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A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires
Here, we demonstrate a facile approach for the preparation of ZnO nanowires (NWs) with tunable surface wettability that can be manipulated reversibly in a controlled manner from a superhydrophilic state to a superhydrophobic state. The as-synthesized ZnO NWs obtained by a chemical vapor deposition m...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5054356/ https://www.ncbi.nlm.nih.gov/pubmed/27713536 http://dx.doi.org/10.1038/srep35073 |
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author | Yadav, Kavita Mehta, B. R. Bhattacharya, Saswata Singh, J. P. |
author_facet | Yadav, Kavita Mehta, B. R. Bhattacharya, Saswata Singh, J. P. |
author_sort | Yadav, Kavita |
collection | PubMed |
description | Here, we demonstrate a facile approach for the preparation of ZnO nanowires (NWs) with tunable surface wettability that can be manipulated reversibly in a controlled manner from a superhydrophilic state to a superhydrophobic state. The as-synthesized ZnO NWs obtained by a chemical vapor deposition method are superhydrophilic with a contact angle (CA) value of ~0°. After H(2) gas annealing at 300 °C for 90 minutes, ZnO NWs display superhydrophobic behavior with a roll-off angle less than 5°. However, O(2) gas annealing converts these superhydrophobic ZnO NWs into a superhydrophilic state. For switching from superhydrophobic to superhydrophilic state and vice versa in cyclic manner, H(2) and O(2) gas annealing treatment was used, respectively. A model based on density functional theory indicates that the oxygen-related defects are responsible for CA switching. The water resistant properties of the ZnO NWs coating is found to be durable and can be applied to a variety of substrates including glass, metals, semiconductors, paper and even flexible polymers. |
format | Online Article Text |
id | pubmed-5054356 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50543562016-10-19 A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires Yadav, Kavita Mehta, B. R. Bhattacharya, Saswata Singh, J. P. Sci Rep Article Here, we demonstrate a facile approach for the preparation of ZnO nanowires (NWs) with tunable surface wettability that can be manipulated reversibly in a controlled manner from a superhydrophilic state to a superhydrophobic state. The as-synthesized ZnO NWs obtained by a chemical vapor deposition method are superhydrophilic with a contact angle (CA) value of ~0°. After H(2) gas annealing at 300 °C for 90 minutes, ZnO NWs display superhydrophobic behavior with a roll-off angle less than 5°. However, O(2) gas annealing converts these superhydrophobic ZnO NWs into a superhydrophilic state. For switching from superhydrophobic to superhydrophilic state and vice versa in cyclic manner, H(2) and O(2) gas annealing treatment was used, respectively. A model based on density functional theory indicates that the oxygen-related defects are responsible for CA switching. The water resistant properties of the ZnO NWs coating is found to be durable and can be applied to a variety of substrates including glass, metals, semiconductors, paper and even flexible polymers. Nature Publishing Group 2016-10-07 /pmc/articles/PMC5054356/ /pubmed/27713536 http://dx.doi.org/10.1038/srep35073 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Yadav, Kavita Mehta, B. R. Bhattacharya, Saswata Singh, J. P. A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires |
title | A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires |
title_full | A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires |
title_fullStr | A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires |
title_full_unstemmed | A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires |
title_short | A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires |
title_sort | fast and effective approach for reversible wetting-dewetting transitions on zno nanowires |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5054356/ https://www.ncbi.nlm.nih.gov/pubmed/27713536 http://dx.doi.org/10.1038/srep35073 |
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