Low temperature gas sensing properties of Graphene Oxide/SnO2 nanowires composite for H-2

Year: 2016

Authors: Munasinghe M. A. H. M., Comini E., Zappa D., Poli N., Sberveglieri G.

Autors Affiliation: ‎Univ Brescia, Sensor Lab, Via Valotti 9, I-25133 Brescia, Italy;‎ CNR INO, Via Valotti 9, I-25133 Brescia, Italy

Abstract: In this work Graphene Oxide (GO) and SnO2 nanowires (NWs) composite sensing performance were studied. Single crystal SnO2 NWs were directly grown by thermal evaporation method and GO was successfully synthesized using modified Hummers method. RF magnetron sputtered Pt particles were used as a catalyst for the growth of SnO2 NWs. Drop cast technique was used to deposited GO on top of the SnO2 NWs. FE-SEM (LEO 1525) was used to investigate the morphology of SnO2 NWs and GO. Fabricated sensors were tested towards various concentration of H-2 at different working temperatures. This GO/SnO2 hybrid sensors show a reversible response to H-2 at low operating temperature. (C) 2016 The Authors. Published by Elsevier Ltd.

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KeyWords: Graphene oxide; Tin oxide; thermal evaporation; chemical sensing