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Citation: Zhang Qi-Feng, Yu Jie, Song Jiao-Hua, Zhang Geng-Min, Zhang Zhao-Xiang, Xue Zeng-Quan, Wu Jin-Lei. Fabrication of Aligned Carbon Nanotubes by a Vapor-phase Deposition Technique and Their Field Emission Properties[J]. Acta Physico-Chimica Sinica, ;2004, 20(04): 409-413. doi: 10.3866/PKU.WHXB20040416 shu

Fabrication of Aligned Carbon Nanotubes by a Vapor-phase Deposition Technique and Their Field Emission Properties

1.
Department of Electronics, Peking University, Beijing　100871

Received Date: 20 August 2003
Available Online: 15 April 2004

Well-aligned carbon nanotubes with multiwall structure were fabricated by using a vapor-phase deposition technique based on the pyrolysis of iron phthalocyanine. The average diameter of single nanotube is about 25 nm, and the length of each is from 4 to 5 μm. The result of measure on the planar field emission of the aligned carbon nanotubes shows a very powerful ability of as-synthesized carbon nanotubes in the field emission with a turn-on voltage of 1.28 V•μm－1 and a threshold voltage of 2.3 V•μm－1. The field emission image of the aligned carbon nanotubes was also observed through using a field emission microscope, and it was found that the field emission of the carbon nanotubes was mainly centered on the edge of the thin film sample, which was attributed to the screening effect caused by the overlarge density of the carbon nanotubes.
- Carbon nanotube;Vapor-phase deposition;Field emission;Screening effect
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