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Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing
In this study, hydrogen (H(2)) and methane (CH(4)) were used as reactive gases, and chemical vapor deposition (CVD) was used to grow single-layer graphene on a copper foil substrate. The single-layer graphene obtained was transferred to a single-crystal silicon substrate by PMMA transfer technology...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623918/ https://www.ncbi.nlm.nih.gov/pubmed/34832345 http://dx.doi.org/10.3390/ma14226943 |
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author | Lu, Yang-Ming Tseng, Chi-Feng Lan, Bing-Yi Hsieh, Chia-Fen |
author_facet | Lu, Yang-Ming Tseng, Chi-Feng Lan, Bing-Yi Hsieh, Chia-Fen |
author_sort | Lu, Yang-Ming |
collection | PubMed |
description | In this study, hydrogen (H(2)) and methane (CH(4)) were used as reactive gases, and chemical vapor deposition (CVD) was used to grow single-layer graphene on a copper foil substrate. The single-layer graphene obtained was transferred to a single-crystal silicon substrate by PMMA transfer technology for the subsequent growth of nano zinc oxide. The characteristics of CVD-deposited graphene were analyzed by a Raman spectrometer, an optical microscope, a four-point probe, and an ultraviolet/visible spectrometer. The sol–gel method was applied to prepare the zinc oxide seed layer film with the spin-coating method, with methanol, zinc acetate, and sodium hydroxide as the precursors for growing ZnO nanostructures. On top of the ZnO seed layer, a one-dimensional zinc oxide nanostructure was grown by a hydrothermal method at 95 °C, using a zinc nitrate and hexamethylenetetramine mixture solution. The characteristics of the nano zinc oxide were analyzed by scanning electron microscope(SEM),x-ray diffractometer(XRD), and Raman spectrometer. The obtained graphene/zinc oxide nano-heterostructure sensor has a sensitivity of 1.06 at a sensing temperature of 205 °C and a concentration of hydrogen as low as 5 ppm, with excellent sensing repeatability. The main reason for this is that the zinc oxide nanostructure has a large specific surface area, and many oxygen vacancy defects exist on its surface. In addition, the P–N heterojunction formed between the n-type zinc oxide and the p-type graphene also contributes to hydrogen sensing. |
format | Online Article Text |
id | pubmed-8623918 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-86239182021-11-27 Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing Lu, Yang-Ming Tseng, Chi-Feng Lan, Bing-Yi Hsieh, Chia-Fen Materials (Basel) Article In this study, hydrogen (H(2)) and methane (CH(4)) were used as reactive gases, and chemical vapor deposition (CVD) was used to grow single-layer graphene on a copper foil substrate. The single-layer graphene obtained was transferred to a single-crystal silicon substrate by PMMA transfer technology for the subsequent growth of nano zinc oxide. The characteristics of CVD-deposited graphene were analyzed by a Raman spectrometer, an optical microscope, a four-point probe, and an ultraviolet/visible spectrometer. The sol–gel method was applied to prepare the zinc oxide seed layer film with the spin-coating method, with methanol, zinc acetate, and sodium hydroxide as the precursors for growing ZnO nanostructures. On top of the ZnO seed layer, a one-dimensional zinc oxide nanostructure was grown by a hydrothermal method at 95 °C, using a zinc nitrate and hexamethylenetetramine mixture solution. The characteristics of the nano zinc oxide were analyzed by scanning electron microscope(SEM),x-ray diffractometer(XRD), and Raman spectrometer. The obtained graphene/zinc oxide nano-heterostructure sensor has a sensitivity of 1.06 at a sensing temperature of 205 °C and a concentration of hydrogen as low as 5 ppm, with excellent sensing repeatability. The main reason for this is that the zinc oxide nanostructure has a large specific surface area, and many oxygen vacancy defects exist on its surface. In addition, the P–N heterojunction formed between the n-type zinc oxide and the p-type graphene also contributes to hydrogen sensing. MDPI 2021-11-17 /pmc/articles/PMC8623918/ /pubmed/34832345 http://dx.doi.org/10.3390/ma14226943 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lu, Yang-Ming Tseng, Chi-Feng Lan, Bing-Yi Hsieh, Chia-Fen Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing |
title | Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing |
title_full | Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing |
title_fullStr | Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing |
title_full_unstemmed | Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing |
title_short | Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing |
title_sort | fabrication of graphene/zinc oxide nano-heterostructure for hydrogen sensing |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623918/ https://www.ncbi.nlm.nih.gov/pubmed/34832345 http://dx.doi.org/10.3390/ma14226943 |
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