Correlations between crystallite size, shape, surface, and infrared spectra using the Ti-C system

Y. Kimura, A. Ikegami, M. Kurumada, K. Kamitsuji, C. Kaito

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

TiC crystallites less than 10 nm in size showed an absorption feature at 14.3 μm. This 14.3 μm absorption was rarely seen in specimens ranging from bulk material to grains of 50 nm in size. The 14.3 μm feature was weakened as a result of the growth of TiC crystallites by heat treatment. When the carbide grains were covered with a carbon layer, the absorption peaks were considerably weakened, i.e., the absorption intensity depended on the grain surface state. A possible explanation is that the effects of size and shape on the spectra depend on the surface anisotropy.

Original languageEnglish
Pages (from-to)297-301
Number of pages5
JournalAstrophysical Journal, Supplement Series
Volume152
Issue number2
DOIs
Publication statusPublished - 2004 Jun

Keywords

  • Astrochemistry
  • Dust, extinction
  • ISM: molecules
  • Methods: laboratory
  • Molecular data

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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