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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...

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Autores principales: Sisman, Orhan, Zappa, Dario, Maraloiu, Valentin-Adrian, Comini, Elisabetta
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
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.
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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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