Field emission improvement through structure of intermixture of long and short carbon nanotubes

Chuan Ping Juan*, Kao Chao Lin, Rui Ling Lai, Kuo Jui Chang, Huang-Chung Cheng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A novel density control with a structure of an intermixture of long and short carbon nanotubes (CNTs) is first obtained by precisely controlling pretreatment time and hydrogen content. This unique structure of CNTs is probably due to the uniform distribution of large and small iron nanoparticles under optimum pretreatment condition. Scanning electron microscopy is performed to confirm the morphology of catalytic nanoparticles after pretreatment. The obtained results show that a low turnon field (∼2.2 V/μm) and an ultra high field emission current density (0.4 A/cm2 at 6.46 V/μm) can be achieved through this novel structure of CNTs.

Original languageEnglish
Pages (from-to)859-862
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number2
DOIs
StatePublished - 8 Feb 2007

Keywords

  • Carbon nanotubes
  • Density control
  • Turn-on field

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