Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Polywka, Andreas, Stegers, Luca, Krauledat, Oliver, Riedl, Thomas, Jakob, Timo, Görrn, Patrick
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
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
_version_ 1782493397536210944
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
work_keys_str_mv AT polywkaandreas controlledmechanicalcrackingofmetalfilmsdepositedonpolydimethylsiloxanepdms
AT stegersluca controlledmechanicalcrackingofmetalfilmsdepositedonpolydimethylsiloxanepdms
AT krauledatoliver controlledmechanicalcrackingofmetalfilmsdepositedonpolydimethylsiloxanepdms
AT riedlthomas controlledmechanicalcrackingofmetalfilmsdepositedonpolydimethylsiloxanepdms
AT jakobtimo controlledmechanicalcrackingofmetalfilmsdepositedonpolydimethylsiloxanepdms
AT gorrnpatrick controlledmechanicalcrackingofmetalfilmsdepositedonpolydimethylsiloxanepdms