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Improved Sensitivity of α-Fe(2)O(3) Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO
A strategy for improving the sensitivity of a sensor for detecting CO and NH(3) gases is presented herein. The gas sensor was fabricated from ZnO metal oxide semiconductor nanostructures grown via a vapor–liquid–solid process and decorated with α-Fe(2)O(3) nanoparticles via a sol–gel process. The re...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6515385/ https://www.ncbi.nlm.nih.gov/pubmed/31013624 http://dx.doi.org/10.3390/s19081903 |
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author | Lee, Jeongseok Lee, Se-Hyeong Bak, So-Young Kim, Yoojong Woo, Kyoungwan Lee, Sanghyun Lim, Yooseong Yi, Moonsuk |
author_facet | Lee, Jeongseok Lee, Se-Hyeong Bak, So-Young Kim, Yoojong Woo, Kyoungwan Lee, Sanghyun Lim, Yooseong Yi, Moonsuk |
author_sort | Lee, Jeongseok |
collection | PubMed |
description | A strategy for improving the sensitivity of a sensor for detecting CO and NH(3) gases is presented herein. The gas sensor was fabricated from ZnO metal oxide semiconductor nanostructures grown via a vapor–liquid–solid process and decorated with α-Fe(2)O(3) nanoparticles via a sol–gel process. The response was enhanced by the formation of an α-Fe(2)O(3)/ZnO n–n heterojunction and the growth of thinner wires. ZnO nanowires were grown on indium–tin–oxide glass electrodes using Sn as a catalyst for growth instead of Au. The structure and elemental composition were investigated using field-emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The gas sensing results indicate that the response value to 100 ppm CO was 18.8 at the optimum operating temperature of 300 °C. |
format | Online Article Text |
id | pubmed-6515385 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-65153852019-05-30 Improved Sensitivity of α-Fe(2)O(3) Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO Lee, Jeongseok Lee, Se-Hyeong Bak, So-Young Kim, Yoojong Woo, Kyoungwan Lee, Sanghyun Lim, Yooseong Yi, Moonsuk Sensors (Basel) Article A strategy for improving the sensitivity of a sensor for detecting CO and NH(3) gases is presented herein. The gas sensor was fabricated from ZnO metal oxide semiconductor nanostructures grown via a vapor–liquid–solid process and decorated with α-Fe(2)O(3) nanoparticles via a sol–gel process. The response was enhanced by the formation of an α-Fe(2)O(3)/ZnO n–n heterojunction and the growth of thinner wires. ZnO nanowires were grown on indium–tin–oxide glass electrodes using Sn as a catalyst for growth instead of Au. The structure and elemental composition were investigated using field-emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The gas sensing results indicate that the response value to 100 ppm CO was 18.8 at the optimum operating temperature of 300 °C. MDPI 2019-04-22 /pmc/articles/PMC6515385/ /pubmed/31013624 http://dx.doi.org/10.3390/s19081903 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lee, Jeongseok Lee, Se-Hyeong Bak, So-Young Kim, Yoojong Woo, Kyoungwan Lee, Sanghyun Lim, Yooseong Yi, Moonsuk Improved Sensitivity of α-Fe(2)O(3) Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO |
title | Improved Sensitivity of α-Fe(2)O(3) Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO |
title_full | Improved Sensitivity of α-Fe(2)O(3) Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO |
title_fullStr | Improved Sensitivity of α-Fe(2)O(3) Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO |
title_full_unstemmed | Improved Sensitivity of α-Fe(2)O(3) Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO |
title_short | Improved Sensitivity of α-Fe(2)O(3) Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO |
title_sort | improved sensitivity of α-fe(2)o(3) nanoparticle-decorated zno nanowire gas sensor for co |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6515385/ https://www.ncbi.nlm.nih.gov/pubmed/31013624 http://dx.doi.org/10.3390/s19081903 |
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