Cargando…

Wrinkled Thermo-Electric Meander-Shaped Element on a Thin Freestanding PDMS Membrane

Natural wrinkling of metal films on silicone substrates can appear by means of the metal sputtering process and can be described by the continuous elastic theory and non-linear wrinkling model. Here, we report the fabrication technology and behavior of thin freestanding Polydimethylsiloxane (PDMS) m...

Descripción completa

Detalles Bibliográficos
Autores principales: Bakhchova, Liubov, Deckert, Liudmila, Steinmann, Ulrike
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10220571/
https://www.ncbi.nlm.nih.gov/pubmed/37233569
http://dx.doi.org/10.3390/membranes13050508
_version_ 1785049249552007168
author Bakhchova, Liubov
Deckert, Liudmila
Steinmann, Ulrike
author_facet Bakhchova, Liubov
Deckert, Liudmila
Steinmann, Ulrike
author_sort Bakhchova, Liubov
collection PubMed
description Natural wrinkling of metal films on silicone substrates can appear by means of the metal sputtering process and can be described by the continuous elastic theory and non-linear wrinkling model. Here, we report the fabrication technology and behavior of thin freestanding Polydimethylsiloxane (PDMS) membranes equipped with thermo-electric meander-shaped elements. The Cr/Au wires were obtained on the silicone substrate by magnetron sputtering. We observe wrinkle formation and suppose furrows appear once PDMS returns to its initial state after the thermo-mechanical expansion during sputtering. Although the substrate thickness is usually a negligible parameter in the theory of wrinkle formation, we found that the self-assembled wrinkling architecture of the PDMS/Cr/Au varies due to the membrane thickness of 20 µm and 40 µm PDMS. We also demonstrate that the wrinkling of the meander wire affects its length, and it causes a 2.7 times higher resistance compared to a calculated value. Therefore, we investigate the influence of the PDMS mixing ratio on the thermo-electric meander-shaped elements. For the stiffer PDMS with a mixing ratio of 10:4, the resistance due to wrinkle amplitude alterations is 25% higher compared to the PDMS of ratio 10:1. Additionally, we observe and describe a thermo-mechanically induced motion behavior of the meander wires on completely freestanding PDMS membrane under applied current. These results can improve the understanding of wrinkle formation, which influences thermo-electric characteristics and may promote the integration of this technology in applications.
format Online
Article
Text
id pubmed-10220571
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-102205712023-05-28 Wrinkled Thermo-Electric Meander-Shaped Element on a Thin Freestanding PDMS Membrane Bakhchova, Liubov Deckert, Liudmila Steinmann, Ulrike Membranes (Basel) Article Natural wrinkling of metal films on silicone substrates can appear by means of the metal sputtering process and can be described by the continuous elastic theory and non-linear wrinkling model. Here, we report the fabrication technology and behavior of thin freestanding Polydimethylsiloxane (PDMS) membranes equipped with thermo-electric meander-shaped elements. The Cr/Au wires were obtained on the silicone substrate by magnetron sputtering. We observe wrinkle formation and suppose furrows appear once PDMS returns to its initial state after the thermo-mechanical expansion during sputtering. Although the substrate thickness is usually a negligible parameter in the theory of wrinkle formation, we found that the self-assembled wrinkling architecture of the PDMS/Cr/Au varies due to the membrane thickness of 20 µm and 40 µm PDMS. We also demonstrate that the wrinkling of the meander wire affects its length, and it causes a 2.7 times higher resistance compared to a calculated value. Therefore, we investigate the influence of the PDMS mixing ratio on the thermo-electric meander-shaped elements. For the stiffer PDMS with a mixing ratio of 10:4, the resistance due to wrinkle amplitude alterations is 25% higher compared to the PDMS of ratio 10:1. Additionally, we observe and describe a thermo-mechanically induced motion behavior of the meander wires on completely freestanding PDMS membrane under applied current. These results can improve the understanding of wrinkle formation, which influences thermo-electric characteristics and may promote the integration of this technology in applications. MDPI 2023-05-11 /pmc/articles/PMC10220571/ /pubmed/37233569 http://dx.doi.org/10.3390/membranes13050508 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
Bakhchova, Liubov
Deckert, Liudmila
Steinmann, Ulrike
Wrinkled Thermo-Electric Meander-Shaped Element on a Thin Freestanding PDMS Membrane
title Wrinkled Thermo-Electric Meander-Shaped Element on a Thin Freestanding PDMS Membrane
title_full Wrinkled Thermo-Electric Meander-Shaped Element on a Thin Freestanding PDMS Membrane
title_fullStr Wrinkled Thermo-Electric Meander-Shaped Element on a Thin Freestanding PDMS Membrane
title_full_unstemmed Wrinkled Thermo-Electric Meander-Shaped Element on a Thin Freestanding PDMS Membrane
title_short Wrinkled Thermo-Electric Meander-Shaped Element on a Thin Freestanding PDMS Membrane
title_sort wrinkled thermo-electric meander-shaped element on a thin freestanding pdms membrane
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10220571/
https://www.ncbi.nlm.nih.gov/pubmed/37233569
http://dx.doi.org/10.3390/membranes13050508
work_keys_str_mv AT bakhchovaliubov wrinkledthermoelectricmeandershapedelementonathinfreestandingpdmsmembrane
AT deckertliudmila wrinkledthermoelectricmeandershapedelementonathinfreestandingpdmsmembrane
AT steinmannulrike wrinkledthermoelectricmeandershapedelementonathinfreestandingpdmsmembrane