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Rugged Island-Bridge Inorganic Electronics Mounted on Locally Strain-Isolated Substrates
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    Rugged Island-Bridge Inorganic Electronics Mounted on Locally Strain-Isolated Substrates
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    • Dae Hwan Lee
      Dae Hwan Lee
      Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, Gyeongbuk 37673, Republic of Korea
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    • Junwoo Yea
      Junwoo Yea
      Department of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988, Republic of Korea
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    • Jeongdae Ha
      Jeongdae Ha
      Department of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988, Republic of Korea
      More by Jeongdae Ha
    • Dohyun Kim
      Dohyun Kim
      Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, Gyeongbuk 37673, Republic of Korea
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    • Sungryong Kim
      Sungryong Kim
      Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, Gyeongbuk 37673, Republic of Korea
    • Junwoo Lee
      Junwoo Lee
      Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, Gyeongbuk 37673, Republic of Korea
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    • Jang-Ung Park
      Jang-Ung Park
      Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
    • Taiho Park*
      Taiho Park
      Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, Gyeongbuk 37673, Republic of Korea
      *Email: [email protected]
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    • Kyung-In Jang*
      Kyung-In Jang
      Department of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988, Republic of Korea
      ENSIDE Corporation, Daegu 42988, Republic of Korea
      *Email: [email protected]
    Other Access OptionsSupporting Information (5)

    ACS Nano

    Cite this: ACS Nano 2024, 18, 20, 13061–13072
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    https://doi.org/10.1021/acsnano.4c01759
    Published May 9, 2024
    Copyright © 2024 American Chemical Society

    Abstract

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    Various strain isolation strategies that combine rigid and stretchable regions for stretchable electronics were recently proposed, but the vulnerability of inorganic materials to mechanical stress has emerged as a major impediment to their performance. We report a strain-isolation system that combines heteropolymers with different elastic moduli (i.e., hybrid stretchable polymers) and utilize it to construct a rugged island-bridge inorganic electronics system. Two types of prepolymers were simultaneously cross-linked to form an interpenetrating polymer network at the rigid–stretchable interface, resulting in a hybrid stretchable polymer that exhibited efficient strain isolation and mechanical stability. The system, including stretchable micro-LEDs and microheaters, demonstrated consistent operation under external strain, suggesting that the rugged island-bridge inorganic electronics mounted on a locally strain-isolated substrate offer a promising solution for replacing conventional stretchable electronics, enabling devices with a variety of form factors.

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsnano.4c01759.

    • Time-lapse droplet PU island patterns formation in PDMS (MP4)

    • Strain isolation properties in hybrid stretchable polymers (MP4)

    • Hybrid stretchable polymers with 20 × 20 array (MP4)

    • Infrared video of microheaters under 0% and 30% strain (MP4)

    • Schematic illustration of the fabrication process; siloxane bonding process; pattern formation behavior; surface tension analysis; chemical structures and reaction mechanisms of PDMS and PU; time-lapse droplet formation of the PU prepolymer; analysis of interdiffusion; simultaneous interpenetrating network, sequential interpenetrating network, and non-interpenetrating network; evolution trend of storage modulus and loss modulus; rigid island patterning process; optical microscopy images; gradual strain reduction; strain distribution on the interface of the hybrid substrate; hexagonal arrangement of the rigid island and unit cell; tensile tests according to thickness; image of the hybrid stretchable polymer; equipment and optical microscopy images; comparison of microscopic images of electrode films, local deformation, and resistance changes; bare LED stretching test; μLED fabrication process; μLED metallization process; current–voltage curve; and microheater fabrication process (PDF)

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    This article is cited by 2 publications.

    1. Yan Wang, Jingmei Zhang, Deqiang Wang, Zeyu Wang, Hao Wang, Jinlou Gu. Synthesis of β-Si3N4 powders via sol-gel process combined with carbothermal reduction and nitridation. Journal of Solid State Chemistry 2025, 342 , 125110. https://doi.org/10.1016/j.jssc.2024.125110
    2. Shuang Wang, Yangfan Chai, Huiwen Sa, Weikang Ye, Qian Wang, Yu Zou, Xuan Luo, Lijuan Xie, Xiangjiang Liu. Sunflower-like self-sustainable plant-wearable sensing probe. Science Advances 2024, 10 (49) https://doi.org/10.1126/sciadv.ads1136

    ACS Nano

    Cite this: ACS Nano 2024, 18, 20, 13061–13072
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsnano.4c01759
    Published May 9, 2024
    Copyright © 2024 American Chemical Society

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