified: 09 Jul 2014 01:18

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