Author:
Guo Chuan Fei,Liu Qihan,Wang Guohui,Wang Yecheng,Shi Zhengzheng,Suo Zhigang,Chu Ching-Wu,Ren Zhifeng
Abstract
Next-generation flexible electronics require highly stretchable and transparent electrodes. Few electronic conductors are both transparent and stretchable, and even fewer can be cyclically stretched to a large strain without causing fatigue. Fatigue, which is often an issue of strained materials causing failure at low strain levels of cyclic loading, is detrimental to materials under repeated loads in practical applications. Here we show that optimizing topology and/or tuning adhesion of metal nanomeshes can significantly improve stretchability and eliminate strain fatigue. The ligaments in an Au nanomesh on a slippery substrate can locally shift to relax stress upon stretching and return to the original configuration when stress is removed. The Au nanomesh keeps a low sheet resistance and high transparency, comparable to those of strain-free indium tin oxide films, when the nanomesh is stretched to a strain of 300%, or shows no fatigue after 50,000 stretches to a strain up to 150%. Moreover, the Au nanomesh is biocompatible and penetrable to biomacromolecules in fluid. The superstretchable transparent conductors are highly desirable for stretchable photoelectronics, electronic skins, and implantable electronics.
Funder
U.S. Department of Energy
National Science Foundation
HHS | National Institutes of Health
National Natural Science Foundation of China
DOD | Air Force Office of Scientific Research
Publisher
Proceedings of the National Academy of Sciences
Cited by
88 articles.
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