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Positive impedance humidity sensors via single-component materials
Resistivity-type humidity sensors have been investigated with great interest due to the increasing demands in industry, agriculture and daily life. To date, most of the available humidity sensors have been fabricated based on negative humidity impedance, in which the electrical resistance decreases...
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/PMC4858685/ https://www.ncbi.nlm.nih.gov/pubmed/27150936 http://dx.doi.org/10.1038/srep25574 |
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author | Qian, Jingwen Peng, Zhijian Shen, Zhenguang Zhao, Zengying Zhang, Guoliang Fu, Xiuli |
author_facet | Qian, Jingwen Peng, Zhijian Shen, Zhenguang Zhao, Zengying Zhang, Guoliang Fu, Xiuli |
author_sort | Qian, Jingwen |
collection | PubMed |
description | Resistivity-type humidity sensors have been investigated with great interest due to the increasing demands in industry, agriculture and daily life. To date, most of the available humidity sensors have been fabricated based on negative humidity impedance, in which the electrical resistance decreases as the humidity increases, and only several carbon composites have been reported to present positive humidity impedance. However, here we fabricate positive impedance humidity sensors only via single-component WO(3−x) crystals. The resistance of WO(3−x) crystal sensors in response to relative humidity could be tuned from a negative to positive one by increasing the compositional x. And it was revealed that the positive humidity impedance was driven by the defects of oxygen vacancy. This result will extend the application field of humidity sensors, because the positive humidity impedance sensors would be more energy-efficient, easier to be miniaturized and electrically safer than their negative counterparts for their lower operation voltages. And we believe that constructing vacancies in semiconducting materials is a universal way to fabricate positive impedance humidity sensors. |
format | Online Article Text |
id | pubmed-4858685 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-48586852016-05-19 Positive impedance humidity sensors via single-component materials Qian, Jingwen Peng, Zhijian Shen, Zhenguang Zhao, Zengying Zhang, Guoliang Fu, Xiuli Sci Rep Article Resistivity-type humidity sensors have been investigated with great interest due to the increasing demands in industry, agriculture and daily life. To date, most of the available humidity sensors have been fabricated based on negative humidity impedance, in which the electrical resistance decreases as the humidity increases, and only several carbon composites have been reported to present positive humidity impedance. However, here we fabricate positive impedance humidity sensors only via single-component WO(3−x) crystals. The resistance of WO(3−x) crystal sensors in response to relative humidity could be tuned from a negative to positive one by increasing the compositional x. And it was revealed that the positive humidity impedance was driven by the defects of oxygen vacancy. This result will extend the application field of humidity sensors, because the positive humidity impedance sensors would be more energy-efficient, easier to be miniaturized and electrically safer than their negative counterparts for their lower operation voltages. And we believe that constructing vacancies in semiconducting materials is a universal way to fabricate positive impedance humidity sensors. Nature Publishing Group 2016-05-06 /pmc/articles/PMC4858685/ /pubmed/27150936 http://dx.doi.org/10.1038/srep25574 Text en Copyright © 2016, Macmillan Publishers Limited 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 Qian, Jingwen Peng, Zhijian Shen, Zhenguang Zhao, Zengying Zhang, Guoliang Fu, Xiuli Positive impedance humidity sensors via single-component materials |
title | Positive impedance humidity sensors via single-component materials |
title_full | Positive impedance humidity sensors via single-component materials |
title_fullStr | Positive impedance humidity sensors via single-component materials |
title_full_unstemmed | Positive impedance humidity sensors via single-component materials |
title_short | Positive impedance humidity sensors via single-component materials |
title_sort | positive impedance humidity sensors via single-component materials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4858685/ https://www.ncbi.nlm.nih.gov/pubmed/27150936 http://dx.doi.org/10.1038/srep25574 |
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