Труды сотрудников института физики

/ T. G. Volova [et al.] // Polym. Sci. Ser. A. - 2013. - Vol. 55, Is. 7. - P. 427-437, DOI 10.1134/S0965545X13070080. - Cited References: 41 . - 11. - ISSN 0965-545X
   Перевод заглавия: Физико-химические свойства полигидроксиалканоатов с разной химической структуройРУБ Polymer Science

Аннотация: A set of polyhydroxyalkanoates are synthesized, and a comparative study of their physicochemical properties is performed. The molecular masses and polydispersities of polyhydroxyalkanoates are found to be independent of their chemical structures. It is shown that the temperature characteristics and degrees of crystallinity of polyhydroxyalkanoates are affected by the chemical compositions of the monomers and their quantitative contents in the polymers. The incorporation of 4-hydroxybutyrate, 3-hydroxyvalerate, and 3-hydroxyhexanoate units into the chain of poly(3-hydroxybutyrate) decreases its melting point and thermal degradation temperature relative to these parameters of a homogeneous poly(3-hydroxybutyrate) sample (175 +/- 5A degrees C and 275 +/- 5A degrees C, respectively). The higher the content of the second monomer units in the poly(3-hydroxybutirate) chain, the greater the changes. The degrees of crystallinity of polyhydroxyalkanoate copolymers are generally lower than that of poly(3-hydroxybutyrate) (75 +/- 5%). The effect on the ratio of the amorphous and crystalline phases of the copolymer samples becomes more pronounced in the series 3-hydroxy-valerate-3-hydroxyhexanoate-4-hydroxybutyrate. The prepared samples exhibit different properties ranging from rigid thermoplastic materials to engineering elastomers.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Krasnoyarsk 660041, Russia
Siberian State Technol Univ, Krasnoyarsk 660049, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
MIT, Cambridge, MA 02139 USA;

Доп.точки доступа:
Volova, T. G.; Волова, Татьяна Григорьевна; Zhila, N. O.; Жила, Наталья Олеговна; Shishatskaya, E. I.; Шишацкая, Екатерина Игоревна; Mironov, P. V.; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Sukovatyi, A. G.; Суковатый, Алексей Григорьевич; Sinskey, A. J.

/ V. A. Loiko [et al.] // Semiconductor Physics, Quantum Electronics and Optoelectronics. - 2013. - Vol. 16, № 1. - P. 185-189. - This work was performed under the aegis of the Integration Project and supported by the Belarusian Republican Foundation for Fundamental Research, Project No. F12SO-007
Аннотация: A method to analyze coherent transmission coefficients and the small-angle light scattering structure of PDLC layer with homogeneous and inhomogeneous boundary conditions on the droplets surface is discussed. For PDLC films with inhomogeneous boundary conditions at the polymer -- liquid crystal interface, asymmetry of the angular structure of light scattering with respect to the polar angle is revealed. Besides, experimental results on transmittance are presented.

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Держатели документа:
B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Nezalezhnastsi ave., Minsk, 220072 Belarus
L.V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences Krasnoyarsk,660036, Russia

Доп.точки доступа:
Loiko, V. A.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Konkolovich, A. V.; Miskevich, A. A.

/ A. M. Parshin [и др.] // Int. J. Mol. Sci. - 2013. - Vol. 14, Is. 8. - P. 16303-16320, DOI 10.3390/ijms140816303 . - ISSN 1422-0067
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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Доп.точки доступа:
Parshin, A. M.; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович

: Сontributed paper / V. Ya. Zyryanov [et al.] // 12th Eur. Conf. Liq. Cryst. (ECLC-2013). - 2013. - Ст. PI.II

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Доп.точки доступа:
Zyryanov, V.Ya.; Зырянов, Виктор Яковлевич; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Shabanov, V. F.; Шабанов, Василий Филиппович; Lee, W.; European Conference on Liquid Crystals(12 ; 2013 ; Sept. ; 22-27)

/ V. A. Loiko [et al.] // J. Quant. Spectrosc. Radiat. Transf. - 2012. - Vol. 113, Is. 18. - P. 315-322, DOI 10.1016/j.jqsrt.2012.03.026. - Cited References: 28 . - ISSN 0022-4073РУБ Spectroscopy

Аннотация: Light scattering by a monolayer of oriented liquid crystal (LC) droplets in polymer matrix is considered. A method for modeling transmittance and angular distribution of scattered light by a monolayer of LC droplets with cylindrical symmetry of the director configuration is developed. It is based on the anomalous diffraction and interference approximations. The internal structures of nematic LC droplets are calculated on base of the free energy minimization problem solution using the relaxation method. The results for monolayers of spherical LC droplets with homogeneous and inhomogeneous boundary conditions are obtained. It is shown that for monolayers containing droplets with inhomogeneous boundary conditions of the "tangential-normal" type there is an asymmetry of the angular structure of the transmitted light over the polar angle. (c) 2012 Elsevier Ltd. All rights reserved.

