Highly Twisted Double-Helix Carbon Nanotube Yarns

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• 作者：Yuanyuan Shang ; Yibin Li ; Xiaodong He ; Shanyi Du ; Luhui Zhang ; Enzheng Shi ; Shiting Wu ; Zhen Li ; Peixu Li ; Jinquan Wei ; Kunlin Wang ; Hongwei Zhu ; Dehai Wu ; Anyuan Cao
• 刊名：ACS Nano
• 出版年：2013
• 出版时间：February 26, 2013
• 年：2013
• 卷：7
• 期：2
• 页码：1446-1453
• 全文大小：514K
• 年卷期：v.7,no.2(February 26, 2013)
• ISSN：1936-086X

文摘

The strength and flexibility of carbon nanotubes (CNTs) allow them to be constructed into a variety of innovated architectures with fascinating properties. Here, we show that CNTs can be made into a highly twisted yarn-derived double-helix structure by a conventional twist-spinning process. The double-helix is a stable and hierarchical configuration consisting of two single-helical yarn segments, with controlled pitch and unique mechanical properties. While one of the yarn components breaks early under tension due to the highly twisted state, the second yarn produces much larger tensile strain and significantly prolongs the process until ultimate fracture. In addition, these elastic and conductive double-helix yarns show simultaneous and reversible resistance change in response to a wide range of input sources (mechanical, photo, and thermal) such as applied strains or stresses, light illumination, and environmental temperature. Our results indicate that it is possible to create higher-level, more complex architectures from CNT yarns and fabricate multifunctional nanomaterials with potential applications in many areas.

Keywords:

carbon nanotube; helical yarn; double-helix; hierarchical structure; nanomaterial sensor