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Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films

We present an experimental demonstration of passive, dynamic thermal regulation in a solid-state system with temperature-dependent thermal emissivity switching. We achieve this effect using a multilayered device, comprised of a vanadium dioxide (VO(2)) thin film on a silicon substrate with a gold ba...

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Autores principales: Morsy, Ahmed M., Barako, Michael T., Jankovic, Vladan, Wheeler, Virginia D., Knight, Mark W., Papadakis, Georgia T., Sweatlock, Luke A., Hon, Philip W. C., Povinelli, Michelle L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7435187/
https://www.ncbi.nlm.nih.gov/pubmed/32811889
http://dx.doi.org/10.1038/s41598-020-70931-0
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author Morsy, Ahmed M.
Barako, Michael T.
Jankovic, Vladan
Wheeler, Virginia D.
Knight, Mark W.
Papadakis, Georgia T.
Sweatlock, Luke A.
Hon, Philip W. C.
Povinelli, Michelle L.
author_facet Morsy, Ahmed M.
Barako, Michael T.
Jankovic, Vladan
Wheeler, Virginia D.
Knight, Mark W.
Papadakis, Georgia T.
Sweatlock, Luke A.
Hon, Philip W. C.
Povinelli, Michelle L.
author_sort Morsy, Ahmed M.
collection PubMed
description We present an experimental demonstration of passive, dynamic thermal regulation in a solid-state system with temperature-dependent thermal emissivity switching. We achieve this effect using a multilayered device, comprised of a vanadium dioxide (VO(2)) thin film on a silicon substrate with a gold back reflector. We experimentally characterize the optical properties of the VO(2) film and use the results to optimize device design. Using a calibrated, transient calorimetry experiment we directly measure the temperature fluctuations arising from a time-varying heat load. Under laboratory conditions, we find that the device regulates temperature better than a constant emissivity sample. We use the experimental results to validate our thermal model, which can be used to predict device performance under the conditions of outer space. In this limit, thermal fluctuations are halved with reference to a constant-emissivity sample.
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spelling pubmed-74351872020-08-21 Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films Morsy, Ahmed M. Barako, Michael T. Jankovic, Vladan Wheeler, Virginia D. Knight, Mark W. Papadakis, Georgia T. Sweatlock, Luke A. Hon, Philip W. C. Povinelli, Michelle L. Sci Rep Article We present an experimental demonstration of passive, dynamic thermal regulation in a solid-state system with temperature-dependent thermal emissivity switching. We achieve this effect using a multilayered device, comprised of a vanadium dioxide (VO(2)) thin film on a silicon substrate with a gold back reflector. We experimentally characterize the optical properties of the VO(2) film and use the results to optimize device design. Using a calibrated, transient calorimetry experiment we directly measure the temperature fluctuations arising from a time-varying heat load. Under laboratory conditions, we find that the device regulates temperature better than a constant emissivity sample. We use the experimental results to validate our thermal model, which can be used to predict device performance under the conditions of outer space. In this limit, thermal fluctuations are halved with reference to a constant-emissivity sample. Nature Publishing Group UK 2020-08-18 /pmc/articles/PMC7435187/ /pubmed/32811889 http://dx.doi.org/10.1038/s41598-020-70931-0 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Morsy, Ahmed M.
Barako, Michael T.
Jankovic, Vladan
Wheeler, Virginia D.
Knight, Mark W.
Papadakis, Georgia T.
Sweatlock, Luke A.
Hon, Philip W. C.
Povinelli, Michelle L.
Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films
title Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films
title_full Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films
title_fullStr Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films
title_full_unstemmed Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films
title_short Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films
title_sort experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7435187/
https://www.ncbi.nlm.nih.gov/pubmed/32811889
http://dx.doi.org/10.1038/s41598-020-70931-0
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