Electrohydrodynamic (EHD) Printing of Molten Metal Ink for Flexible and Stretchable Conductor with Self-Healing Capability

被引:73
|
作者
Han, Yiwei [1 ]
Dong, Jingyan [1 ]
机构
[1] North Caroline State Univ, Dept Ind & Syst Engn, Raleigh, NC 27695 USA
来源
ADVANCED MATERIALS TECHNOLOGIES | 2018年 / 3卷 / 03期
基金
美国国家科学基金会;
关键词
direct metal printing; electrohydrodynamic (EHD) printing; flexible and stretchable electronics; printed electronics; self-healing circuits; THIN-FILM TRANSISTORS; GALLIUM-INDIUM ALLOY; HIGH-RESOLUTION; ORGANIC ELECTRONICS; ROOM-TEMPERATURE; LARGE-AREA; LOW-COST; CIRCUITS; FABRICATION; SENSORS;
D O I
10.1002/admt.201700268
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Direct printing of flexible and stretchable conductors provides a low-cost mask-less approach for the fabrication of next-generation electronics. In this work, an electrohydrodynamic (EHD) printing technology is studied to achieve high-resolution printing of low-melting-point metal alloys, which enables low-cost direct fabrication of metallic conductors with sub 50 mu m resolution. The EHD printed microscale metallic conductors represent a promising way to create conductive paths with metallic conductivity and excellent flexibility and stretchability. A stable electrical response is achieved after hundreds of bending cycles and during stretching/releasing cycles in a large range of tensile strain (0-70%) for the printed conductors with properly designed 2D patterns. Due to the low melting point of the metal alloy ink, the printed conductor demonstrates self-healing capability that recovers from failure simply by heating the device above the eutectic temperature of the metal ink and applying slight pressure. A high-density touch sensor array is fabricated to demonstrate the high-resolution capability of the EHD printing for the direction fabrication of flexible and stretchable devices.
引用
收藏
页数:8
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