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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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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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Effect of Heat Treatment on the Stability of Nanosized (Co40Fe40B20)34(SiO2)66/ZnO/In2O3 Multilayers / I. V. Babkina, M. N. Volochaev, O. V. Zhilova [et al.] // Bull. Russ. Acad. Sci. Phys. - 2020. - Vol. 84, Is. 9. - P. 1100-1103, DOI 10.3103/S1062873820090051. - Cited References: 11. - This work was supported by the RF Ministry of Science and Higher Education as part of State Task no. FZGM-2020-0007 . - ISSN 1062-8738
Кл.слова (ненормированные):
After-heat treatment -- Binary alloys -- Film preparation -- II-VI semiconductors -- Ion beams -- Magnetic semiconductors -- Multilayers -- Oxide minerals -- Semiconducting indium compounds -- Semiconducting silicon compounds -- Semiconducting zinc compounds -- Silica -- Silicon -- Sputtering -- Wide band gap semiconductors -- Zinc oxide
Аннотация: An investigation is performed of the thermal stability and phase transformations of thin-film heterogeneous [(Co40Fe40B20)34(SiO2)66/ZnO/In2O3]85 multilayers obtained via ion beam sputtering. The system contains 85 layers, each consisting of a (Co40Fe40B20)34(SiO2)66 composite layer and ZnO and In2O3 semiconductor spacers. The sample structure in the initial state and after heat treatment is studied by means of X-ray diffraction. It is shown that the samples are stable at temperatures of up to 500°С. Zn2SiO4, InBO3, CoFe, and In2O3 phases form during annealing.

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Публикация на русском языке Влияние термообработки на стабильность наноразмерных многослойных структур (Co40Fe40B20)34(SiO2)66/ZnO/In2O3 [Текст] / И. В. Бабкина, М. Н. Волочаев, О. В. Жилова [и др.] // Изв. РАН. Сер. физич. - 2020. - Т. 84 № 9. - С. 1293-1296

Держатели документа:
Voronezh State Technical University, Voronezh, 394026, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Babkina, I. V.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zhilova, O. V.; Kalinin, Y. E.; Kashirin, M. A.; Sitnikov, A. V.; Chehonadskih, M. V.; Yanchenko, L. I.
}
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Effects of modified magnetite nanoparticles on bacterial cells and enzyme reactions / L. S. Bondarenko, E. S. Kovel, K. A. Kydralieva [et al.] // Nanomaterials. - 2020. - Vol. 10, Is. 8. - Ст. 1499. - P. 1-20, DOI 10.3390/nano10081499. - Cited References: 83. - This research was funded by the Russian Foundation for Basic Research (#19-315-50048, #19-33-90149, and #18-29-19003) . - ISSN 2079-4991
Кл.слова (ненормированные):
Magnetite nanoparticles -- Humic acids-coated magnetite nanoparticles -- Silica-coated magnetite nanoparticles -- Zeta potential -- Hydrodynamic diameter -- Toxicity -- Bioluminescence -- Bacterial assay -- Enzymatic assay -- Oxidative stress -- Photobacterium phosphoreum -- NADH:FMN-oxidoreductase -- Luciferase
Аннотация: Current paper presents biological effects of magnetite nanoparticles (MNPs). Analyzing effects of MNP’ characteristics (zeta-potential and hydrodynamic diameters) on bacteria and their enzyme reactions was the main focus. Photobacterium phosphoreum and bacterial enzymatic reactions were chosen as bioassays. Three types of MNPs were under study: bare Fe3O4, Fe3O4 modified with 3-aminopropyltriethoxysilane (Fe3O4/APTES), and humic acids (Fe3O4/HA). Effects of the MNPs were studied at a low concentration range (< 2 mg/L) and attributed to availability and oxidative activity of Fe3+, high negative surface charge, and low hydrodynamic diameter of Fe3O4/HA, as well as higher Fe3+ content in suspensions of Fe3O4/HA. Low-concentration suspensions of bare Fe3O4 provided inhibitory effects in both bacterial and enzymatic bioassays, whereas the MNPs with modified surface (Fe3O4/APTES and Fe3O4/HA) did not affect the enzymatic activity. Under oxidative stress (i.e., in the solutions of model oxidizer, 1,4-benzoquinone), MNPs did not reveal antioxidant activity, moreover, Fe3O4/HA demonstrated additional inhibitory activity. The study contributes to the deeper understanding of a role of humic substances and silica in biogeochemical cycling of iron. Bioluminescence assays, cellular and enzymatic, can serve as convenient tools to evaluate bioavailability of Fe3+ in natural dispersions of iron-containing nanoparticles, e.g., magnetite, ferrihydrite, etc.

