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Deich, L. I.
Far-infrared attenuation in glasses / L. I. Deich // Phys. Rev. B. - 1994. - Vol. 49, Is. 1. - P. 109-113, DOI 10.1103/PhysRevB.49.109. - Cited References: 29 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
VITREOUS SILICA
   TEMPERATURE
   MODEL
   LOCALIZATION
   ABSORPTION
   SOLIDS
   STATES
Аннотация: The influence of quasilocal vibrations on the far-infrared spectra of glasses is investigated under the supposition that the quasilocal vibrations are directly inactive in the attenuation. It is shown that taking into account phonon-quasilocal-vibration coupling and both medium- and short-range structure of the inhomogeneities of a photon-phonon coupling parameter can give rise to an attenuation curve similar to one observed for a-SiO2 and related materials.

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Держатели документа:
L. V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Дейч, Лев Исаакович
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Deich, L. I.
Low-frequency raman-scattering in glasses / L. I. Deich // Phys. Rev. B. - 1995. - Vol. 51, Is. 13. - P. 8131-8139, DOI 10.1103/PhysRevB.51.8131. - Cited References: 32 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
AMORPHOUS SOLIDS
   VITREOUS SILICA
   THERMAL-CONDUCTIVITY
   LIGHT-SCATTERING
   TEMPERATURE
   STATES
   MODES
   HEAT

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Дейч, Лев Исаакович
}
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    Новый метод получения ФК-опаловых пленок путем укладки монодисперсных сферических частиц кремнезема в регулярную структуру в среде поверхностно-активного вещества / Д. В. Калинин, В. В. Сердобинцева, В. Ф. Шабанов // Российские нанотехнологии. - 2009. - Т. 4, № 5-6. - С. 94-97 . - ISSN 1992-7223. - ISSN 1993-4068
   Перевод заглавия: new method to obtain fc opal films by stacking of monodispersed spherical silica particles in a regular structure in the medium of the surface active substance

УДК

681.7.066+621.3.049.76+778.38

Аннотация: Разработан принципиально новый метод укладки монодисперсных сферических частиц кремнезема (МСЧК) в монокристаллические опаловые пленки на твердой плоской подложке из лиофильных суспензий МСЧК в диметилсульфоксиде. Метод позволяет получать опаловые пленки высокого оптического качества, не содержащие доменов, двойников и имеющие минимум микротрещин, более качественные, чем в методе подвижного мениска, и перспективен для получения пленок на металлических и пластиковых подложках, а также прямого получения гетероструктур.
Fundamentally new technology of MSSP stacking in monocrystalline opal films at solid flat base of lyophilic MSSP suspensions in dimethyl sulfoxide is elaborated. This method makes possible high-quality, domains and twins-free opal films with a minimum of micro cracks than the method of mobile meniscus. It is promising to produce heterostructures and films on metal and plastic base.

РИНЦ
Держатели документа:
Институт геологии и минералогии СО РАН им. В.С. Соболева
Институт физики им. Л.В. Киренского

Доп.точки доступа:
Калинин, Д. В.; Сердобинцева, В. В.; Шабанов, Василий Филиппович; Shabanov, V. F.
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NMR microimaging for studying the initial stages of gelation process in colloidal silica [Text] / E. V. Morozov, O. V. Shabanova [et al.] // Actual problems of magnetic resonance and its application : XII International youth scientific school, Kazan, 5 - 9 October 2009 : program, lecture notes, proceedings : new aspects of magnetic resonance application. - 2009. - P121-125

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Доп.точки доступа:
Morozov, E. V.; Морозов, Евгений Владимирович; Shabanova, O.V.; Pavlov, V.F.; Falaleev, O.V.; Actual problems of magnetic resonance and its application(12 ; 2009 ; Oct. ; 5-9 ; Kazan)
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Dielectric properties of liquid crystals in polycapillary matrices / B. A. Belyaev [et al.] // Phys. Solid State. - 2010. - Vol. 52, Is. 6. - P. 1315-1322, DOI 10.1134/S1063783410060314. - Cited References: 24. - This study was supported by the Council on Grants from the President of the Russian Federation (grant no. 3818.2008.3) and the Siberian Branch of the Russian Academy of Sciences (Integration Project no. 5) and performed within the framework of the State Contract (no. 02.740.11.0220). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MOLECULAR-SIEVES
   SILICA AEROGEL
   POROUS-GLASS
   MEMBRANES
   NMR
   8CB
Аннотация: This paper reports on the results of investigations into the dielectric properties of liquid crystals embedded in polycapillary matrices and describes a technique for their measurement. It has been revealed that the chemical structure of the rigid core and the length of mobile alkyl groups of liquid-crystal molecules of the alkylcyanobiphenyl group substantially affect the equilibrium configuration of the liquid-crystal director in capillaries. The reorientation of liquid-crystal molecules embedded in capillaries in the nematic phase under the influence of an external magnetic field has been investigated.

