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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Glushchenko G. A., Leonova T. A., Kolonenko A. L., Dudnik A. I., Osipova I. V., Vnukova N. G., Nemtsev I. V., Zharkov S. M., Churilov G. N.
Заглавие : Synthesis of 6H-SiC single-crystal nanowires in a flow of carbon-silicon high-frequency arc plasma
Место публикации : Phys. Solid State: Pleiades Publishing, 2014. - Vol. 56, Is. 10. - P.2107-2111. - ISSN 1063-7834, DOI 10.1134/S106378341410014X. - ISSN 1090-6460
Примечания : Cited References: 34. - This study was supported by the National Academy of Sciences of Belarus and the Siberian Branch of the Russian Academy of Sciences within the framework of the Interdisciplinary Integration project no. 24.
Предметные рубрики: LARGE-SCALE SYNTHESIS
BETA-SIC NANOWIRES
FIELD-EMISSION PROPERTIES
CARBIDE NANOWIRES
NANORODS
GROWTH
NANOSTRUCTURES
FULLERENES
DISCHARGE
Аннотация: Silicon carbide 6H-SiC nanoparticles and nanowires were obtained in carbon-silicon high-frequency arc plasma plasma in a helium atmosphere at a pressure of 0.1-0.6 MPa. It was shown that 6H-SiC nanowires grow from the arc plasma, as well as from the vapor, according to the known mechanism of vapor-solid condensation on a cold surface covered with single-crystal silicon carbide nuclei. The content of silicon carbide nanowires in the condensate reached 60 wt %. The obtained single-crystal silicon 6H-SiC nanowires had the diameter of 15-18 nm and length of 200-600 nm.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Samardak A. S., Nasirpouri F., Nadi M., Sukovatitsina E. V., Ognev A. V., Chebotkevich L. A., Komogortsev S. V.
Заглавие : Conversion of magnetic anisotropy in electrodeposited Co-Ni alloy nanowires
Коллективы : Russian Ministry of Education and Science, Far Eastern Federal University, Iranian Nanotechnology Initiative Council
Место публикации : J. Magn. Magn. Mater.: ELSEVIER SCIENCE BV, 2015. - Vol. 383. - P.94-99. - ISSN 0304, DOI 10.1010/j.jmmm.2014.10.047. - ISSN 18734766(eISSN)
Примечания : Cited References:24. - This work was supported in part by the Russian Ministry of Education and Science and Far Eastern Federal University. M.N acknowledges the student financial support of Iranian Nanotechnology Initiative Council.
Предметные рубрики: COBALT NANOWIRES
ARRAYS
Ключевые слова (''Своб.индексиров.''): coercive force--magnetic anisotropy--magnetic hysteresis--binary alloy--nanowires--alumina template--electrodeposition
Аннотация: In this paper, the influence of alternating current (ac) electrodeposition frequency and waveform is reported on chemical composition, microstructure and consequently magnetic properties of Co-Ni binary alloy nanowire arrays embedded in an alumina template. For sinusoidal and square electrodeposition waveforms the easy axis of magnetization rotates from being parallel to perpendicular orientation to nanowire long axis as the deposition frequency increases from 200 to 800 Hz. The reason for the drastic change of magnetic anisotropy in nanowires is attributed to the increase of cobalt content and the crystal structure phase transformation from fcc-hcp mixture at high Ni content to imp at high Co content. We explain the conversion of magnetic behavior of nanowire arrays in terms of a competition between the shape and magnetocrystalline anisotropies. (C) 2014 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nasirpouri F., Peighambari S. M., Samardak A. S., Ognev A. V., Sukovatitsina E. V., Modin E. B., Chebotkevich L. A., Komogortsev S. V., Bending S. J.
Заглавие : Electrodeposited Co93.2P6.8 nanowire arrays with core-shell microstructure and perpendicular magnetic anisotropy
Коллективы : Russian Ministry of Education and Science [559]; Far Eastern Federal University
Место публикации : J. Appl. Phys.: American Institute of Physics, 2015. - Vol. 117, Is. 17. - Ст.17E715. - ISSN 0021, DOI 10.1063/1.4919124. - ISSN 10897550(eISSN)
Примечания : Cited References:30. - Alexander Samardak and his colleagues acknowledge the support of the Russian Ministry of Education and Science under the state task 559 and Far Eastern Federal University.
