Библиотека института физики им. Л.В. Киренского СО РАН

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Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolbasov E. N., Buznik V. M., Stankevich K. S., Goreninskii S. I., Ivanov Y. N., Kondrasenko A. A., Gryaznov V. I., Matsulev A. N., Tverdokhlebov S. I.
Заглавие : Composite materials obtained via two-nozzle electrospinning from polycarbonate and vinylidene fluoride/tetrafluoroethylene copolymer
Место публикации : Inorg. Mater.: Appl. Res. - 2018. - Vol. 9, Is. 2. - P.184-191. - ISSN 20751133 (ISSN), DOI 10.1134/S2075113318020065
Примечания : Cited References: 36. - The membranes were prepared and studied by means of scanning electron microscopy and X-ray diffraction at the Tomsk National Research Polytechnic University under financial support of the Russian Science Foundation (project no. 16-13-10239). NMR studies were financially supported by the Russian Foundation for Basic Research (project no. 14-29-10178 ofi_m) and performed at the Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences.
Ключевые слова (''Своб.индексиров.''): electrospinning--two-nozzle electrospinning--nonwoven composite materials--vinylidene fluoride/tetrafluoroethylene copolymer--polycarbonate--fluoropolymers
Аннотация: Nonwoven composite membranes based on polycarbonate (PC) and vinylidene fluoride/tetrafluoroethylene copolymer were obtained via the two-channel electrospinning method with a common collector. Three groups of materials were studied: the first one was a polymer membrane made of a vinylidene fluoride/tetrafluoroethylene copolymer, the second one was a polymer membrane based on PC, and the third one involved a composite polymer membrane. Scanning electron microscopy studies of morphology of the polymeric membranes showed that a composite material with a variable pore area could be obtained, which allows selection of this parameter depending on the purpose. The resulting composite material and its constituents are studied with nuclear magnetic resonance, IR spectroscopy, X-ray diffraction, and differential scanning calorimetry. There are electrically active crystalline phases in the composite membranes. The obtained nonwoven composite membrane formed is presented as a two-phase system without any chemical interactions between the phases. © A.V. Alekseev, D.Yu. Dubov, M.R. Predtechenskiy, 2017 and Pleiades Publishing, Ltd., 2018.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. M., Gunyakov V. A., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Domain structures in nematic liquid crystals on a polycarbonate surface
Место публикации : Int. J. Mol. Sci. - 2013. - Vol. 14, Is. 8. - P.16303-16320. - ISSN 1422-0067, DOI 10.3390/ijms140816303
Ключевые слова (''Своб.индексиров.''): liquid crystal--domain--polymer structure
Аннотация: Alignment of nematic liquid crystals on polycarbonate films obtained with the use of solvents with different solvations is studied. Domain structures occurring during the growth on the polymer surface against the background of the initial thread-like or schlieren texture are demonstrated. It is established by optical methods that the domains are stable formations visualizing the polymer surface structures. In nematic droplets, the temperature-induced transition from the domain structure with two extinction bands to the structure with four bands is observed. This transition is shown to be caused by reorientation of the nematic director in the liquid crystal volume from the planar alignment to the homeotropic state with the pronounced radial configuration of nematic molecules on the surface. The observed textures are compared with different combinations of the volume LC orientations and the radial distribution of the director field and the disclination lines at the polycarbonate surface.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. M., Gunyakov V. A., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Electric and magnetic field-assisted orientational transitions in the ensembles of domains in a nematic liquid crystal on the polymer surface
Коллективы : Russian Foundation for Basic Research [12-03-00816]; Siberian Branch of the Russian Academy of Sciences (SB RAS) [30, 24.29, 24.32]; SB RAS through a Taiwan-SB-RAS joint project
Место публикации : Int. J. Mol. Sci. - 2014. - Vol. 15, Is. 10. - P.17838-17851. - ISSN 1422-0067, DOI 10.3390/ijms151017838
Примечания : Cited References: 21. - This work was partially supported by the Russian Foundation for Basic Research (project No. 12-03-00816), and by the Siberian Branch of the Russian Academy of Sciences (SB RAS) through Grants Nos. 30, 24.29, 24.32, and by SB RAS through a Taiwan-SB-RAS joint project.
Предметные рубрики: FRANK CONSTANTS
INTERFACE
ALIGNMENT
DISCLINATIONS
STABILITY
COATINGS
DIRECTOR
Ключевые слова (''Своб.индексиров.''): liquid crystal--polycarbonate--domain structure--electric field--magnetic field
Аннотация: Using electro- and magneto-optical techniques, we investigated orientational transitions in the ensembles of domains in a nematic liquid crystal on the polycarbonate film surface under the conditions of competing surface forces that favor radial and uniform planar alignment of nematic molecules. Having analyzed field dependences of the intensity of light passed through a sample, we established the threshold character of the orientational effects, plotted the calculated intensity versus magnetic coherence length, and compared the latter with the equilibrium length that characterizes the balance of forces on the polymer surface.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. M., Shabanov V. F., Zyryanov V. Ya.
