X-Ray Emission Studies of the Valence Band of Nanodiamonds Annealed at Different Temperatures Full article
Journal |
The Journal of Physical Chemistry A
ISSN: 1089-5639 , E-ISSN: 1520-5215 |
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Output data | Year: 2001, Volume: 105, Number: 42, Pages: 9781-9787 Pages count : 7 DOI: 10.1021/jp011808o | ||||||
Tags | ONION-LIKE CARBON; ELECTRONIC-STRUCTURE; SHELL FULLERENES; DIAMOND; ABSORPTION; NANOTUBES; SPECTRA; SHAPE | ||||||
Authors |
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Affiliations |
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Funding (4)
1 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 00-237 |
2 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 97-1700 |
3 | The Ministry of Education and Science of the Russian Federation | 98055 |
4 | Russian Foundation for Basic Research | 00-03-32463 |
Abstract:
X-ray emission spectroscopy has been applied to examine the electronic structure of onion-like carbon (OLC) generated by the annealing treatment of nanodiamonds (ND). The C Kα spectra of OLC produced in the temperature range of 1600−1900 K were found to be markedly different from the spectrum of particles formed at 2140 K and to be characterized by better ordering of graphitic shells. The latter spectrum was shown to be very similar to the C Kα of polycrystalline graphite, while the former ones exhibited a significant increase of the high-energy maximum that might be caused by the defect structure of graphitic networks forming at the intermediate temperatures. The experimental spectra were compared with the theoretical spectra from quantum-chemical semiempirical AM1 calculation of several models: a fullerene molecule, C240, having icosahedral structure, a C240 molecule incorporating a greater number of nonhexagonal rings, and a holed structure formed by removing pentagons from the icosahedral molecule. The density of high-energy electronic states in the valence band of the graphitic cage was found to be practically invariant to a change in ring statistics but to significantly increase because of localization of electrons on the zigzag sites of a hole boundary.
Cite:
Okotrub A.V.
, Bulusheva L.G.
, Kuznetsov V.L.
, Butenko Y.V.
, Chuvilin A.L.
, Heggie M.I.
X-Ray Emission Studies of the Valence Band of Nanodiamonds Annealed at Different Temperatures
The Journal of Physical Chemistry A. 2001. V.105. N42. P.9781-9787. DOI: 10.1021/jp011808o WOS Scopus РИНЦ
X-Ray Emission Studies of the Valence Band of Nanodiamonds Annealed at Different Temperatures
The Journal of Physical Chemistry A. 2001. V.105. N42. P.9781-9787. DOI: 10.1021/jp011808o WOS Scopus РИНЦ
Dates:
Submitted: | May 11, 2001 |
Accepted: | Aug 6, 2001 |
Published online: | Sep 29, 2001 |
Published print: | Oct 1, 2001 |
Identifiers:
Web of science | WOS:000171805000021 |
Scopus | 2-s2.0-0035950798 |
Elibrary | 13382966 |
Chemical Abstracts | 2001:757945 |
Chemical Abstracts (print) | 136:12266 |
OpenAlex | W1983282239 |