Fabrication of CNTs on Ni-cap electron emitters by using prenucleation technique

Yi-Chun Chen, You Ming Tsau, Yun Shuo Hsieh, Hsiu Fung Cheng, I. Nan Lin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this study, we have developed a novel technique for growing carbon nanotubes (CNTs) directly on Ni-caps. The gas phase nucleated CNTs were first deposited on the Ni-caps, followed by the growth of CNTs through a microwave induced heating process. In this process a specially designed substrate holder, W-coil on SiC cylinder, is used for resulting in rapid heating-up of the substrate via the absorption of the microwave power and forming appropriated temperature profile for the dissociation of ferrocene/CH4 prior to the formation of CNTs in gas phase in adjacent to Ni-caps. The as-nucleated CNTs are very small in size, about 10 nm in diameter and hundreds nanometer in length. The CNTs grew rapidly on the nuclei, to around 80 nm in diameter and several tens of micron in length, within 10 min. The CNTs exhibit large electron field emission capacity ((Je)g=5.8 mA/cm2 at 12.5 V/μm applied field) with (E0)g=8.0 V/μm turn-on field. The electron field emission properties of CNTs-coated Ni-caps are very stable after burn-in for a few voltage cycles. Thus formed Ni-caps can potentially be used as electron sources for cathode ray tubes (CRT).

Original languageEnglish
Pages (from-to)758-762
Number of pages5
JournalDiamond and Related Materials
Volume14
Issue number3-7
DOIs
Publication statusPublished - 2005 Mar 1

Fingerprint

Carbon Nanotubes
Carbon nanotubes
Fabrication
Electrons
Field emission
Gases
Microwaves
Electron sources
Industrial heating
Cathode ray tubes
Substrates
Heating
Electric potential

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Chen, Yi-Chun ; Tsau, You Ming ; Hsieh, Yun Shuo ; Cheng, Hsiu Fung ; Lin, I. Nan. / Fabrication of CNTs on Ni-cap electron emitters by using prenucleation technique. In: Diamond and Related Materials. 2005 ; Vol. 14, No. 3-7. pp. 758-762.
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Fabrication of CNTs on Ni-cap electron emitters by using prenucleation technique. / Chen, Yi-Chun; Tsau, You Ming; Hsieh, Yun Shuo; Cheng, Hsiu Fung; Lin, I. Nan.

In: Diamond and Related Materials, Vol. 14, No. 3-7, 01.03.2005, p. 758-762.

Research output: Contribution to journalArticle

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