In-situ deposition of sparse vertically aligned carbon nanofibres on catalytically activated stainless steel mesh for field emission applications

Matthew Cole, Kai Hou, Jamie H. Warner, J. S. Barnard, Kai Ying, Y. Zhang, C. Li, Kenneth B.K. Teo, W I Milne

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We report on an inexpensive, facile and industry viable carbon nanofibre catalyst activation process achieved by exposing stainless steel mesh to an electrolyzed metal etchant. The surface evolution of the catalyst islands combines low-rate electroplating and substrate dissolution. The plasma enhanced chemical vapour deposited carbon nanofibres had aspect-ratios > 150 and demonstrated excellent height and crystallographic uniformity with localised coverage. The nanofibres were well-aligned with spacing consistent with the field emission nearest neighbour electrostatic shielding criteria, without the need of any post-growth processing. Nanofibre inclusion significantly reduced the emission threshold field from 4.5 V/μm (native mesh) to 2.5 V/μm and increased the field enhancement factor to approximately 7000.

Original languageEnglish
Pages (from-to)66-71
Number of pages6
JournalDiamond and Related Materials
Volume23
DOIs
Publication statusPublished - Mar 2012

Keywords

  • Carbon nanofibres
  • Coatings
  • Electrochemical processing
  • Field emission

ASJC Scopus subject areas

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

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