Field emission signature of pentagons at carbon nanotube caps

Mohammad Khazaei, Kenneth A. Dean, Amir A. Farajian, Yoshiyuki Kawazoe

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Localization of emitting states and their tunneling probabilities cause the nanotube cap geometry to have decisive impact on field emission patterns and currents. We show how different arrangements of pentagon rings at the tip can create specific field emission features, utilizing a method based on first principles calculations. The results give an explanation for different field emission patterns observed in experiments, and provide a feasible way to distinguish different cap structures from experimental results. A set of general rules is deduced to infer the tip configuration through the experimental field emission patterns. The calculations agree very well with our experimental results, and are of fundamental interest in characterization and design of carbon nanotube emitters and probes.

Original languageEnglish
Pages (from-to)6690-6693
Number of pages4
JournalJournal of Physical Chemistry C
Volume111
Issue number18
DOIs
Publication statusPublished - 2007 May 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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