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Держатели документа:
[Belyaev, B. A.
Drokin, N. A.
Shabanov, V. F.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Kumakhov, M. A.] Inst Xray Opt, Moscow 125315, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Institute of X-Ray Optics, ul. Chasovaya 28, Moscow 125315, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Drokin, N. A.; Дрокин, Николай Александрович; Kumakhov, M. A.; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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State of iron in nanoparticles prepared by impregnation of silica gel and aluminum oxide with FeSO4 solutions / G. A. Bukhtiyarova [et al.] // Phys. Solid State. - 2010. - Vol. 52, Is. 4. - P. 826-837, DOI 10.1134/S1063783410040268. - Cited References: 27. - This study was supported by the Presidium of the Russian Academy of Sciences within the framework of the Program no. 27 "Principles of Basic Research of Nanotechnologies and Nanomaterials," Project no. 46 "Magnetically Ordered Nanoparticles in Catalytic Systems: Synthesis, Evolution, and Physicochemical Properties." . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
THERMAL-DECOMPOSITION
   BETA-FEOOH
   MOSSBAUER
   FERRIHYDRITE
   EPSILON-FE2O3
   FE-2(SO4)(3)
   SULFATE
   FE-57
Аннотация: The state of iron in nanoparticles prepared by impregnating silica gel and aluminum oxide with iron(II) sulfate solutions has been investigated using Mossbauer spectroscopy. It has been revealed that the state of iron depends on the nature of the support. Iron(III) hydroxysulfate and iron(III) oxysulfate nanoparticles are formed on the surface of silica gel, and iron oxide nanoparticles are formed on the surface of aluminum oxide. An increase in the concentration of iron ions or in the size of iron-containing particles leads to hydration of the nanoparticle surface. The calcination of the samples results in the formation of E -Fe2O3 oxide in a strongly disordered or amorphous state in iron-containing particles on the surface of silica gel.

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Держатели документа:
[Bukhtiyarova, G. A.
Mart'yanov, O. N.
Yakushkin, S. S.
Shuvaeva, M. A.] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
[Bayukov, O. A.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent'eva 5, Novosibirsk 630090, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Bukhtiyarova, G. A.; Mart'yanov, O. N.; Yakushkin, S. S.; Shuvaeva, M. A.; Bayukov, O. A.; Баюков, Олег Артемьевич
}
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    FMR and TEM Studies of Co and Ni Nanoparticles Implanted in the SiO2 Matrix / I. S. Edelman [et al.] // Appl. Magn. Reson. - 2011. - Vol. 40, Is. 3. - P363-375, DOI 10.1007/s00723-011-0218-4. - Cited Reference Count: 51. - Гранты: The work was supported in part by the Russian Foundation for Basic Research, grant no. 11-02-00972-a, Ministry of Education and Science of the Russian Federation, Federal Target Program "Scientific and scientific-pedagogical personnel of innovative Russia'', contract no. 02.740.11.0797, and State Program "Development of the Scientific Potential of the Higher Education School'', project no. 2.1.1/6038. S.M. Zharkov acknowledges the financial support of the Russian government contract no. 02.740.11.0568. The electron microscopy investigations were carried out at the Joint Center of the Siberian Federal University. - Финансирующая организация: Russian Foundation for Basic Research [11-02-00972-a]; Ministry of Education and Science of the Russian Federation [02.740.11.0797]; State Program "Development of the Scientific Potential of the Higher Education School'' [2.1.1/6038]; Russian government [02.740.11.0568] . - MAY. - ISSN 0937-9347. - ISSN 1613-7507
Рубрики:
FERROMAGNETIC-RESONANCE
   MAGNETIC-PROPERTIES
   THIN-FILMS
   COBALT NANOPARTICLES
   ION-IMPLANTATION
   FINE PARTICLES
   GRANULAR FILMS
   ANISOTROPY
   POLYIMIDES
   RUTILE
Кл.слова (ненормированные):
energy dispersive x ray spectroscopy -- face-centered cubic structure -- fused silica plates -- g factors -- hexagonal close packing -- high dose -- high-dose implantation -- implantation dose -- implanted samples -- line shape -- magnetic parameters -- matrix -- metal nanoparticles -- ni nanoparticles -- nonsymmetric -- out-of-plane -- room temperature -- spherical shape -- subsurface layer -- tem -- temperature dependence -- thin magnetic films -- uniaxial magnetic anisotropy -- cobalt -- fused silica -- magnetic anisotropy -- nanoparticles -- silica -- silicon compounds -- transmission electron microscopy -- x ray spectroscopy -- ferromagnetic resonance
Аннотация: Fused silica plates have been implanted with 40 keV Co+ or Ni+ ions to high doses in the range of (0.25-1.0) x 10(17) ions/cm(2), and magnetic properties of the implanted samples have been studied with ferromagnetic resonance (FMR) technique supplemented by transmission electron microscopy, electron diffraction and energy dispersive X-ray spectroscopy. The high-dose implantation with 3d-ions results in the formation of cobalt and nickel metal nanoparticles in the irradiated subsurface layer of the SiO2 matrix. Co and Ni nanocrystals with hexagonal close packing and face-centered cubic structures have a spherical shape and the sizes of 4-5 nm (for cobalt) and 6-14 nm (for nickel) in diameter. Room-temperature FMR signals from ensembles of Co and Ni nanoparticles implanted in the SiO2 matrix exhibit an out-of-plane uniaxial magnetic anisotropy that is typical for thin magnetic films. The dose and temperature dependences of FMR spectra have been analyzed using the Kittel formalism, and the effective magnetization and g-factor values have been obtained for Co- and Ni-implanted samples. Nonsymmetric FMR line shapes have been fitted by a sum of two symmetrical curves. The dependences of the magnetic parameters of each curve on the implantation dose and temperature are presented.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Zavoisky Physical-Technical Institute,Russian Academy of Sciences

