Enhancing ZnO nanowire gas sensors using Au/Fe2O3 hybrid nanoparticle decoration
Abstract
Heterojunctions are an important strategy for designing high performance electrical sensor materials and related devices. Herein, a new type of metal-semiconductor hybrid nanoparticle has been successfully used to remarkably sensitize the surface of ZnO nanowires for detecting NO2 with high responses over a broad temperature window ranging from room temperature to 600 °C. These hybrid nanoparticles are comprised of iron oxide nanowires with well dispersed single crystalline Au nanoparticles. The hybrid nanoparticle decorated ZnO nanowires have achieved a giant response, as high as 74 500 toward NO2 gas, about 42 times that of Au decorated ZnO nanowire sensors. This dramatic enhancement may be attributed to the efficient charge transfer across the Au–Fe2O3 Schottky and Fe2O3–ZnO semiconductor heterojunction interfaces. Due to the incorporation of thermally-stable Fe2O3 nanoparticles as the support of Au nanoparticles, the working temperature of nanowire sensors was successfully extended to higher temperatures, with an increase of 200 °C, from 400 °C to 600 °C. Such a combination of semiconductor heterojunction and semiconductor-metal Schottky contact presents a new strategy for designing high performance electrical sensors with high sensitivity, stability, selectivity, and wide operation temperature window, which are potentially suitable for advanced energy systems such as automotive engines and powermore »
- Authors:
-
[1]
- Univ. of Connecticut, Storrs, CT (United States). Dept. of Materials Science and Engineering. Inst. of Materials Science
- Univ. of Texas at Dallas, Richardson, TX (United States). Dept. of Chemistry
- Publication Date:
- Research Org.:
- Univ. of Connecticut, Storrs, CT (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1799728
- Alternate Identifier(s):
- OSTI ID: 1631069
- Grant/Contract Number:
- FE0000870; FE0011577; FE0000870 and DE-FE0011577
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nanotechnology
- Additional Journal Information:
- Journal Volume: 31; Journal Issue: 32; Journal ID: ISSN 0957-4484
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY
Citation Formats
Zhang, Bo, Huang, Yingyu, Vinluan, Rodrigo, Wang, Sibo, Cui, Can, Lu, Xingxu, Peng, Chuanqi, Zhang, Mingwan, Zheng, Jie, and Gao, Pu-Xian. Enhancing ZnO nanowire gas sensors using Au/Fe2O3 hybrid nanoparticle decoration. United States: N. p., 2020.
Web. doi:10.1088/1361-6528/ab89cf.
Zhang, Bo, Huang, Yingyu, Vinluan, Rodrigo, Wang, Sibo, Cui, Can, Lu, Xingxu, Peng, Chuanqi, Zhang, Mingwan, Zheng, Jie, & Gao, Pu-Xian. Enhancing ZnO nanowire gas sensors using Au/Fe2O3 hybrid nanoparticle decoration. United States. https://doi.org/10.1088/1361-6528/ab89cf
Zhang, Bo, Huang, Yingyu, Vinluan, Rodrigo, Wang, Sibo, Cui, Can, Lu, Xingxu, Peng, Chuanqi, Zhang, Mingwan, Zheng, Jie, and Gao, Pu-Xian. Thu .
"Enhancing ZnO nanowire gas sensors using Au/Fe2O3 hybrid nanoparticle decoration". United States. https://doi.org/10.1088/1361-6528/ab89cf. https://www.osti.gov/servlets/purl/1799728.
@article{osti_1799728,
title = {Enhancing ZnO nanowire gas sensors using Au/Fe2O3 hybrid nanoparticle decoration},
author = {Zhang, Bo and Huang, Yingyu and Vinluan, Rodrigo and Wang, Sibo and Cui, Can and Lu, Xingxu and Peng, Chuanqi and Zhang, Mingwan and Zheng, Jie and Gao, Pu-Xian},
abstractNote = {Heterojunctions are an important strategy for designing high performance electrical sensor materials and related devices. Herein, a new type of metal-semiconductor hybrid nanoparticle has been successfully used to remarkably sensitize the surface of ZnO nanowires for detecting NO2 with high responses over a broad temperature window ranging from room temperature to 600 °C. These hybrid nanoparticles are comprised of iron oxide nanowires with well dispersed single crystalline Au nanoparticles. The hybrid nanoparticle decorated ZnO nanowires have achieved a giant response, as high as 74 500 toward NO2 gas, about 42 times that of Au decorated ZnO nanowire sensors. This dramatic enhancement may be attributed to the efficient charge transfer across the Au–Fe2O3 Schottky and Fe2O3–ZnO semiconductor heterojunction interfaces. Due to the incorporation of thermally-stable Fe2O3 nanoparticles as the support of Au nanoparticles, the working temperature of nanowire sensors was successfully extended to higher temperatures, with an increase of 200 °C, from 400 °C to 600 °C. Such a combination of semiconductor heterojunction and semiconductor-metal Schottky contact presents a new strategy for designing high performance electrical sensors with high sensitivity, stability, selectivity, and wide operation temperature window, which are potentially suitable for advanced energy systems such as automotive engines and power plants.},
doi = {10.1088/1361-6528/ab89cf},
journal = {Nanotechnology},
number = 32,
volume = 31,
place = {United States},
year = {Thu May 28 00:00:00 EDT 2020},
month = {Thu May 28 00:00:00 EDT 2020}
}
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