연구진흥

창의적인 신지식 창출과 산업계와의 협력적 네트워크 구축

금주의 우수논문

SCI-E Article; Early Access
Monolithically Programmed Stretchable Conductor by Laser-Induced Entanglement of Liquid Metal and Metallic Nanowire Backbone
홍석준
  1. 성명
    홍석준
  2. 소속
    공학대학 기계공학과
  3. 캠퍼스
  4. 우수선정주
    2022년 08월 2째주
Author
홍석준 (Dept Mech Engn) corresponding author;
Corresponding Author Info
Ko, SH(해당 저자), Seoul Natl Univ, Dept Mech Engn, 1 Gwanak Ro, Seoul 08826, South Korea.; Hong, S(해당 저자), Hanyang Univ, BK21 FOUR ERICA ACE Ctr, Dept Mech Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea.; Ko, SH(해당 저자), Seoul Natl Univ, Ins
E-mail
이메일sukjoonhong@hanyang.ac.kr
Document Type
Article; Early Access
Source
SMALL Volume: Issue: Pages:- Published:
Times Cited
0
External Information
http://dx.doi.org/10.1002/smll.202202841
Abstract
Owing to its low mechanical compliance, liquid metal is intrinsically suitable for stretchable electronics and future wearable devices. However, its invariable strain-resistance behavior according to the strain-induced geometrical deformation and the difficulty of circuit patterning limit the extensive use of liquid metal, especially for strain-insensitive wiring purposes. To overcome these limitations, herein, novel liquid-metal-based electrodes of fragmented eutectic gallium-indium alloy (EGaIn) and Ag nanowire (NW) backbone of which their entanglement is controlled by the laser-induced photothermal reaction to enable immediate and direct patterning of the stretchable electrode with spatially programmed strain-resistance characteristics are developed. The coexistence of fragmented EGaIn and AgNW backbone, that is, a biphasic metallic composite (BMC), primarily supports the uniform and durable formation of target layers on stretchable substrates. The laser-induced photothermal reaction not only promotes the adhesion between the BMC layer and substrates but also alters the structure of laser-irradiated BMC. By controlling the degree of entanglement between fragmented EGaIn and AgNW, the initial conductivity and local gauge factor are regulated and the electrode becomes effectively insensitive to applied strain. As the configuration developed in this study is compatible with both regimes of electrodes, it can open new routes for the rapid creation of complex stretchable circuitry through a single process.
Web of Science Categories
Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
Funding
National Research Foundation of Korea [2021R1A2B5B03001691]
Language
English
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