Low-energy electron irradiation of preheated and gas-exposed single-wall carbon nanotubes

P. A. Ecton, J. Beatty, G. Verbeck, W. Lakshantha, B. Rout, J. M. Perez

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We investigate the conditions under which electron irradiation at 2 keV of single-wall carbon nanotube (SWCNT) bundles produces an increase in the Raman D peak. We find that irradiation of SWCNTs that are preheated in situ at 600 °C for 1 h in ultrahigh vacuum before irradiation does not result in an increase in the D peak. Irradiation of SWCNTs that are preheated in vacuum and then exposed to air or gases results in an increase in the D peak, suggesting that adsorbates play a role in the increase in the D peak. Small diameter SWCNTs that are not preheated or preheated and then exposed to air show a significant increase in the D and G bands after irradiation. X-ray photoelectron spectroscopy shows no chemical shifts in the C 1s peak of SWCNTs that have been irradiated versus SWCNTs that have not been irradiated, suggesting that chemisorption of adsorbates is not responsible for the increase in the D peak.

Original languageEnglish
Pages (from-to)822-827
Number of pages6
JournalApplied Surface Science
Volume387
DOIs
Publication statusPublished - 30 Nov 2016
Externally publishedYes

Keywords

  • Carbon nanotubes
  • Defects
  • Electron irradiation

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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