碳纳米管
化学气相沉积
纳米技术
手性(物理)
材料科学
催化作用
电化学
电子转移
化学工程
化学物理
电极
化学
有机化学
物理化学
手征对称破缺
量子力学
物理
夸克
工程类
Nambu–Jona Lasinio模型
作者
Jiaping Wang,Peng Liu,Bingyu Xia,Haoming Wei,Yang Wei,Yang Wu,Kai Li,Lína Zhang,Qunqing Li,Shanhui Fan,Kaili Jiang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2016-06-10
卷期号:16 (7): 4102-4109
被引量:30
标识
DOI:10.1021/acs.nanolett.6b00841
摘要
Carbon nanotube (CNT) is believed to be the most promising material for next generation IC industries with the prerequisite of chirality specific growth. For various approaches to controlling the chiral indices of CNTs, the key is to deepen the understanding of the catalytic growth mechanism in chemical vapor deposition (CVD). Here we show our discovery that the as-grown CNTs are all negatively charged after Fe-catalyzed CVD process. The extra electrons come from the charge generation and transfer during the growth of CNTs, which indicates that an electrochemical process happens in the surface reaction step. We then designed an in situ measurement equipment, verifying that the CVD growth of CNTs can be regarded as a primary battery system. Furthermore, we found that the variation of the Fermi level in Fe catalysts have a significant impact on the chirality of CNTs when different external electric fields are applied. These findings not only provide a new perspective on the growth of CNTs but also open up new possibilities for controlling the growth of CNTs by electrochemical methods.
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