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Доп.точки доступа:
Loiko, V. A.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Maschke, U.; Konkolovich, A. V.; Miskevich, A. A.; Conference on Electromagnetic and Light Scattering (13 ; 2011 ; Sept. ; 26-30 ; Taormina, Italy)

/ V. A. Loiko [et al.] // Mol. Cryst. Liquid Cryst. - 2012. - Vol. 561, Is. 1. - P. 194-202, DOI 10.1080/15421406.2012.687237. - Cited References: 24 . - ISSN 1542-1406РУБ Crystallography

Аннотация: A numerical method for modelling transmittance and angular distribution of light scattered by a Polymer Dispersed Liquid Crystal (PDLC) film, containing droplets with inhomogeneous boundary conditions, is proposed. It is based on the anomalous diffraction approximation and an interference approximation. The internal structures of nematic LC droplets are calculated on the basis of the free energy minimization problem solution using the relaxation method. The results for a monolayer of spherical LC droplets with modified boundary conditions caused by the local increase of the concentration of surface-active ions at the polymer-LC interface are discussed.

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Доп.точки доступа:
Loiko, V. A.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Konkolovich, A. V.; Misckevich, A. A.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Maschke, U.; International Topical Meeting: Optics of Liquid Crystals (14th ; Sept 25 - Oct 1, 2011 ; Yerevan, Armenia)

/ N. S. Naumkin [et al.] // Instrum. Exp. Tech. - 2012. - Vol. 55, Is. 2. - P. 294-297, DOI 10.1134/S0020441212010198. - Cited References: 5. - This study was supported by the Center of Collective Use of the Krasnoyarsk Scientific Center (Siberian Branch, Russian Academy of Sciences), the Presidium of the Russian Academy of Sciences (project no. 27.1), the Department of Physical Sciences, Russian Academy of Sciences, (project no. 9.1), and the Siberian Branch, Russian Academy of Sciences (integration project no. 5). . - ISSN 0020-4412РУБ Engineering, Multidisciplinary + Instruments & Instrumentation

Аннотация: A setup and a technique for optical measurements intended for evaluating the content of unbound compounds in an epoxy polymer are described. The principle of operation of the setup is based on measurements of the spectra of absorption of infrared (IR) radiation by condensed products of evaporation of unbound components. The needed mass of a sample is about 0.01 g. The results of measurements of the IR radiation absorption as a function of the concentrations of the mixture components-ED-22 epoxy resin, isomethyltetrahydrophthalic anhydride (hardener), and a cure promoter (N integral D-606/2)-are presented. The relative content of chemically unbound components in the structure of a polymer matrix is evaluated as a function of the hardener concentration, thus allowing determination of the stoichiometric ratio of the initial components of an epoxy mixture. The obtained results are compared to those obtained by the extraction method.

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Держатели документа:
[Naumkin, N. S.
Shestakov, N. P.
Ivanenko, A. A.
Shestakov, A. B.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Shestakov, N. P.
Ivanenko, A. A.] Russian Acad Sci, Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
[Kargin, V. F.] Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660049, Russia

Доп.точки доступа:
Naumkin, N. S.; Shestakov, N. P.; Шестаков, Николай Петрович; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Kargin, V. F.; Shestakov, A. B.

/ A. M. Parshin [et al.] // Mol. Cryst. Liquid Cryst. - 2012. - Vol. 557, Is. 1. - P. 50-59, DOI 10.1080/15421406.2011.632237. - Cited References: 19. - This study was supported by the Presidium of the Russian Academy of Sciences (Project no. 24.1) and the Siberian Branch of the Russian Academy of Sciences (grant no. 43). . - ISSN 1542-1406РУБ Crystallography

Аннотация: The structural transition occurring in droplets of nematic liquid crystals formed in a polymer in magnetic field is studied. The transition is caused by field-driven weakening of tangential surface anchoring and develops following two scenarios: bipolar structure/homogeneous structure or bipolar structure/radial structure. The first scenario suggests a cyclic transition occurring upon thermal fluctuations without field. The structural transition is considered within a model of the biaxial liquid crystal/polymer interface. The model describes tendency of the nematic director to align tangentially on a droplet's surface, normally under the action of flexoelectric polarization, and axially along the magnetic-field-imposed easy orientation axis.

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Держатели документа:
[Parshin, A. M.
Nazarov, V. G.
Zyryanov, V. Ya.
Shabanov, V. F.] Krasnoyarsk Sci Ctr, LV Kirensky Inst Phys, Krasnoyarsk, Russia

Доп.точки доступа:
Parshin, A. M.; Паршин, Александр Михайлович; Nazarov, V. G.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович

/ M. H. Egamov [et al.] // J. Opt. Technol. - 2014. - Vol. 81, Is. 7. - P. 414-417, DOI 10.1364/JOT.81.000414. - Cited References: 17. - This work was carried out with the partial support of Grant 12-03-00816 of the Russian Foundation for Basic Research, Grants 24.32 and 24.29 of the Presidium of the Russian Academy of Sciences, and joint project 30 of the Siberian Section of the Russian Academy of Sciences (SO RAN), and a joint project of the SO RAN and the National Scientific Council of Taiwan. . - ISSN 1070-9762. - ISSN 1091-0786РУБ Optics

