Anomalous Stretchable Conductivity Using an Engineered Tricot Weave
详细信息 查看全文
- 作者：Yong-Hee Lee ; Yoonseob Kim ; Tae-Ik Lee ; Inhwa Lee ; Jaeho Shin ; Hyun Soo Lee ; Taek-Soo Kim ; Jang Wook Choi
- 刊名：ACS Nano
- 出版年：2015
- 出版时间：December 22, 2015
- 年：2015
- 卷：9
- 期：12
- 页码：12214-12223
- 全文大小：938K
- ISSN：1936-086X
文摘
Robust electric conduction under stretching motions is a key element in upcoming wearable electronic devices but is fundamentally very difficult to achieve because percolation pathways in conductive media are subject to collapse upon stretching. Here, we report that this fundamental challenge can be overcome by using a parameter uniquely available in textiles, namely a weaving structure. A textile structure alternately interwoven with inelastic and elastic yarns, achieved via a tricot weave, possesses excellent elasticity (strain up to 200%) in diagonal directions. When this textile is coated with conductive nanomaterials, proper textile engineering allows the textile to obtain an unprecedented 7-fold conductivity increase, with conductivity reaching 33,000 S cm鈥?, even at 130% strain, due to enhanced interyarn contacts. The observed stretching conductivity can be described well using a modified 3D percolation theory that reflects the weaving effect and is also utilized for stretchable electronic interconnects and supercapacitors with high performance.