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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 3: 535 - 538

DOI: https://doi.org/10.3724/sp.j.1077.2009.00535

Research Paper

Effect of Graphitization on the Structures and Conducting Property of Carbon Nanotubes

  • ZHANG Lin-Lin ,
  • XU Fang-Fang ,
  • FENG Jing-Wei ,
  • RUAN Mei-Ling
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  • 1. Inorganic Materials Analysis and Testing Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received date: 2008-09-04

  Revised date: 2008-11-25

  Online published: 2009-05-20

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Abstract

Turbostratic carbon nanotubes (CNTs) were treated in nitrogen atmosphere at 2700℃. Highresolution transmission electron microscope (HRTEM) was used to investigate the structural changes of CNTs. Meanwhile, the conducting property was measured via a selfbuilt setup installed in TEM. The structures of CNTs are found to change into bamboolike or tubular cones after graphitization. The apex angles of cones rang from 10° to 30°, and the tubular diameter ranges from 10nm to 40nm. Electron diffraction analysis reveals that an additional overlap angle is involved in the disclination operation of cones, suggesting the helicalconical structural characteristics of CNTs. The highly curved filamental structures are stabilized via interlayer coincidence site lattices of ∑13, ∑7, and ∑19type. The conducting measurement indicates that the helical conical CNTs are semiconductors.

Key words： carbon nanotubes; graphitization; helical cone; conducting property

Cite this article

ZHANG Lin-Lin , XU Fang-Fang , FENG Jing-Wei , RUAN Mei-Ling . Effect of Graphitization on the Structures and Conducting Property of Carbon Nanotubes[J]. Journal of Inorganic Materials, 2009 , 24(3) : 535 -538 . DOI: 10.3724/sp.j.1077.2009.00535

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