Electronic structure and field emission of multiwalled carbon nanotubes depending on growth temperature

Sang Won Yoon, Shin Young Kim, Jeunghee Park, Chan Jun Park, Cheol Jin Lee

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The electronic structure of multiwalled carbon nanotubes (CNTs) has been investigated, depending on the growth temperature, using synchrotron X-ray photoelectron spectroscopy (XPS) and field emission measurements. The vertically aligned CNTs are grown via pyrolysis of ferrocene and acetylene in a broad temperature range 600-1000°C. The CNTs have a cylindrical structure with a uniform diameter of 20 nm. As growth temperature increases, due to an improved crystallinity of the graphitic sheets, the width of the XPS C 1s peak becomes narrower and the intensity of the valence band increases. Field emission from the as-grown CNTs exhibits a large enhancement of current density with growth temperature, strongly correlated with the electronic structure revealed by XPS.

Original languageEnglish
Pages (from-to)20403-20406
Number of pages4
JournalJournal of Physical Chemistry B
Volume109
Issue number43
DOIs
Publication statusPublished - 2005 Nov 3

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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