Raman characterization and UV optical absorption studies of surface plasmon resonance in multishell nanographite

V. Yu Osipov, A. V. Baranov, V. A. Ermakov, T. L. Makarova, L. F. Chungong, A. I. Shames, K. Takai, T. Enoki, Y. Kaburagi, M. Endo, A. Ya Vul

Research output: Contribution to journalArticlepeer-review

Abstract

Nanographite (NG) particles were produced by annealing of superpurified detonation nanodiamonds (grain size ∼ 5 nm) at 1600 °C. The aim of this research was to provide Raman characterization of nanographites obtained and to investigate characteristic features of UV optical absorption in NG suspensions caused by the excitation of surface plasmon resonance (SPR) and its dependence on disorder and defectiveness of graphene shells during their transformation. The 1-st and 2-nd order Raman spectra of the NG samples excited at 514 nm were analyzed. Two different approaches applied for evaluation of the in-plane NG crystallite sizes by using the D- and G-band intensities ratio gave quite different results (∼ 3.5 nm and ∼ 5.5 nm) reflecting, most likely, a complicated NG structure. The changes in both intensity and position of SPR absorption peak for water suspension of NG particles may originate in structural imperfections and/or changes in aggregation of NG particles.

Original languageAmerican English
Pages (from-to)205-209
Number of pages5
JournalDiamond and Related Materials
Volume20
Issue number2
DOIs
StatePublished - 1 Feb 2011

Keywords

  • Grain boundaries
  • Nanographite
  • Raman characterization
  • UV optical absorption
  • Zigzag edges

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

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