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1.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Kuzubov A. A., Kovaleva E. A., Avramov P. V., Kholtobina A. S., Mikhaleva N. S., Kuklin A. V.
Заглавие
:
Buckminsterfullerene
's movability on the Fe(001) surface
Место публикации
: J. Magn. Magn. Mater.: Elsevier, 2016. - Vol. 410. - P.41-46. - ISSN 03048853 (ISSN),
DOI
10.1016/j.jmmm.2016.03.023
Примечания
: Cited References: 32. - This work was supported by the Russian Scientific Fund (Project no. 14-13-00139) and the Foundation for Assistance to Small Innovative Enterprises (FASIE) (Project no. 0011742). The authors would like to thank Institute of Computational Modeling of SB RAS, Krasnoyarsk; Joint Supercomputer Center of RAS, Moscow; Center of Equipment for Joint Use of Siberian Federal University, Krasnoyarsk; ICC of Novosibirsk State University and Siberian Supercomputer Center (SSCC) of SB RAS, Novosibirsk for providing the access to their supercomputers.
Предметные рубрики:
Initio molecular-dynamics
Total-energy calculations
Augmented-wave
Ключевые слова
(''Своб.индексиров.''):
buckminsterfullerene
--c60--fe(001)--spintronics--adsorption--relocation--dft
Аннотация:
Organic-based spintronics is one of the most fast-developing fields in nanoelectronics.
Buckminsterfullerene
-based composites are widely investigated due to its unique properties and there is a number of studies concerned with its interfaces with various types of substrates. Ferromagnetic surfaces are of a particular interest for potential spintronics applications. Based on the data reported in literature, we suppose that there are more than one stable structure in C60/Fe(001) composite system. Here we investigate different possible adsorption sites of C60 molecule and reveal the possibility of their coexistence and its influence on the composite properties. © 2016 Elsevier B.V.
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2.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Fedorov A. S., Fedorov D. A., Kuzubov A. A., Avramov P. V., Nishimura Y., Irle S., Witek H. A.
Заглавие
: Relative Isomer Abundance of Fullerenes and Carbon Nanotubes Correlates with Kinetic Stability
Разночтения заглавия
:авие SCOPUS: Relative isomer abundance of fullerenes and carbon nanotubes correlates with kinetic stability
Место публикации
: Phys. Rev. Lett.: AMER PHYSICAL SOC, 2011. - Vol. 107, Is. 17. - Ст.175506. - ISSN 0031-9007,
DOI
10.1103/PhysRevLett.107.175506
Примечания
: Cited References: 29. - S. I, P. V. A, and A. S. F gratefully acknowledge generous hospitality during their visits to Krasnoyarsk (S. I) and Fukui Institute for Fundamental Chemistry in Kyoto and Nagoya University (P. V. A and A. S. F) under support of the joint JSPS-RFBR travel grant 09-02-92107. This work was partially supported by National Science Council (grants NSC96-2113-M009-022-MY3 and NSC96-2113-M009-011-MY3) and Ministry of Education of Taiwan (MOE-ATU project), as well as by the JAEA Research fellowship (P. V. A). We thank the Institute of Computer Modeling (Siberian Division of RAS) and the Joint Supercomputer Center RAS for opportunity to use cluster computers for performing all calculations.
Предметные рубрики:
CHEMICAL MOLECULAR-DYNAMICS
C-60
BUCKMINSTERFULLERENE
MECHANISM
ROAD
Ключевые слова
(''Своб.индексиров.''): carbon nanostructures--kinetic factors--kinetic stability--thermal vibration--carbon nanotubes--fullerenes--isomers--kinetics
Аннотация:
A methodology to evaluate the kinetic stability of carbon nanostructures is presented based on the assumption of the independent and random nature of thermal vibrations. The kinetic stability is directly correlated to the cleavage probability for the weakest bond of a given nanostructure. The application of the presented method to fullerenes and carbon nanotubes yields clear correlation to their experimentally observed relative isomer abundances. The general and simple formulation of the method ensures its applicability to other nanostructures for which formation is controlled by kinetic factors.
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3.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Kuzubov A. A., Avramov P. V., Ovchinnikov S. G., Varganov S. A., Tomilin F. N.
Заглавие
: Electronic and atomic structures of the isomers of endohedral and exohedral fullerene complexes with two lithium atoms
Место публикации
: Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2001. - Vol. 43, Is. 9. - P1794-1799. - ISSN 1063-7834,
DOI
10.1134/1.1402242
Примечания
: Cited References: 21
Предметные рубрики:
VIBRATION-ROTATION BANDS
INFRARED ROTATION
C-60
BUCKMINSTERFULLERENE
ION
Аннотация:
The electronic structures of all the possible isomers of endohedral and exohedral C(60) fullerene complexes with two lithium atoms are theoretically investigated. It is found that the electronic structures of these compounds are characterized by an impurity filled-level state determining the band gap. The location of the impurity state and, correspondingly, the band gap of the exohedral fullerene complexes depend on the coordination mode and the distance between the alkali metal ions. A similar dependence is observed for the total energy of the exohedral fullerene complex under investigation. (C) 2001 MAIK "Nauka/ Interperiodica".