Предметные рубрики: FERROMAGNETIC NANOWIRES
STRUCTURAL-PROPERTIES
NI
ALUMINA
FE
Аннотация: We demonstrate the formation of an unusual core-shell microstructure in Co93.2P6.8 nanowires electrodeposited by alternating current (ac) in an alumina template. By means of transmission electron microscopy, it is shown that the coaxial-like nanowires contain amorphous and crystalline phases. Analysis of the magnetization data for Co-P alloy nanowires indicates that a ferromagnetic core is surrounded by a weakly ferromagnetic or non-magnetic phase, depending on the phosphor content. The nanowire arrays exhibit an easy axis of magnetization parallel to the wire axis. For this peculiar composition and structure, the coercivity values are 2380 ± 50 and 1260 ± 35 Oe, parallel and perpendicular to the plane directions of magnetization, respectively. This effect is attributed to the core-shell structure making the properties and applications of these nanowires similar to pure cobalt nanowires with an improved perpendicular anisotropy.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Samardak A. S., Ognev A. V., Sukovatitsina E. V., Chebotkevich L. A., Komogortsev S. V., Bending S. J., Peighambari S. M., Nasirpouri F.
Заглавие : Magnetic anisotropy of electrodeposited CoP nanowires with coaxial core-shell structure
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2014): 29 June - 3 July 2014 : вook of abstracts. - 2014. - Ст.30OR-B-7. - P.88. - ISBN 978-5-91978-025-0
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Nasirpouri F., Peighambari S. M., Sukovatitsina E. V., Samardak A. S., Chebotkevich L. A., Komogortsev S. V.
Заглавие : The influence of frequency and waveform on the structure and magnetic properties of cobalt nanowires produced by AC Electrodeposition
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - P.131. - ISBN 978-5-7444-3124-2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zeer G. M., Zelenkova E. G., Nikolaeva N. S., Zharkov S. M., Pochekutov S. I., Ledyaeva O. N., Sartpaeva A. B., Mikheev A. A.
Заглавие : Formation of phases and microstructure of ZnO and TiO2 based ceramic
Коллективы : Russian Foundation for Fundamental Research [13-08-01003-a]; Ministry of Education of the Russian Federation
Место публикации : Glass Ceram.: Springer, 2015. - Vol. 72, Is. 7-8. - P.242-245. - ISSN 0361-7610, DOI 10.1007/s10717-015-9765-8. - ISSN 1573-8515(eISSN)
Примечания : Cited References:15. - This work was supported in part by the Russian Foundation for Fundamental Research (Grant No. 13-08-01003-a) and the Ministry of Education of the Russian Federation (as part of scientific research tasked by the state to the Siberian Federal University for 2014).
Предметные рубрики: GLASS ENAMEL COATINGS
NANOWIRES
Ключевые слова (''Своб.индексиров.''): electrocontact materials--metal oxides--zinc titanate--nanopowders--ceramic--microstructure--phase formation
Аннотация: Nanopowders of zinc and titanium oxides were used to obtain samples of Zn2TiO4-ZnO ceramic. Phase formation as well as the microstructure and elemental composition of the phases formed were studied by means of electron microscopy. The density and porosity were calculated, and the sizes of grains and pores in the ceramic were determined. The temperature at the zinc titanate forms was determined. It was shown that it corresponds to the sintering temperature of electrocontact materials with this composition. It is proposed that zinc titanate and oxide be used as arc-suppressing and dispersion-hardening additional additives in copper-based electrocontact materials.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tarasov I. A., Yakovlev I. A., Molokeev M. S., Rautskii M. V., Nemtsev I. V., Varnakov S. N., Ovchinnikov S. G.
Заглавие : Growth of α-FeSi2 nanocrystals on si(100) with Au catalyst
Место публикации : Mater. Lett.: Elsevier, 2016. - Vol. 168. - P.90-94. - ISSN 0167577X (ISSN), DOI 10.1016/j.matlet.2016.01.033
Примечания : Cited References: 25. - The work was supported by the Program of the President of the Russian Federation for the support of leading scientific schools (Scientific School 2886.2014.2), The Russian Foundation for Basic Research (RFBR) (Grants no. 13-02-01265), State Contract no. 02.G25.31.0043 and State Task no. 16.663.2014К).
Предметные рубрики: EPITAXIAL-GROWTH
LOW-TEMPERATURE
FeSi2
NANOWIRES
Si(111)
FILMS
Si
Ключевые слова (''Своб.индексиров.''): nanomaterials--molecular beam epitaxy--α-fesi2--electrode
Аннотация: Self-organized α-FeSi2 nanocrystals on (100) silicon substrate were synthesized by molecular beam epitaxy with Au catalyst. The microstructure and basic orientation relationship between the silicide nanocrystals and silicon substrate were analyzed in detail. α-FeSi2 nanocrystals appeared to be inclined trapezoid and rectangular nanoplates, polyhedral nanobars and pyramid-like ones, aligned along 011 directions on (100) silicon substrate with the length up to 1.5 μm, width ranging between 80 and 500 nm and thickness from 30 to 170 nm. As has been proposed metallic iron silicide may be used for manufacturing electric contacts on silicon. A current-voltage characteristic of the structure was measured at room temperature and showed good linearity.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Avramov P. V., Fedorov D. G., Sorokin P. B., Chernozatonskii L. A., Ovchinnikov S. G.
