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Micromachines (Basel). 2019 Feb 11;10(2). pii: E113. doi: 10.3390/mi10020113.

Self-Healing Flexible Conductive Film by Repairing Defects via Flowable Liquid Metal Droplets.

Niu R1,2, Jin M3,4, Cao J5,6, Yan Z7,8, Gao J9,10, Wu H11,12, Zhou G13,14, Shui L15,16.

Author information

1
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. niuruiwen@m.scnu.edu.cn.
2
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China. niuruiwen@m.scnu.edu.cn.
3
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. jinml@scnu.edu.cn.
4
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China. jinml@scnu.edu.cn.
5
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. caojieping@m.scnu.edu.cn.
6
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China. caojieping@m.scnu.edu.cn.
7
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. zhibin.yan@m.scnu.edu.cn.
8
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China. zhibin.yan@m.scnu.edu.cn.
9
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. gaojw@scnu.edu.cn.
10
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China. gaojw@scnu.edu.cn.
11
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. haowu_cn@foxmail.com.
12
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China. haowu_cn@foxmail.com.
13
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. guofu.zhou@m.scnu.edu.cn.
14
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China. guofu.zhou@m.scnu.edu.cn.
15
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China. shuill@m.scnu.edu.cn.
16
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China. shuill@m.scnu.edu.cn.

Abstract

Self-healing flexible conductive films have been fabricated, evaluated, and applied. The film is composed of a fragile indium tin oxide (ITO) layer covered with sprayed liquid metal (LM) droplets. Self-healing of electrical conductivity is achieved via spontaneous capillary wicking of LM droplets into cracks/defects of the ITO film. The liquid metal adhering onto the ITO layer can also connect the ITO fragments during bending to keep the overall conductivity of the composite LM/ITO film stable. Stable and reversible electrowetting performance has been achieved with the composite LM/ITO as the conductive film, in either flat or curved states.

KEYWORDS:

conductive film; electrowetting; liquid metal; self-healing

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