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research article

Microscale Liquid Metal Conductors for Stretchable and Transparent Electronics

Dejace, Laurent Mirko  
•
Chen, Haotian  
•
Furfaro, Ivan  
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August 6, 2021
Advanced Materials Technologies

Integrated wearable electronics capable of transducing and transmitting biophysical information on complex and dynamic systems are attracting high interest across the consumer electronics, clinical, and research domains. Gallium and gallium-based liquid metals (LMs) emerge as promising conductor technology for wearables due to their excellent combination of electrical conductivity and mechanical compliance. However, LMs feature complex physical and chemical properties that pose significant manufacturability challenges. Herein, a microtechnology approach is presented to fabricate deformable, microscale LM conductors with high surface density and over large surface areas. Based on a combination of soft lithography, directional patterning, and thermal evaporation of gallium, this new technology enables a range of designs and geometries that can be used to form LM-based stretchable electronic conductors. The versatility of the technology enables a palette of circuit designs that can offer unrivaled transparency (T > 89%) or large metallization density (2/5 µm line/gap).

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Type
research article
DOI
10.1002/admt.202100690
Author(s)
Dejace, Laurent Mirko  
Chen, Haotian  
Furfaro, Ivan  
Schiavone, Giuseppe  
Lacour, Stéphanie  
Date Issued

2021-08-06

Publisher

Wiley

Published in
Advanced Materials Technologies
Article Number

2100690

Note

This is an Open Access article under the terms of the Creative Commons Attribution License

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSBI  
Available on Infoscience
August 9, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/180480
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