Synthesis, Characterization and Properties of Single-Walled Carbon Nanohorns

K. Pramoda, Kota Moses, Mohd Ikram, K. Vasu, A. Govindaraj, C. N.R. Rao

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Single-walled nanohorns (SWNHs) have been prepared by sub-merged arc discharge of graphite electrodes in liquid nitrogen. The samples were examined by scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. Nitrogen and boron doped SWNHs have been prepared by the sub-merged arc discharge method using melamine and elemental boron as precursors. Intensification of Raman D-band and stiffening of G-band has been observed in the doped samples. The electrical resistance of the SWNHs varies in opposite directions with nitrogen and boron doping. Functionalization of SWNHs through amidation has been carried out for solubilizing them in non-polar solvents. Water-soluble SWNHs have been produced by acid treatment and non-covalent functionalization with a coronene salt. SWNHs have been decorated with nanoparticles of Au, Ag and Pt. Interaction of electron donor (tetrathiafulvalene, TTF) and acceptor molecules (tetracyanoethylene, TCNE) with SWNHs has been investigated by Raman spectroscopy. Progressive softening and stiffening of Raman G-band has been observed respectively with increase in the concentration of TTF and TCNE.

Original languageEnglish
Pages (from-to)173-188
Number of pages16
JournalJournal of Cluster Science
Volume25
Issue number1
DOIs
StatePublished - 1 Jan 2014
Externally publishedYes

Keywords

  • Charge-transfer
  • Dahlia-like nanohorns
  • Doped nanohorns
  • Single-walled nanohorns
  • Sub-merged arc discharge

ASJC Scopus subject areas

  • Biochemistry
  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics

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