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Low-temperature growth of SnO2 nanorod arrays and tunable n-p-n sensing response of ZnO/SnO2 heterojunction for exclusive hydrogen sensors

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Low-temperature growth of SnO2 nanorod arrays and tunable n-p-n sensing response of ZnO/SnO2 heterojunction for exclusive hydrogen sensors

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dc.contributor.author Huang, Hui
dc.contributor.author Gong, Hua
dc.contributor.author Chow, Chee Lap
dc.contributor.author Guo, Jun
dc.contributor.author White, Timothy John
dc.contributor.author Tse, Man Siu
dc.contributor.author Tan, Ooi Kiang
dc.date.accessioned 2011-10-12T03:09:46Z
dc.date.available 2011-10-12T03:09:46Z
dc.date.copyright 2011
dc.date.issued 2011-10-12
dc.identifier.citation Huang, H., Gong, H., Chow, C. L., Guo, J., White, T. J., Tse, M. S., et al. (2011). Low-Temperature Growth of SnO2 Nanorod Arrays and Tunable n-p-n Sensing Response of ZnO/SnO2 Heterojunction for Exclusive Hydrogen Sensors. Advanced Functional Materials, 21, 2680-2686.
dc.identifier.issn 1616-301X
dc.identifier.uri http://hdl.handle.net/10220/7234
dc.description.abstract Uniform SnO 2 nanorod arrays have been deposited at low temperature by plasma-enhanced chemical vapor deposition (PECVD). ZnO surface modifi cation is used to improve the selectivity of the SnO 2 nanorod sensor to H 2 gas. The ZnO-modifi ed SnO 2 nanorod sensor shows a normal n-type response to 100 ppm CO, NH 3 , and CH 4 reducing gas whereas it exhibits concentrationdependent n–p–n transitions for its sensing response to H 2 gas. This abnormal sensing behavior can be explained by the formation of n-ZnO/p-Zn-O-Sn/n-SnO 2 heterojunction structures. The gas sensors can be used in highly selective H 2 sensing and this study also opens up a general approach for tailoring the selectivity of gas sensors by surface modification.
dc.format.extent 7 p.
dc.language.iso en
dc.relation.ispartofseries Advanced functional materials
dc.rights © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
dc.subject DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics.
dc.title Low-temperature growth of SnO2 nanorod arrays and tunable n-p-n sensing response of ZnO/SnO2 heterojunction for exclusive hydrogen sensors
dc.type Journal Article
dc.contributor.school School of Electrical and Electronic Engineering
dc.identifier.doi http://dx.doi.org/10.1002/adfm.201002115
dc.identifier.rims 160001

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