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Sensing performance of gas sensors fabricated from controllably grown ZnO-based nanorods on seed layers

Sensing performance of gas sensors fabricated from controllably grown ZnO-based nanorods on seed layers
Sensing performance of gas sensors fabricated from controllably grown ZnO-based nanorods on seed layers
ZnO nanorods (NRs) grown on different ZnO seed layers deposited at various Ar-O2 ambient conditions and the morphologies of the seed layers that affect their response to nitric oxide (NO) gas were investigated. The sensing performance of the devices fabricated with the seed layers deposited under an O2-rich condition tends to deteriorate. We believe that the surface roughness, grain size, and defect concentration of the seed layer are responsible for this phenomenon. Despite the response to the gas was found to be less dependent on NR length, the gas sensing response is significantly dependent on the oxygen vacancy concentration and the exposure of the NR structure to the NO gas ambient surface. Excellent gas response (57.5% at 1 ppm and 7.1% at 100 ppb of NO gas) was achieved at room temperature - superior to the response presented by other proposed methods. This study not only proposes the potential of ZnO-NRs for high-performance NO gas sensor devices but also offers a simple and low-cost method to optimize the response without using any catalyst and additional treatment.
NO gas sensing, ZnO, gas sensor device, hydrothermal growth, nanorod
0022-2461
8850–8860
Singh, Pragya
8fb95fa7-5174-48d9-b5ed-29c5f2574c5c
Simanjuntak, Firman Mangasa
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Wu, Chung Yi
a1abb5e9-79d6-4592-bda7-bf8381f8132e
Kumar, Amit
bac0df72-a532-4f39-8388-44991957df02
Zan, Hsiao-Wen
27029d21-5958-4079-afb0-867d81db1ba7
Tseng, Tseung-Yuen
c284f1b3-a030-4b56-bc22-5bfa2d9650df
Singh, Pragya
8fb95fa7-5174-48d9-b5ed-29c5f2574c5c
Simanjuntak, Firman Mangasa
a5b8dd07-002c-4520-9f67-2dc20d2ff0d5
Wu, Chung Yi
a1abb5e9-79d6-4592-bda7-bf8381f8132e
Kumar, Amit
bac0df72-a532-4f39-8388-44991957df02
Zan, Hsiao-Wen
27029d21-5958-4079-afb0-867d81db1ba7
Tseng, Tseung-Yuen
c284f1b3-a030-4b56-bc22-5bfa2d9650df

Singh, Pragya, Simanjuntak, Firman Mangasa, Wu, Chung Yi, Kumar, Amit, Zan, Hsiao-Wen and Tseng, Tseung-Yuen (2020) Sensing performance of gas sensors fabricated from controllably grown ZnO-based nanorods on seed layers. Journal of Materials Science, 55 (21), 8850–8860. (doi:10.1007/s10853-020-04659-7).

Record type: Article

Abstract

ZnO nanorods (NRs) grown on different ZnO seed layers deposited at various Ar-O2 ambient conditions and the morphologies of the seed layers that affect their response to nitric oxide (NO) gas were investigated. The sensing performance of the devices fabricated with the seed layers deposited under an O2-rich condition tends to deteriorate. We believe that the surface roughness, grain size, and defect concentration of the seed layer are responsible for this phenomenon. Despite the response to the gas was found to be less dependent on NR length, the gas sensing response is significantly dependent on the oxygen vacancy concentration and the exposure of the NR structure to the NO gas ambient surface. Excellent gas response (57.5% at 1 ppm and 7.1% at 100 ppb of NO gas) was achieved at room temperature - superior to the response presented by other proposed methods. This study not only proposes the potential of ZnO-NRs for high-performance NO gas sensor devices but also offers a simple and low-cost method to optimize the response without using any catalyst and additional treatment.

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Sensing performance of gas sensors fabricated from controllably grown ZnO-based nanorods on seed layers - Accepted Manuscript
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Accepted/In Press date: 7 April 2020
e-pub ahead of print date: 27 April 2020
Published date: 1 July 2020
Additional Information: Funding Information: This work was supported by the Ministry of Science and Technology, Taiwan, under projects MOST 105-2221-E-009-143-MY3, MOST-107-2633-E-009-003 and MOST 108-2218-E-009-002. Publisher Copyright: © 2020, Springer Science+Business Media, LLC, part of Springer Nature. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
Keywords: NO gas sensing, ZnO, gas sensor device, hydrothermal growth, nanorod

Identifiers

Local EPrints ID: 441081
URI: http://eprints.soton.ac.uk/id/eprint/441081
ISSN: 0022-2461
PURE UUID: ed102ae8-4f0a-4417-a14a-d7b5340dece0

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Date deposited: 29 May 2020 16:31
Last modified: 26 Nov 2021 05:37

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Contributors

Author: Pragya Singh
Author: Firman Mangasa Simanjuntak
Author: Chung Yi Wu
Author: Amit Kumar
Author: Hsiao-Wen Zan
Author: Tseung-Yuen Tseng

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