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Controlled Mechanical Cracking of Metal Films Deposited on Polydimethylsiloxane (PDMS)
Stretchable large area electronics conform to arbitrarily-shaped 3D surfaces and enables comfortable contact to the human skin and other biological tissue. There are approaches allowing for large area thin films to be stretched by tens of percent without cracking. The approach presented here does no...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5224633/ https://www.ncbi.nlm.nih.gov/pubmed/28335296 http://dx.doi.org/10.3390/nano6090168 |
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author | Polywka, Andreas Stegers, Luca Krauledat, Oliver Riedl, Thomas Jakob, Timo Görrn, Patrick |
author_facet | Polywka, Andreas Stegers, Luca Krauledat, Oliver Riedl, Thomas Jakob, Timo Görrn, Patrick |
author_sort | Polywka, Andreas |
collection | PubMed |
description | Stretchable large area electronics conform to arbitrarily-shaped 3D surfaces and enables comfortable contact to the human skin and other biological tissue. There are approaches allowing for large area thin films to be stretched by tens of percent without cracking. The approach presented here does not prevent cracking, rather it aims to precisely control the crack positions and their orientation. For this purpose, the polydimethylsiloxane (PDMS) is hardened by exposure to ultraviolet radiation (172 nm) through an exposure mask. Only well-defined patterns are kept untreated. With these soft islands cracks at the hardened surface can be controlled in terms of starting position, direction and end position. This approach is first investigated at the hardened PDMS surface itself. It is then applied to conductive silver films deposited from the liquid phase. It is found that statistical (uncontrolled) cracking of the silver films can be avoided at strain below 35%. This enables metal interconnects to be integrated into stretchable networks. The combination of controlled cracks with wrinkling enables interconnects that are stretchable in arbitrary and changing directions. The deposition and patterning does not involve vacuum processing, photolithography, or solvents. |
format | Online Article Text |
id | pubmed-5224633 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-52246332017-03-21 Controlled Mechanical Cracking of Metal Films Deposited on Polydimethylsiloxane (PDMS) Polywka, Andreas Stegers, Luca Krauledat, Oliver Riedl, Thomas Jakob, Timo Görrn, Patrick Nanomaterials (Basel) Communication Stretchable large area electronics conform to arbitrarily-shaped 3D surfaces and enables comfortable contact to the human skin and other biological tissue. There are approaches allowing for large area thin films to be stretched by tens of percent without cracking. The approach presented here does not prevent cracking, rather it aims to precisely control the crack positions and their orientation. For this purpose, the polydimethylsiloxane (PDMS) is hardened by exposure to ultraviolet radiation (172 nm) through an exposure mask. Only well-defined patterns are kept untreated. With these soft islands cracks at the hardened surface can be controlled in terms of starting position, direction and end position. This approach is first investigated at the hardened PDMS surface itself. It is then applied to conductive silver films deposited from the liquid phase. It is found that statistical (uncontrolled) cracking of the silver films can be avoided at strain below 35%. This enables metal interconnects to be integrated into stretchable networks. The combination of controlled cracks with wrinkling enables interconnects that are stretchable in arbitrary and changing directions. The deposition and patterning does not involve vacuum processing, photolithography, or solvents. MDPI 2016-09-09 /pmc/articles/PMC5224633/ /pubmed/28335296 http://dx.doi.org/10.3390/nano6090168 Text en © 2016 by the authors; 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Communication Polywka, Andreas Stegers, Luca Krauledat, Oliver Riedl, Thomas Jakob, Timo Görrn, Patrick Controlled Mechanical Cracking of Metal Films Deposited on Polydimethylsiloxane (PDMS) |
title | Controlled Mechanical Cracking of Metal Films Deposited on Polydimethylsiloxane (PDMS) |
title_full | Controlled Mechanical Cracking of Metal Films Deposited on Polydimethylsiloxane (PDMS) |
title_fullStr | Controlled Mechanical Cracking of Metal Films Deposited on Polydimethylsiloxane (PDMS) |
title_full_unstemmed | Controlled Mechanical Cracking of Metal Films Deposited on Polydimethylsiloxane (PDMS) |
title_short | Controlled Mechanical Cracking of Metal Films Deposited on Polydimethylsiloxane (PDMS) |
title_sort | controlled mechanical cracking of metal films deposited on polydimethylsiloxane (pdms) |
topic | Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5224633/ https://www.ncbi.nlm.nih.gov/pubmed/28335296 http://dx.doi.org/10.3390/nano6090168 |
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