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4.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Avramov P. V., Yakobson B. I., Scuseria G. E.
Заглавие
: Mechanisms of inelastic scattering of low-energy protons by C6H6, C-60, C6F12, and C60F48 molecules
Разночтения заглавия
:авие SCOPUS: Mechanisms of inelastic scattering of low-energy protons by C 6H6, C60, C6F12, and C60F48 molecules
Место публикации
: Phys. Solid State: SPRINGER, 2006. - Vol. 48, Is. 1. - P177-184. - ISSN 1063-7834,
DOI
10.1134/S106378340601032X
Примечания
: Cited References: 23
Предметные рубрики:
DYNAMICS SIMULATIONS
FULLERENES
COMPLEXES
BUCKMINSTERFULLERENE
HELIUM
ATOMS
Аннотация:
The mechanisms of inelastic scattering of low-energy protons with a kinetic energy of 2-7 eV by C6H6, C6F12, C-60, and C60F48 molecules are studied using the methods of quantum chemistry and nonempirical molecular dynamics. It is shown that, for the C6H6 + proton and C-60 + proton systems, starting from a distance of 6 angstrom from the carbon skeleton, the electronic charge transfer from the aromatic molecule to H+ occurs with a probability close to unity and transforms the H+ ion into a hydrogen atom and the neutral C6H6 and C-60 molecules into cation radicals. The mechanism of interaction of low-energy protons with C6F12 and C60F48 molecules has a substantially different character and can be considered qualitatively as the interaction between a neutral molecule and a point charge. The Coulomb perturbation of the system arising from the interaction of the noncompensated proton charge with the Mulliken charges of fluorine atoms results in an inversion of the energies of the electronic states localized, on the one hand, on the positively charged hydrogen ion and, on the other hand, on the C6F12 and C60F48 molecules. As a result, the neutral molecule + proton state becomes the ground state. In turn, this inversion makes the electronic charge transfer energetically unfavorable. Quantum-chemical and molecular-dynamics calculations on different levels of theory showed that, for fluorine derivatives of some aromatic structures (C6F12, C60F48), the barriers to proton penetration through carbon hexagons are two to four times lower than for the corresponding parent systems (C6H6, C-60). This effect is explained by the absence of active pi-electrons in the case of fluorinated molecules.
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5.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Fedorov A. S., Kuzubov A. A., Kholtobina A. S., Kovaleva E. A., Knaup J., Irle S.
Заглавие
: Theoretical investigation of molecular and electronic structures of
buckminsterfullerene
-silicon quantum dot systems
Место публикации
: J. Phys. Chem. A: American Chemical Society, 2016. - Vol. 120, Is. 49. - P.9767-9775. - ISSN 1089-5639,
DOI
10.1021/acs.jpca.6b06959
Примечания
: Cited References:20. - The work was supported by Ministry of Education and Science of Russia (Russian-Japanese joined project, Agreement 14.613.21.0010, ID RFMEFI61314X0010). We are grateful to the Joint Supercomputer Center of Russian Academy of Sciences, Moscow and Siberian Supercomputer Center of SB RAS, Novosibirsk for the opportunity to use their computer clusters to perform the calculations. S.I. acknowledges partial support from a JST CREST grant.
Предметные рубрики:
Si
NANOPARTICLES
DYNAMICS
Аннотация:
Density functional theory (DFT) and density functional tight binding (DFTB) molecular dynamics Density functional theory (DFT) and density functional tight binding (DFTB) molecular dynamics (DFTB/MD) simulations of embedding and relaxation of
buckminsterfullerene
C60 molecules chemisorbed on (001) and (111) surfaces and inside bulk silicon lattice were performed. DFT calculations of chemisorbed fullerenes on both surfaces show that the C60 molecule deformation was very small and the C60 binding energies were roughly ∼4 eV. The charge analysis shows that the C60 molecule charges on (001) and (111) surfaces were between −2 and −3.5 electrons, respectively, that correlates well with the number of C–Si bonds linking the fullerene molecule and the silicon surface. DFT calculations of the C60 molecule inside bulk silicon confirm that the C60 molecule remains stable with the deformation energy values of between 11 and 15 eV for geometries with different C60 configurations. The formation of some C–Si bonds causes local silicon amorphization and corresponding electronic charge uptake on the embedded fullerene cages. Charge analysis confirms that a single C60 molecule can accept up to 20 excessive electrons that can be used in practice, wherein the main charge contribution is located on the fullerene’s carbon atoms bonded to silicon atoms. These DFT calculations correlate well with DFTB/MD simulations of the embedding process. In this process, the C60 molecule was placed on the top of the Si(111) surface, and it was further exposed by a stream of silicon dimers, resulting in subsequent overgrowth by silicon.
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