连续碳纳米管线及其应用  

Continuous carbon nanotube yarns and their applications

作　　者：姜开利[1,2] 李群庆[1,2] 范守善 

机构地区：[1]清华大学物理系,北京100084 [2]清华-富士康纳米科技研究中心,北京100084

出　　处：《物理》2003年第8期506-510,共5页Physics

基　　金：国家自然科学基金 (批准号 :5 9772 0 15 );国家重点基础研究发展计划 (批准号 :G19990 64 5 0 3 )资助项目

摘　　要：如何将碳纳米管组装成宏观尺度的结构对于碳纳米管的宏观应用来说具有重要意义 .自从碳纳米管被发现以来 ,在合成大面积碳纳米管阵列方面已经取得很多的进展 ,并有望应用于场发射平板显示器 .然而 ,在如何将碳纳米管顺排起来连成连续的长线方面则鲜有进展 .这里介绍的是作者最近的新发现 :当从一种作者称之为“超顺排”碳纳米管阵列中拔出一束碳纳米管时 ,碳纳米管以可自组织成一条连续的长线 .在这个过程中 ,“超顺排”碳纳米管阵列起的作用如同一个蚕茧 ,阵列中的碳纳米管则由范德瓦耳斯力首尾相连形成连续的纯碳纳米管线 .这种碳纳米管线平行排列起来构成的偏振片可以工作在紫外波段 .这种碳纳米管线还可以用作白炽灯的灯丝 ,仅需很小的功率就可以发出白炽光 .不仅如此 ,这种碳纳米管线经过高温处理后 ,强度和导电性都得到明显增强 ,这将使碳纳米管线在宏观领域内得到更多的应用 .Assembling carbon nanotubes (CNTs) into macroscopic structures is of great importance to their applications. Since their discovery much progress has been made in vertically aligning CNT into arrays on substrates, which has found use in field emission display. However, little work has been done on their lateral alignment into continuous CNT yarns or ropes. Here we show a new finding that CNTs can be self-assembled into yarns simply by pulling from super-aligned CNT arrays. In this process the CNT array serves as a cocoon. The pure CNT yarn is made of well-aligned CNT segments that are end-to-end jointed by van der Waals′ interaction. The CNT polarizer extending to the ultraviolet region was implemented by parallel aligning a large multitude of yarns. The yarns were also used as filaments of a light bulb, which emitted incandescent light with low power consumption. Moreover, the strength and the conductivity of the CNT yarns can be considerably enhanced by high temperature treatment, which may further lead to a variety of uses of the yarns at the macroscopic level.

关 键 词：连续碳纳米管线 碳纳米管 组装 场发射平板显示器 碳纳米管阵列 平行排列 偏振片 白炽光 灯丝 

分 类 号：O488[理学—固体物理]