Ultra-conformable liquid metal particle monolayer on air/water interface for substrate-free E-tattoo  

作　　者：Fali Li Wenjuan Lei Yuwei Wang Xingjian Lu Shengbin Li Feng Xu Zidong He Jinyun Liu Huali Yang Yuanzhao Wu Jie Shang Yiwei Liu Run-Wei Li 

机构地区：[1]CAS Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,P.R.China [2]Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,P.R.China [3]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,100049 Beijing,P.R.China

出　　处：《npj Flexible Electronics》2023年第1期244-252,共9页npj-柔性电子（英文）

基　　金：National Natural Science Foundation of China(552127803,51931011,51971233,62174165,M-0152,U20A6001,U1909215 and 52105286);External Cooperation Program of Chinese Academy of Sciences(174433KYSB20190038,174433KYSB20200013);K.C.Wong Education Foundation(GJTD-2020-11);the Instrument Developing Project of the Chinese Academy of Sciences(YJKYYQ20200030);Chinese Academy of Sciences Youth Innovation Promotion Association(2018334);“Pioneer”and“Leading Goose”R&D Program of Zhejiang(2022C01032);Zhejiang Provincial Key R&D Program(2021C01183);Natural Science Foundation of Zhejiang Province(LD22E010002);Ningbo Scientific and Technological Innovation 2025 Major Project(2019B10127,2020Z022);Zhejiang Provincial Basic Public Welfare Research Project(LGG20F010006);China Postdoctoral Science Foundation(2021M693249).

摘　　要：Gallium-based liquid metal has gained significant attention in conformal flexible electronics due to its high electrical conductivity,intrinsic deformability,and biocompatibility.However,the fabrication of large-area and highly uniform conformal liquid metal films remains challenging.Interfacial self-assembly has emerged as a promising method,but traditional approaches face difficulties in assembling liquid metal particles.Here,we realized the multi-size universal self-assembly(MUS)for liquid metal particles with various diameters(<500μm).By implementing a z-axis undisturbed interfacial material releasing strategy,the interference of gravitational energy on the stability of floating particles is avoided,enabling the fabrication of ultra-conformable monolayer films with large areas(>100 cm^(2))and high floating yield(50–90%).Moreover,the films can be conformally transferred onto complex surfaces such as human skin,allowing for the fabrication of substrate-free flexible devices.This eliminates interference from traditional substrate mechanical responses,making the liquid metal e-tattoo more user-friendly.

关 键 词：liquid FLOATING CONFORMAL 

分 类 号：TB31[一般工业技术—材料科学与工程]