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Держатели документа:
Moscow Aviation Institute (National Research University), Moscow, 125993, Russian Federation
Institute of Physics SB RAS, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Biophysics SB RAS, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Problems of Chemical Physics RAS, Moscow Region, Chernogolovka, 142432, Russian Federation
University of Szeged, Szeged, H-6720, Hungary
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Bondarenko, L. S.; Kovel, E. S.; Ковель, Екатерина Сергеевна; Kydralieva, K. A.; Dzhardimalieva, G. I.; Illes, E.; Tombacz, E.; Kicheeva, A. G.; Kudryasheva, N. S.
}
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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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    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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    Kirik, S. D.
    Monitoring MCM-41 synthesis by X-ray mesostructure analysis / S. D. Kirik, V. A. Parfenov, S. M. Zharkov // Micropor. Mesopor. Mater. - 2014. - Vol. 195. - P. 21-30, DOI 10.1016/j.micromeso.2014.04.012. - Cited References: 70. - The investigation was made with financial support of the Program of Presidium RAS (Project 24.37), RF State contracts No 02.740.11.0629, RFBR Grants: 11-03-00610a and 11-03-12161-ofi, RSF 14-13-000025. . - ISSN 1387-1811. - ISSN 1873-3093
   Перевод заглавия: Контроль синтеза МСМ-41 с помощью рентгеновского мезоструктурного анализа

РУБ Chemistry, Applied + Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
ORDERED MESOPOROUS MATERIALS
   ORDERED MESOPOROUS MATERIALS
   IN-SITU
   POWDER DIFFRACTION
   SILICA/SURFACTANT COMPOSITES
   ELECTRON-MICROSCOPY
   MOLECULAR-SIEVES
   STABLE MCM-41
   SILICA
   ADSORPTION
Кл.слова (ненормированные):
Hydrothermal stability -- MCM-41 -- Mesostructure -- TEM -- X-ray diffraction
Аннотация: The electron density maps calculated from X-ray diffraction patterns of the mesoporous silica material MCM-41 present averaged mesostructure images which in contrast to transmission electron microscopy (TEM) images are exceptionally repeating and represent the whole sample. It was shown that the averaged mesostructure parameters such as a unit cell parameter, a pore diameter, a wall width, a pore shape estimated from the X-ray powder diffraction data in combination with the continuous electron density function approach allow monitoring continuous set of the silica framework states at different stages of the material synthesis. The mentioned technique supplemented by N 2-adsorption measurements and transmission electron microscopy was applied for consideration of the MCM-41 hydrothermal stability. Attention has been given to the variations of the synthesis conditions affecting the hydrothermal stability, in particular the maintaining the basicity of the synthesis solution as well the substitution of the synthesis solution with water or a salt solution at hydrothermal treatment. The averaged pore shape was observed to be changed from cylindrical to hexagonal-prismatic form. The observed wall thickness was in the range from 0.75 to 1.25 nm. The competition of silica polycondensation and surface hydrolysis was shown to be responsible for the variety of framework geometry and hydrothermal stability. It has been established that the pore diameter increases generally due to the osmotic pressure of water. If the pores acquire the average prismatic hexagonal shape, the sample has low hydrothermal stability. Under the conditions favorable for the polycondensation the pores have averaged cylindrical shape and material demonstrates higher hydrothermal stability. Cooperative mechanism of mesostructure destruction under hydrothermal conditions was observed using TEM data and was discussed in connection with irregular polycondensation. © 2014 Elsevier Inc. All rights reserved.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Inst Chem & Chem Technol SB RAS, Krasnoyarsk 660036, Russia
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Parfenov, V. A.; Zharkov, S. M.; Жарков, Сергей Михайлович
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Magnetic particles in mesoporous silica MCM-41 / E. A. Denisova, S. V. Komogortsev // V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P176 . - ISBN 978-5-7444-3124-2

Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Li, O. A.; Ли О.А.; Chekanova, L. A.; Чеканова, Лидия Александровна; Patrusheva, T. N.; Патрушева, Тамара Николаевна; Eremin, E. V.; Еремин, Евгений Владимирович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
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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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