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Direct Writing and Repairable Paper Flexible Electronics Using Nickel–Liquid Metal Ink
Author(s) -
Chang Hao,
Guo Rui,
Sun Ziqiao,
Wang Hongzhang,
Hou Yi,
Wang Qian,
Rao Wei,
Liu Jing
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201800571
Subject(s) - materials science , nickel , electronics , liquid metal , alloy , gallium , metal , flexible electronics , electronic materials , electrical conductor , nanotechnology , elastomer , electronic circuit , inkwell , composite material , metallurgy , electrical engineering , engineering
Liquid metals such as gallium and its alloys can be printed on various substrates to form electronic circuits. However, up to now there are still few methods for the direct writing of liquid metals on common printed paper. Here, a novel conductive material prepared by adding metal powder to a gallium alloy is introduced. The proposed material exhibits low liquidity, excellent plasticity, significantly enhanced adhesivity to paper substrates, which guarantee the stable and flexible electrical connection. The oxide film wrapping the nickel powder forms a skeleton for additional oxidation products, resulting in superior adhesion to paper. In addition, several paper flexible electronic applications are showcased to demonstrate the practical value and reparability of this material. This work paves the way for the design of a facile method of preparing paper electronics.