Заглавие : Light transmission of liquid crystal domains formed by polycarbonate surface
Место публикации : Opt. Mater. Express: Optical Society of America, 2016. - Vol. 6, Is. 9. - P.2841-2846. - ISSN 21593930 (ISSN), DOI 10.1364/OME.6.002841
Примечания : Cited References: 15. - This work was partially supported by the Russian Foundation for Basic Research (projects Nos. 15-02-06924 and 16-53-00073), and by the Siberian Branch of the Russian Academy of Sciences (SB RAS) through Complex Program No. II.2P 0358-2015-0011, 0358-2015-0010.
Ключевые слова (''Своб.индексиров.''): electric fields--electric lines--laser beams--liquid crystals--liquids--nematic liquid crystals--polycarbonates--refractive index--coherence distance--disclination lines--interference oscillations--liquid crystal layers--monochromatic lasers--polarization direction--polymer surfaces--radial orientation--light transmission
Аннотация: We investigate the optical transmission of a monochromatic laser beam passing through an individual domain of a nematic liquid crystal formed by the polycarbonate surface. The domain has the radial orientation structure with a disclination line on the polymer surface, which gradually transforms to "pseudoplanar" alignment at the coherence distance ? from the surface. The dependence of the optical transmittance on an electric field applied to the domain are different at various light polarization directions relative to the disclination lines and, in the absence of an analyzer, are accompanied by interference oscillations. To explain the results obtained, a domain is considered to be a gradient lens with the refractive index variable in the plane perpendicular to the laser beam and the resulting deflecting effect that was collected at the beam path through the liquid crystal layer. © 2016 Optical Society of America.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Chekanova L. A., Denisova E. A., Bukaemskiy A. A., Iskhakov R. S., Mel'nikova S. V.
Заглавие : Macro- and nanoscale magnetic anisotropy of FeNi(P) micropillars in polycarbonate membrane
Место публикации : J. Supercond. Novel Magn. - 2019. - Vol. 32, Is. 4. - P.911–916. - ISSN 15571939 (ISSN) , DOI 10.1007/s10948-018-4772-y
Примечания : Cited References: 56
Ключевые слова (''Своб.индексиров.''): magnetic nanowires--magnetic microwires--magnetic pillars--magnetic anisotropy
Аннотация: Macroscopic and local magnetic anisotropy of the FeNi(P) pillars deposited using electroless plating in the pores of the nuclear track-etched polycarbonate membrane has been studied. The alloy fills the pores and forms a nail-shaped pillar. The macroscopic easy magnetization axis was found to be perpendicular to the membrane plane due to magnetic shape anisotropy. The macroscopic magnetic anisotropy constant decreases with decreasing pillar diameter from 0.4 to 0.1 μm supposedly due to increase of the pillar cap contribution. Approach to magnetic saturation analysis indicates that the order in local easy magnetization axis is localized on a nanoscale. The correlation length of the local easy axis and the local magnetic anisotropy field in (Fe100−xNi x )98P2 pillars of different compositions with diameter of 0.4 μm are studied.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Komogortsev S. V., Denisova E. A., Chekanova L. A., Bukaemskiy A. A., Iskhakov R. S., Mel'nikova S. V., Chizhik M. V.
Заглавие : Magnetic anisotropy of nanocrystalline FeNi(P) columns electroless deposited in polycarbonate membranes
Коллективы : Annual conference on мagnetism and мagnetic мaterials
Место публикации : 58th Annual conference on мagnetism and мagnetic мaterials : abstacts. - 2013. - P.580
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. M., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Self-organized ensembles of nematic domains in magnetic and electric fields
Место публикации : Phys. Rev. E. - 2022. - Vol. 106, Is. 2. - Ст.024703. - ISSN 24700045 (ISSN), DOI 10.1103/PhysRevE.106.024703
Примечания : Cited References: 33
Аннотация: The structural and magneto- and electro-optical properties of a self-organized ensemble of nematic domains formed on a polycarbonate film in the presence of a residual solvent are studied. The film covered one of the plane-parallel glass plates of a liquid crystal cell. The magnetic field stabilizing the planar alignment of the liquid crystal was applied parallel to the cell surfaces and the reorienting electric field, perpendicular to them. The voltage dependences of the intensity of light transmitted through the domain ensemble were obtained at different constant values of the magnetic field. The comparison of the experimental dependences with the dependences calculated using the liquid crystal free-energy minimization procedure has shown good agreement between them. The mutual effect of structural elements of the ensemble and the effects of phase modulation of light are analyzed by comparing the structural, magnetic, and electric coherence lengths.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. M., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Structuring of the surface layer of polycarbonate film upon interaction with nematic liquid crystal
Коллективы : Russian Foundation for Basic Research [15-02-06924, 16-53-00073]
Место публикации : Polym. Sci. Ser. C. - 2018. - Vol. 60, Is. 1. - P.23-31. - ISSN 1811-2382, DOI 10.1134/S181123821801006X. - ISSN 1555-614X(eISSN)
Примечания : Cited References: 24. - This work was partially supported by the Russian Foundation for Basic Research (project nos. 15-02-06924 and 16-53-00073).
