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

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

doi:10.1086/386373

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

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

SCI - Earth Science

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	297-301
Number of pages	5
Journal	Astrophysical Journal, Supplement Series
Volume	152
Issue number	2
DOIs	https://doi.org/10.1086/386373
Publication status	Published - 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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10.1086/386373

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

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.",

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T1 - Correlations between crystallite size, shape, surface, and infrared spectra using the Ti-C system

AU - Kimura, Y.

AU - Ikegami, A.

AU - Kurumada, M.

AU - Kamitsuji, K.

AU - Kaito, C.

PY - 2004/6

Y1 - 2004/6

N2 - 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.

AB - 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.

KW - Astrochemistry

KW - Dust, extinction

KW - ISM: molecules

KW - Methods: laboratory

KW - Molecular data

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