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Fabrication of CuO (p)–ZnO (n) Core–Shell Nanowires and Their H(2)-Sensing Properties
Unlike the conventional one-dimensional (1D) core–shell nanowires (NWs) composed of p-type shells and n-type cores, in this work, an inverse design is proposed by depositing n-type ZnO (shell) layers on the surface of p-type CuO (core) NWs, to have a comprehensive understanding of their conductometr...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10342964/ https://www.ncbi.nlm.nih.gov/pubmed/37445116 http://dx.doi.org/10.3390/ma16134802 |
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author | Sisman, Orhan Zappa, Dario Maraloiu, Valentin-Adrian Comini, Elisabetta |
author_facet | Sisman, Orhan Zappa, Dario Maraloiu, Valentin-Adrian Comini, Elisabetta |
author_sort | Sisman, Orhan |
collection | PubMed |
description | Unlike the conventional one-dimensional (1D) core–shell nanowires (NWs) composed of p-type shells and n-type cores, in this work, an inverse design is proposed by depositing n-type ZnO (shell) layers on the surface of p-type CuO (core) NWs, to have a comprehensive understanding of their conductometric gas-sensing kinetics. The surface morphologies of bare and core–shell NWs were investigated by field emission scanning electron microscope (FE-SEM). The ZnO shell layer was presented by overlay images taken by electron dispersive X-ray spectroscopy (EDX) and high-resolution transmission electron microscopy (HRTEM). The pronounced crystalline plane peaks of ZnO were recorded in the compared glancing incident X-ray diffraction (GI-XRD) spectra of CuO and CuO–ZnO core–shell NWs. The ZnO shell layers broaden the absorption curve of CuO NWs in the UV-vis absorption spectra. As a result of the heterostructure formation, the intrinsic p-type sensing behavior of CuO NWs towards 250 and 500 ppm of hydrogen (H(2)) switched to n-type due to the deposition of ZnO shell layers, at 400 °C in dry airflow. |
format | Online Article Text |
id | pubmed-10342964 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-103429642023-07-14 Fabrication of CuO (p)–ZnO (n) Core–Shell Nanowires and Their H(2)-Sensing Properties Sisman, Orhan Zappa, Dario Maraloiu, Valentin-Adrian Comini, Elisabetta Materials (Basel) Article Unlike the conventional one-dimensional (1D) core–shell nanowires (NWs) composed of p-type shells and n-type cores, in this work, an inverse design is proposed by depositing n-type ZnO (shell) layers on the surface of p-type CuO (core) NWs, to have a comprehensive understanding of their conductometric gas-sensing kinetics. The surface morphologies of bare and core–shell NWs were investigated by field emission scanning electron microscope (FE-SEM). The ZnO shell layer was presented by overlay images taken by electron dispersive X-ray spectroscopy (EDX) and high-resolution transmission electron microscopy (HRTEM). The pronounced crystalline plane peaks of ZnO were recorded in the compared glancing incident X-ray diffraction (GI-XRD) spectra of CuO and CuO–ZnO core–shell NWs. The ZnO shell layers broaden the absorption curve of CuO NWs in the UV-vis absorption spectra. As a result of the heterostructure formation, the intrinsic p-type sensing behavior of CuO NWs towards 250 and 500 ppm of hydrogen (H(2)) switched to n-type due to the deposition of ZnO shell layers, at 400 °C in dry airflow. MDPI 2023-07-03 /pmc/articles/PMC10342964/ /pubmed/37445116 http://dx.doi.org/10.3390/ma16134802 Text en © 2023 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 Sisman, Orhan Zappa, Dario Maraloiu, Valentin-Adrian Comini, Elisabetta Fabrication of CuO (p)–ZnO (n) Core–Shell Nanowires and Their H(2)-Sensing Properties |
title | Fabrication of CuO (p)–ZnO (n) Core–Shell Nanowires and Their H(2)-Sensing Properties |
title_full | Fabrication of CuO (p)–ZnO (n) Core–Shell Nanowires and Their H(2)-Sensing Properties |
title_fullStr | Fabrication of CuO (p)–ZnO (n) Core–Shell Nanowires and Their H(2)-Sensing Properties |
title_full_unstemmed | Fabrication of CuO (p)–ZnO (n) Core–Shell Nanowires and Their H(2)-Sensing Properties |
title_short | Fabrication of CuO (p)–ZnO (n) Core–Shell Nanowires and Their H(2)-Sensing Properties |
title_sort | fabrication of cuo (p)–zno (n) core–shell nanowires and their h(2)-sensing properties |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10342964/ https://www.ncbi.nlm.nih.gov/pubmed/37445116 http://dx.doi.org/10.3390/ma16134802 |
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