Заглавие : Quantum dots embedded into silicon nanowires effectively partition electron confinement
Коллективы :
Место публикации : J. Appl. Phys.: AMER INST PHYSICS, 2008. - Vol. 104, Is. 5. - Ст.54305. - ISSN 0021-8979, DOI 10.1063/1.2973464
Примечания : Cited References: 22. - This work was, in part, partially supported by a Core Research for Evolutional Science and Technology (CREST) grant in the area of high performance computing for multi-scale and multiphysics phenomena from the Japan Science and Technology Agency (JST) as well as by the Russian Fund of Basic Researches (Grant No. 05-02-17443) (L.A.C.). One of the authors (P.V.A.) acknowledges the encouragement of Dr. Keiji Morokuma, Research Leader at Fukui Institute. The geometry of all presented structures was visualized by ChemCraft software. SUP23/SUP L.A.C. acknowledges I. V. Stankevich for help and fruitful discussions. P.B.S. is grateful to the Joint Supercomputer Center of the Russian Academy of Sciences for access to a cluster computer for quantum-chemical calculations.
Предметные рубрики: OPTICAL-PROPERTIES
POROUS SILICON
WIRES
PREDICTION
GROWTH
Ключевые слова (''Своб.индексиров.''): electric currents--electric wire--electronic states--electronic structure--nanostructured materials--nanostructures--nanowires--nonmetals--optical waveguides--plasma confinement--quantum confinement--quantum electronics--semiconducting silicon compounds--silicon--electronic state--band gaps--electron confinements--electronic-structure calculations--embedded structures--quantum confinement effect--quantum dots--semi-empirical methods--silicon nanowires--silicon quantum dots--semiconductor quantum dots
Аннотация: Motivated by the experimental discovery of branched silicon nanowires, we performed theoretical electronic structure calculations of icosahedral silicon quantum dots embedded into pentagonal silicon nanowires. Using the semiempirical method, we studied the quantum confinement effect in the fully optimized embedded structures. It was found that (a) the band gaps of the embedded structures are closely related to the linear sizes of the longest constituting part rather than to the total linear dimension and (b) the discovered atypical quantum confinement with a plateau and a maximum can be attributed to the substantial interactions of near Fermi level electronic states of the quantum dots and nanowire segments. (c) 2008 American Institute of Physics.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sorokin P. B., Avramov P. V., Kvashnin A. G., Kvashnin D. G., Ovchinnikov S. G., Fedorov A. S.
Заглавие : Density functional study of 110 -oriented thin silicon nanowires
Разночтения заглавия :авие SCOPUS: Density functional study of 110 -oriented thin silicon nanowires
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2008. - Vol. 77, Is. 23. - Ст.235417. - ISSN 1098-0121, DOI 10.1103/PhysRevB.77.235417
Примечания : Cited References: 38
Предметные рубрики: ELECTRONIC-PROPERTIES
MOLECULAR-DYNAMICS
BUILDING-BLOCKS
QUANTUM WIRES
GROWTH
Аннотация: The electronic band structure and energetic stability of two types of 110 oriented silicon nanowires terminated by hydrogen atoms are studied using the density functional theory. The nanowires truncated from the bulk silicon with [100] and [111] facets and the pentagonal star-shaped nanowires with [111] facets have the lowest cohesive energies, whereas the hexagonal star-shaped ones are the highest in energy. The star-shaped nanowires have the lowest band gaps with direct and indirect transitions for pentagonal and hexagonal types, respectively. Based on the theoretical results, an interpretation of existing experimental data has been provided.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M.
Заглавие : Computation of current-voltage characteristics of the SNS junctions
Место публикации : Physica C: ELSEVIER SCIENCE BV, 2007. - Vol. 460: 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (JUL 09-14, 2006, Dresden, GERMANY). - P807-808. - ISSN 0921-4534, DOI 10.1016/j.physc.2007.04.078
Примечания : Cited References: 8
Предметные рубрики: WEAK LINKS
Ключевые слова (''Своб.индексиров.''): weak link--andreev scattering--subharmonic gap structure--andreev scattering--subharmonic gap structure--weak link--current voltage characteristics--nanowires--reflection--thermal effects--andreev scattering--microbridges--subharmonic gap structure--weak links--josephson junction devices
Аннотация: Simplified model for current-voltage characteristics of weak links (superconductor - normal metal - superconductor junctions, micro-bridges, superconducting nanowires) is suggested. It is based on approach which considers Andreev reflections as responsible for the transfer of dissipative current through the metallic Josephson junction. The current-voltage characteristics of tin microbridges at different temperatures were computed. (c) 2007 Elsevier B.V. All rights reserved.
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