Предметные рубрики: TEMPERATURE-DEPENDENCE
MAGNETIC-FIELD
ALIGNMENT
ORIENTATION
Аннотация: The structure formation observed in the surface layer of polycarbonate which proceeds when nematic liquid crystal is deposited on a film is studied. Films prepared from polycarbonate solutions in dichloromethane, chloroform, or pyridine and dried in thermobalance at different temperatures and different drying times are studied. Textures are prepared in the process of domain growth. The effect of the orientation of the disclination lines in a magnetic field and the memory effect of molecular ordering after removal and redeposition of the liquid crystal layer are observed. The process of structure formation is analyzed on the basis of the model of cooperative interaction of liquid crystal molecules with polymer chains taking into account the adsorption mechanism.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Iskhakov R. S., Chekanova L. A., Denisova E. A., Bukaemskiy A.A., Melnikova S.V.
Заглавие : Synthesis and investigation of nanostructured Fe1-xNi x(P) columns deposited into porous polycarbona te matrix
Место публикации : Physics, Chemistry and Application of Nanostructures - Proceedings of the International Conference, NANOMEETING 2009. - 2009. - International Conference on Physics, Chemistry and Application of Nanostructures, NANOMEETING 2009 (26 May 2009 through 29 May 2009, Minsk, ) Conference code: 99438. - С. 264-267. - ISBN 9814280356 (ISBN); 9789814280358 (ISBN)
Ключевые слова (''Своб.индексиров.''): exchange constants--macroscopic anisotropy--morphological characterization--nano-structured fe--nanocrystallines--perpendicular anisotropy--porous polycarbonate membranes--shape anisotropy--magnetic anisotropy--nanostructures--nickel
Аннотация: Ferromagnetic Fe1-xNix(P) (x=24-65 at.%.) columns have been chemically deposited into porous polycarbonate membranes with pore diameters of 0.1-4 J.Im. The morphological characterization by TEM reveals the shape features in synthesized columns. Their magnetic perpendicular anisotropy due to the shape anisotropy of columns was observed. The dependence of macroscopic anisotropy on pore diameter and Ni content is analyzed. Approach to magnetic saturation curves and exchange constant of nanocrystalline fe?.xNix(P) columns deposited into porous pol}\:arbonate matrix are investigated.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Паршин, Александр Михайлович, Баранник, Алексей Владимирович
Заглавие : Оптическое пропускание доменной структуры нематика на поверхности полимера в магнитном поле
Место публикации : Жидк. кристаллы и их практич. использ. - 2020. - Т. 20, Вып. 2. - С. 62-68. - ISSN 1991-3966, DOI 10.18083/LCAppl.2020.2.62; Liq. Cryst. Appl.
Примечания : Библиогр.: 20
Предметные рубрики: LIGHT-SCATTERING
DEFECTS
Аннотация: Исследовано распространение лазерного луча через слой гибридно-упорядоченного нематика с поверхностной линией дисклинации, состоящий из доменов с радиальной конфигурацией нематического директора на пленке поликарбоната. Ориентационная структура в объеме домена трансформируется в планарную одноосную, задаваемую линией дисклинации, либо в гомеотропную под действием магнитного поля. Получена зависимость интенсивности света, прошедшего через слой, от магнитного поля, прикладываемого перпендикулярно поверхности полимера. Оптическое пропускание сопровождалось интерференционными минимумами и максимумами. Представлена модель интерференции света, основанная на двулучепреломлении, учитывающая рассеяние на ориентационно-структурных неоднородностях доменного ансамбля. Из рассмотрения свободной энергии жидкого кристалла и эффектов двулучепреломления выведено аналитическое выражение, устанавливающее зависимость между интенсивностью света и напряженностью магнитного поля, совпадающее с экспериментом.The propagation of a laser beam through a layer of a hybrid ordered nematic on a polycarbonate film is studied. The nematic has a surface disclination line consisting of domains with a radial configuration of the nematic director. The orientational structure in the domain volume can be transformed into a planar uniaxial structure defined by a disclination line or into a homeotropic one under the influence of a magnetic field. The dependence of the light intensity transmitted through the layer on the magnetic field applied perpendicular to the polymer surface is obtained. Optical transmission was accompanied by interference minima and maxima. Light interference model based on birefringence which takes into account scattering by the orientation-structural inhomogeneities of the domain ensemble is presented. Considering the analysis of the liquid crystal free energy and the birefringence effects, an analytical expression is derived. It establishes the relationship between the light intensity and the magnetic field strength, which coincides with the experiment.
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