Carbon encapsulation of magnetic metal nanoparticles: correlation between nanoscale structure of carbon matrix and electromagnetic properties
Аннотация
The dependence between the variation of microwave losses by a − C : H(Co) films measured at 10 GHz and alteration of Co content in the film was investigated. It was shown that microwave losses attain maximal value at approximately 33at.% of cobalt. This dependence may be explained in terms of the formation of Co-containing clusters having various shapes. Because of property of conductive flakes to absorb microwaves, fragments of graphene modified with Co are considered as candidates for the microwave absorption. Estimations of the flake size using Raman and transmission electron microscopy data allow reproduce initial conditions for mathematical simulation of physical properties of the flakes.
Об авторах
S. Kozyrev
Center for Advanced Studies
Россия
Россия
V. Ivanov-Omskii
A.F.Ioffe Physicotechnical Institute RAS
Россия
Россия
S. Yastrebov
A.F.Ioffe Physicotechnical Institute RAS
Россия
Россия
T. Zvonareva
A.F.Ioffe Physicotechnical Institute RAS
Россия
Россия
M. Chekulaev
A.F.Ioffe Physicotechnical Institute RAS
Россия
Россия
A. Siklitskaya
A.F.Ioffe Physicotechnical Institute RAS
Россия
Россия
Список литературы
1. T. Hayashi, S. Hirono, M. Tomita, S. Uremura. Magnetic thin films of cobalt nanocrystals encapsulated in graphite-like carbon. Nature, 381, P. 772–774 (1996).
2. A. Alexeev, E. Shtager, S. Kozyrev. Physical Foundation of Stealth Technology. Saint-Petersburg.: VVM Ltd Publishing, 283 p. (2007).
3. E. Banhart, E. Hernandez, M. Terrones. Extreme superheating and supercooling of encapsulated metals in fullerene-like shells. Phys. Rev. Lett., 90, P. 185502/1–4 (2003).
4. V. I. Ivanov-Omskii, A. V. Tolmatchev, S. G Yastrebov. Optical absorption of amorphous carbon doped with copper. Philos. Mag. B, 73, P. 715–722 (1996).
5. V. I. Ivanov-Omskii, A. V.Kolobov, A. B. Lodygin,S. G. Yastrebov. Size distribution of cobalt nanoclusters in an amorphous carbon matrix. Semiconductors, 38, P. 1416–1418 (2004).
6. L. V. Lutsev, S. V. Yakovlev, T. K. Zvonareva, A. P. Alexeyev, A. P. Starostin, S. P. Kozyrev. Microwave properties of granular amorphous carbon films with cobalt nanoparticles. J. Appl. Phys. 97, P. 104327/1– 6 (2005).
7. E. A. Smorgonskaya, T. K. Zvonareva, E. I. Ivanova, I. I. Novak, V. I. Ivanov-Omskii. One-Phonon Raman Spectra of Carbon in Composite Films prepared by modification of amorphous hydrogenated carbon by copper and cobalt. Phys.Solid.State, 45, P. 1658–1668 (2003).
8. V. I. Ivanov-Omskii, A. A. Sitnikova, A. A. Suvorova, T. K. Zvonareva. Carbon clusters growth under ion sputtering of graphite. Mol.Mat. 8, P. 99–102 (1996).
9. C.P. Bohren,D. Huffman. Absorption and Scattering of Light by Small Particles. Wiley,New Yotk, 530 p. (1983).
Рецензия
Для цитирования:
, , , , , . Наносистемы: физика, химия, математика. 2014;5(1):192-194.
For citation:
Kozyrev S.V., Ivanov-Omskii V.I., Yastrebov S.G., Zvonareva T.K., Chekulaev M.S., Siklitskaya A.V. Carbon encapsulation of magnetic metal nanoparticles: correlation between nanoscale structure of carbon matrix and electromagnetic properties. Nanosystems: Physics, Chemistry, Mathematics. 2014;5(1):192-194.
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