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Template-based carbon nanotubes and their application to a field emitter

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4 Author(s)
Jeong, Soo-Hwan ; Electrical and Computer Engineering Division and Department of Chemical Engineering, Pohang University of Science and Technology, San31, Hyoja-Dong, Nam-Ku, Pohang, Kyungbuk 790-784, Korea ; Hwang, Hee-Young ; Lee, Kun-Hong ; Jeong, Yongsoo

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Anodic aluminum oxide (AAO) templates were fabricated by anodizing Al films. After the Co catalyst had been electrochemically deposited into the bottom of the AAO template, carbon nanotubes (CNTs) were grown by the catalytic pyrolysis of C2H2 at 650 °C. Overgrowth of CNTs on the AAO templates was observed. The diameter of the CNTs strongly depends on the size of the pores in the AAO template. The electron field emission measurements on the samples showed a turn-on field of 1.9–2.1 V/μm and a field enhancement factor of 3360–5200. Our observation concerning the low turn-on field and high field enhancement factors is explained in terms of a low field screening effect. © 2001 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:78 ,  Issue: 14 )

Date of Publication:

Apr 2001

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