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Petrov, D. A.; Петров, Дмитрий Анатольевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Khaibullin, R. I.; Nuzhdin, V. I.; Stepanov, A. L.
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Synthesis and characterization of silica supported iron-containing catalyst for the Friedel-VCrafts benzylation of benzene [Text] / Shuvaeva M.Nuzhdin A.Bayukov O. [et al.] // Proceedings of the 2nd European conference of Control, and Proceedings of the 2nd European conference on Mechanical Engineering (ECC'11/ECME'11). - 2011. - P126-131. - Библиогр.: 3 . - ISBN 978-1-61804-057-2
Аннотация: Benzylation of benzene with benzyl chloride was investigated in the temperature range 25-60°C over silica supported Fe-containing catalyst prepared by simple and reproducible method using FeSO4 as precursor. It was shown that the calcination temperature is the main parameter effecting the catalytic activity: the samples, containing 4-6wt% Fe, provide the reaction of benzene with benzyl chloride after calcinations at 400°C. Selectivity does not depend on the reaction temperature as well as iron content and is defined mainly by the ratio of the reactants. The effect of calcination temperature (300-900°C) on the catalytic properties of Fecontaining catalysts is discussed in connection with the evolution of iron species nature in the course of preparation and reaction.

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Доп.точки доступа:
Shuvaeva, M.; Nuzhdin, A.; Bayukov, O.; Martyanov, O.; Bukhtiyarova, G. A.; European conference of Control(2 ; 2011 ; Dec. ; 1012 ; Puerto De La Cruz, Tenerife, Spain); European conference on Mechanical Engineering(2 ; 2011 ; Puerto De La Cruz, Tenerife, Spain)
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Facile synthesis of nanosized е-РегОз particles on the silica support [Текст] / Buktiyarova G.A.Shuvaeva М.А.Bayukov О.A. [и др.] // J. Nanopart. Res. - 2011. - Vol. 13, Is. 10. - Ст. 5527-5534DOI 10.1007/sl 1051-011-0542-5

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Buktiyarova, G.A.; Shuvaeva, М.А.; Bayukov, O. A.; Баюков, Олег Артемьевич; Yakushkin, S.S.; Martyanov, O.N.
}
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10.

    Magnetic properties of few nanometers ɛ-Fe2O3 nanoparticles supported on the silica / S. S. Yakushkin [et al.] // J. Appl. Phys. - 2012. - Vol. 111, Is. 4. - Ст. 44312, DOI 10.1063/1.3686647. - Cited References: 27. - authors thank A. D. Balaev and N. V. Volkov for fruitful discussions and comments. This work was supported by Program of RAS No. 27.46. . - ISSN 0021-8979
Рубрики:
HIGH-TEMPERATURE
   IRON
   STABILIZATION
   OXIDE
   GEL
Аннотация: Magnetic properties of ɛ-Fe2O3nanoparticles supported on silica with the average size of few nanometers, narrow size distribution and no admixture of any other iron oxide polymorphs are investigated. The investigation of the temperature behavior of magnetization within the temperature range from 4.2 to 1000 K revealed the presence of several magnetic subsystems in the species under study. The temperatures’ behavior of the magnetic moment value indicates ferrimagnetic ordering in the ɛ-Fe2O3nanoparticles with a Curie temperature of about 800 K and points to the existence of a significant paramagnetic contribution becoming apparent at low temperatures. According to the electron spin resonance data, the particles possess superparamagnetic behavior at temperature higher ∼120 K. The model of the magnetic structure of monophase system of few nanometers ɛ-Fe2O3nanoparticles supported on silica is proposed.

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Держатели документа:
[Yakushkin, S. S.
Bukhtiyarova, G. A.
Martyanov, O. N.] Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia
[Dubrovskiy, A. A.
Balaev, D. A.
Shaykhutdinov, K. A.] Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Yakushkin, S. S.; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Balaev, A. D.; Балаев, Александр Дмитриевич; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Bukhtiyarova, G. A.; Martyanov, O. N.
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