碳纳米管纤维中的碳纳米管通过纳米粒子的排列：控制机械和电气性能的途径,ACS Applied Materials & Interfaces

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碳纳米管纤维中的碳纳米管通过纳米粒子的排列：控制机械和电气性能的途径
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-02-03 00:00:00 , DOI: 10.1021/acsami.6b12869
Muhammad Mohsin Hossain , Md. Akherul Islam ₁ , Hossain Shima ₂ , Mudassir Hasan ₃ , Moonyong Lee

Affiliation

这是第一项描述半导体ZnO如何在碳纳米管（CNTs）纤维中充当取向剂的研究。由于通过ZnO纳米粒子连接基团排列的CNT排列，纤维内部的CNT通过结合力的吸引被均匀地分布到片状束中，使得任何施加的机械断裂载荷均等地分布到纤维内部的每个CNT，使它们机械强度高，可抵抗断裂载荷。尽管此处使用了半导电的ZnO纳米颗粒，但排列的CNT纤维的电导率与裸露的CNT纤维相当，这表明通过排列的CNT纤维内部的CNT的总电子运动不会因ZnO纳米粒子的绝缘行为而受到干扰。ZnO纳米颗粒还显示出对电导率的高度控制，它们在纵向和横向方向上充当CNT之间的电子移动桥。还观察到组织良好的表面界面化学，这支持了纤维内部CNT排列的概念。这项研究代表了界面连接的CNT和ZnO纳米材料的表面界面化学的新领域，具有改善的机械性能和排列的CNT纤维内的电导率。

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Alignment of Carbon Nanotubes in Carbon Nanotube Fibers Through Nanoparticles: A Route for Controlling Mechanical and Electrical Properties

This is the first study that describes how semiconducting ZnO can act as an alignment agent in carbon nanotubes (CNTs) fibers. Because of the alignment of CNTs through the ZnO nanoparticles linking groups, the CNTs inside the fibers were equally distributed by the attraction of bonding forces into sheetlike bunches, such that any applied mechanical breaking load was equally distributed to each CNT inside the fiber, making them mechanically robust against breaking loads. Although semiconductive ZnO nanoparticles were used here, the electrical conductivity of the aligned CNT fiber was comparable to bare CNT fibers, suggesting that the total electron movement through the CNTs inside the aligned CNT fiber is not disrupted by the insulating behavior of ZnO nanoparticles. A high degree of control over the electrical conductivity was also demonstrated by the ZnO nanoparticles, working as electron movement bridges between CNTs in the longitudinal and crosswise directions. Well-organized surface interface chemistry was also observed, which supports the notion of CNT alignment inside the fibers. This research represents a new area of surface interface chemistry for interfacially linked CNTs and ZnO nanomaterials with improved mechanical properties and electrical conductivity within aligned CNT fibers.

更新日期：2017-02-03

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