Gallium-Indium-Tin Liquid Metal Nanodroplet-Based Anisotropic Conductive Adhesives for Flexible Integrated Electronics

Authors

Guyue Bo, University of Wollongong
Huiwu Yu, Northwest University
Long Ren, University of Wollongong
Ningyan Cheng, University of Wollongong
Haifeng Feng, University of Wollongong
Xun Xu, University of Wollongong
Shi Xue Dou, University of Wollongong
Hongqiang Wang, State Key Laboratory of Solidification Processing
Yi Du, University of Wollongong

Publication Name

ACS Applied Nano Materials

Abstract

Compared with traditional solder joint bonding, an anisotropic conductive adhesive (ACA) provides an efficient and simple method for the interconnection of small-scale electronics. The wider application of ACAs for nanoelectronics is still suppressed, however, by the lack of durable and cost-effective conductive components. Herein, a series of core-shell eutectic gallium-indium-tin liquid metal (LM) nanodroplets (NDs) with different diameters have been successfully synthesized and regulated by a combination of laser irradiation and sonication. Due to their high conductivity and good fluidity, these LM NDs were used as soft conductive filler micro/nanoparticles for fabricating ACAs. The as-prepared ND-based ACAs present satisfactory anisotropic conductivity when used to interconnect small-scale electronic circuits. Highly durable anisotropic electrical performance was also maintained in flexible packed devices, even under bending or twisting operation modes.

Open Access Status

This publication is not available as open access

Volume

4

Issue

1

First Page

550

Last Page

557

Funding Number

DP160102627

Funding Sponsor

Australian Research Council