Cost-effective fabrication of liquid metals via a laser induced graphene stamp for highly-stretchable integrated optoelectronics  

作　　者：Weiqi Sun Li Xiang Zebang Luo Hui Wang Dong Li Anlian Pan 

机构地区：[1]College of Materials Science and Engineering,Hunan University,Changsha 410082,China

出　　处：《Nano Research》2024年第8期7603-7613,共11页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.62101181,2221001,62090035,52372146,U22A20138,and U19A2090);the National Key Research and Development Program(Nos.2022YFA1204300 and 2022YFA1402501);Natural Science Foundation of Hunan Province(No.2023JJ20016);the Key Program of Science and Technology Department of Hunan Province(Nos.2019XK2001 and 2020XK2001);the Key Research and Development Plan of Hunan Province(No.2023GK2012);the Science and Technology Innovation Program of Hunan Province(No.2021RC3061);the Open Project Program of Key Laboratory of Nanodevices and Applications,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences(No.22ZS01).

摘　　要：Stretchable electronics have found widespread applications in various fields such as wearable electronics,soft robots,and bioelectronics.As an important promising alternative of traditional rigid conductors,liquid metals have demonstrated immense potential to provide high conductivity and stretchability for the stretchable electronic systems.However,limited by their fluidity and high surface tension,challenges remain in achieving liquid metal patterns with low-cost,high-precision,large-scale,and complex geometry.Here,a fabrication technique was proposed based on laser-induced graphene(LIG)stamps to enable liquid metal self-selectively adhere to substrates.Liquid metal patterns could thus be achieved in different designed geometries and could be transferred onto stretchable substrates.The liquid metal patterns exhibit exceptional electrical conductivity(3.24×10^(6)S/m even under 1000%strain),high stretchability(1000%strain,maximum of 2500%),small resistance changes under significant deformations(with a quality factor of 62.5 under 1000%strain),and high resolution(down to 50μm).Utilizing the patterned liquid metals,a stretchable integrated multifunctional optoelectronic system was demonstrated,encompassing a stretchable display matrix,a pressure sensor array,a wireless powering coil,and cardiovascular sensors,which further highlight the remarkable application potential of liquid metals in optoelectronic user-interaction and advanced physiological monitoring.

关 键 词：liquid metal WETTABILITY selective adhesion transfer printing stretchable electronics 

分 类 号：TQ127.11[化学工程—无机化工]