Band structure changes of single-wall carbon nanotubes by the presence of an ionic shell

被引：9
|
作者：
Dobrokhotov, VV [1 ]
Berven, CA [1 ]
机构：
[1] Univ Idaho, Dept Phys, Moscow, ID 83844 USA
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2006年 / 31卷 / 02期
基金：
美国国家科学基金会;
关键词：
band structure; carbon nanotubes; chemical sensors;
D O I：
10.1016/j.physe.2005.11.001
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report the change of the band structure of two types of carbon nanotubes due to the presence of all isolated, non-conducting, uniformly charged shell held at a fixed distance above their surfaces. We find that, depending on the chirality of the nanotube, the strain on the lattice causes the dispersion relationships to change. This change can result in a modification of the band structure which can induce a metal-semiconductor transition. We consider these effects as a mechanism for heavy-metal ion sensing by functionalized carbon nanotubes. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：160 / 164
页数：5
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