Self-Healable, Recyclable Anisotropic Conductive Films of Liquid Metal-Gelatin Hybrids for Soft Electronics

Young Geun Park, Jiuk Jang, Hyobeom Kim, Jae Chul Hwang, Yong Won Kwon, Jang Ung Park

Research output: Contribution to journalArticlepeer-review

Abstract

This paper reports an unconventional approach for the formation of self-healable and recyclable anisotropic conductive films (ACFs) using soft composites of gelatin hydrogels and liquid metals (LMs). The capsules of LMs dispersed inside the gelatin matrix can present satisfactory anisotropic conductance for electrical connections of vertically aligned, fine electrodes at room temperature by applying compressive pressures. The minimization of the capsule size as well as the softness of these LM-gelatin hybrid ACFs enables high-resolution integrations of deformable electronic systems, which can increase the integrity of freeform devices. In addition, the good fluidity of LMs and strong hydrogen bonding in gelatin enable these ACFs to be self-healable at ambient conditions and even recyclable with no significant degradations in either their original electrical or mechanical properties. The utilization of these ACFs to integrate multiple interconnections of micro-light-emitting diode arrays on a soft elastomeric substrate demonstrates a stretchable display with its reliable operations during mechanical deformations, suggesting a promising strategy for next-generation freeform and eco-friendly green electronics.

Original languageEnglish
Article number2101034
JournalAdvanced Electronic Materials
Volume8
Issue number4
DOIs
Publication statusPublished - 2022 Apr

Bibliographical note

Funding Information:
Y.-G.P., J.J., and H.K. contributed equally to this work. This work was supported by LG Display under LGD-Yonsei Incubation Program (C2020005791) as well as the Ministry of Trade, Industry and Energy (MOTIE) of Korea through the National Research Foundation for Nano Material Technology Development Program (2021M3H4A1A01079416?and 2021M3D1A204991411), the Bio & Medical Technology Development Program (2018M3A9F1021649), the Korea Initiative for fostering University of Research and Innovation (KIURI) Program (2020M3H1A1077207), and the Technology Innovation Program (20010366 and 20013621, Center for Super Critical Material Industrial Technology). Also, the authors thank financial support by the Institute for Basic Science (IBS-R026-D1) and Y.-G. P. thanks the Sejong Science Fellowship (2021R1C1C2008657). In addition, J. Jang appreciates the Primary Research Program (21A01015) of the Korea Electrotechnology Research Institute (KERI).

Funding Information:
Y.‐G.P., J.J., and H.K. contributed equally to this work. This work was supported by LG Display under LGD‐Yonsei Incubation Program (C2020005791) as well as the Ministry of Trade, Industry and Energy (MOTIE) of Korea through the National Research Foundation for Nano Material Technology Development Program (2021M3H4A1A01079416 and 2021M3D1A204991411), the Bio & Medical Technology Development Program (2018M3A9F1021649), the Korea Initiative for fostering University of Research and Innovation (KIURI) Program (2020M3H1A1077207), and the Technology Innovation Program (20010366 and 20013621, Center for Super Critical Material Industrial Technology). Also, the authors thank financial support by the Institute for Basic Science (IBS‐R026‐D1) and Y.‐G. P. thanks the Sejong Science Fellowship (2021R1C1C2008657). In addition, J. Jang appreciates the Primary Research Program (21A01015) of the Korea Electrotechnology Research Institute (KERI).

Publisher Copyright:
© 2021 Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

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