Growth and field emission characteristics of carbon nanotubes using Co/Cr/Al multilayer catalyst

Huang-Chung Cheng*, Kao Chao Lin, Han Chung Tai, Chuan Ping Juan, Rui Ling Lai, Yaw Shine Liu, Hsia Wei Chen, Yu Ying Syu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

A multilayer catalyst, Co/Cr/Al, was employed to synthesize carbon nanotubes (CNTs) at atmospheric pressure by thermal chemical vapor deposition (thermal CVD). The relative growth rates, calculated on the basis of the average lengths of nanotubes grown at different temperatures, were utilized to estimate an activation energy of 0.84 eV for the multilayer catalyst. Such a low activation energy implies that the nucleation and growth of nanotubes could be effectively enhanced via the multilayer catalyst due to the well-distributed small catalytic nanoparticles by Al supporting layer and higher activity by Cr co-catalyst layer. It was also found that nanotubes grown using this configuration at 500°C exhibited excellent field emission characteristics, and showed a highly uniform emission image in a phosphor-coated anode plate.

Original languageEnglish
Pages (from-to)4359-4363
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number7 A
DOIs
StatePublished - 4 Jul 2007

Keywords

  • Activation energy
  • Carbon nanotubes (CNTs)
  • Field emission
  • Multilayer catalyst
  • Thermal chemical vapor deposition (thermal CVD)

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