The effect of surface treatments on the field emission characteristics of patterned carbon nanotubes on KOVAR substrate

Keunsoo Lee, Yang Doo Lee, Byung Hyun Kang, Ki Young Dong, Jinho Baek, Vincent Lau Chun Fai, Won Seok Kim, Cheol Min Yang, Byeong Kwon Ju

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The field emission characteristics of patterned carbon nanotubes (CNTs) the average diameter of which is 16 nm cathodes on substrates with different surface treatments were investigated. The surface treatments of the substrate were performed by nickel electroless plating and palladium coating, which is an activation procedure of electroless plating. CNTs were patterned on the surface-treated substrate with radius of 200 μm through conventional photolithography process. Two deposition methods, electrophoresis deposition and spray deposition, were used to investigate the effects of deposition methods on field emission characteristics of the cathodes. It was revealed that the two deposition methods showed similar turn-on field trends, which means that the different surface morphologies of the substrates have more influence on the field emission characteristics than the different deposition methods performed in this study. Through the surface treatments, the roughness of the surface increased and cathodes with a high roughness factor showed better field emission characteristics compared to non-treated ones.

Original languageEnglish
Article number890
JournalJournal of Nanoparticle Research
Volume14
Issue number7
DOIs
Publication statusPublished - 2012

Keywords

  • Field emission characteristics
  • KOVAR
  • Multi-walled carbon nanotubes
  • Roughness factor
  • Surface treatment

ASJC Scopus subject areas

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

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