Electrical current-induced structural changes and chemical functionalization of carbon nanotubes

被引:21
作者
Agrawal, S. [1 ]
Raghuveer, M. S.
Kroeger, R.
Ramanath, G.
机构
[1] Rensselaer Polytech Inst, Mat Sci & Engn Dept, Troy, NY 12180 USA
[2] Univ Bremen, Inst Festkorperphys, D-28359 Bremen, Germany
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.2363816
中图分类号
O59 [应用物理学];
学科分类号
摘要
We demonstrate that high current densities, combined with air exposure can slice, weld, and chemically functionalize multiwalled carbon nanotubes (CNTs) with carboxyl and allyl moieties, and alter the electrical properties. The conductance of thin film assemblies of CNTs increases by 150%, indicating that the increase in the number of low-resistance pathways caused by CNT junction formation offsets the conductance decrease expected from defect creation, surface functionalization, and fissure. Such welded high-conductance CNT networks of functionalized CNTs could be useful for device and sensor applications, and may serve as high mechanical toughness mat fillers that are amenable to integration with nanocomposite matrices. (c) 2006 American Institute of Physics.
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页数:5
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