Diameter effect on the sidewall functionalization of single-walled carbon nanotubes by addition of dichlorocarbene

Kang Zhang, Qing Zhang, Cao Liu, Nicola Marzari, Francesco Stellacci

Research output: Contribution to journalArticlepeer-review

Abstract

Dichlorocarbene is added to the sidewalls of single-walled carbon nanotubes (SWNTs) with diameters ranging from 1.2 to 2.2 nm. Small diameter SWNTs are found to react much more easily than large diameter SWNTs. Upon functionalization, the conductance could be largely preserved for almost all SWNTs, while an effective bandgap increase for functionalized metallic SWNTs (ma SWNTs) and a bandgap reduction for functionalized semiconducting SWNTs (s-SWNTs) are generally observed. The results suggest that [2 + 1] cycloaddition is an excellent choice of processing, resulting in SWNTs over a large diameter range with electronic properties that are almost unaffected. Furthermore, possible separation of SWNTs according to their diameters could be achieved due to the apparent diameter-dependent reactivity.

Original languageEnglish
Pages (from-to)5216-5223
Number of pages8
JournalAdvanced Functional Materials
Volume22
Issue number24
DOIs
Publication statusPublished - Dec 19 2012

Keywords

  • carbon nanotubes
  • conductance
  • dichlorocarbene
  • functionalization

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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