Аннотация: The transmittance anisotropy of a composite polymer-liquid-crystal film has been studied as it varies with the degree to which it is elongated. The composite film includes polyvinyl alcohol, the nematic liquid crystal 4-n-pentyl-4'-cyanobiphenyl, and the surfeiting cetyltrimethylammonium bromide, which initiates homeotropic adhesion of the nematic to the surface of the polymer. It is shown that, when the film is uniaxially stretched, the transmittance of the orthogonally polarized component of directly transmitted radiation and accordingly the degree of polarization abruptly increase, reaching saturation when it is stretched to twice its length. Such variation of the film's macroscopic optical properties can be caused by an orientational-structural transition to a homogeneous configuration of the director in deformed droplets of the nematic and makes it possible to substantially improve the optical characteristics of light polarizers based on such composite media. (C) 2014 Optical Society of America.

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Доп.точки доступа:
Egamov, M. H.; Эгамов, Мухтор Хасанович; Gerasimov, V. P.; Герасимов, Виктор Петрович; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Loiko, V. A.; Russian Foundation for Basic Research [12-03-00816]; Presidium of the Russian Academy of Sciences [24.32, 24.29]; Siberian Section of the Russian Academy of Sciences (SO RAN); SO RAN; National Scientific Council of Taiwan

/ T. . Volova [et al.] // J. Biomater. Sci.-Polym. Ed. - 2014. - Vol. 25, Is. 4. - P. 370-393, DOI 10.1080/09205063.2013.862400. - Cited References: 52. - This study was financially supported by Project 'Biotechnologies of novel biomaterials: innovative biopolymers and devices for biomedicine' (Agreement No. 1 of 15.02.2013 to Agreement No. 11.G34.31.0013) in accordance with Resolution No. 220 of the Government of the Russian Federation of April 9, 2010, 'On measures designed to attract leading scientists to the Russian institutions of higher learning' and Grant of the RF President for supporting young Doctors of Sciences No. MD-3112.2012.4. . - ISSN 0920-5063. - ISSN 1568-5624РУБ Engineering, Biomedical + Materials Science, Biomaterials + Polymer Science

Аннотация: IIn this study, electrospinning was used to prepare ultrafine fibers from PHAs with different chemical compositions: P(3HB) and copolymers: P(3HB-co-4HB), P(3HB-co-3HV), and P(3HB-co-3HHx). The main process parameters that influence ultrafine fiber diameter and properties (polymer concentration, solution feeding rate, working distance, and applied voltage) have been investigated and their effects evaluated. The study revealed electrospinning parameters for the production of high-quality ultrafine fibers and determined which parameters should be varied to tailor the properties of the products. This study is the first to compare biological and physical-mechanical parameters of PHAs with different chemical compositions as dependent upon the fractions of monomers constituting the polymers and ultrafine fiber orientation. Mechanical strength of aligned ultrafine fibers prepared from different PHAs is higher than that of randomly oriented ones; no significant effect of ultrafine fiber orientation on surface properties has been found. None of the fibrous scaffolds produced by electrospinning from PHAs had any adverse effects on attachment, growth, and viability of NIH 3T3 mouse fibroblast cells, and all of them were found to be suitable for tissue engineering applications.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Krasnoyarsk 660041, Russia
Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, RussiaИФ СО РАН;

Доп.точки доступа:
Volova, T.; Волова, Татьяна Григорьевна; Goncharov, D.; Sukovatyi, A. G.; Суковатый, Алексей Григорьевич; Shabanov, A. V.; Шабанов, Александр Васильевич; Nikolaeva, E.; Shishatskaya, E.; Project 'Biotechnologies of novel biomaterials: innovative biopolymers and devices for biomedicine' [1, 11.G34.31.0013]; Government of the Russian Federation [220]; RF President for supporting young Doctors of Sciences [MD-3112.2012.4]

/ P. C. Wu [et al.] // Opt. Express. - 2014. - Vol. 22, Is. 17. - P. 20278-20283, DOI 10.1364/OE.22.020278. - Cited References: 19. - This work was financially sponsored by the Ministry of Science and Technology, Taiwan, through Grants NSC 101-2112-M-009-018-MY3, 103-2923-M-009-003-MY3 and 102-2811-M-009-060. V. Ya. Zyryanov would like to thank the Siberian Branch of the Russian Academy of Sciences (grants Nos. 43, 24.29, 101 and NSC-SB-RAS joint project). . - ISSN 1094-4087РУБ Optics

Аннотация: This paper investigates the spectral properties of a one-dimensional photonic crystal (PC) containing an inhomogeneous polymer- dispersed liquid crystal (PDLC) as a defect layer. Experimental results indicate that the voltage-induced reorientation of LC molecules between the light-scattering and transparent states in the PDLC enables the electrical tuning of the transmittance of defect-mode peaks in the spectrum of the PC/PDLC cell. Specifically, owing to the unique configuration of the spatial distribution of LC droplet sizes in the defect layer, a concept concerning the spatial switching in the wavelength of defect modes is proposed. As a result, the PC/PDLC hybrid cell is suggested as a potential element for realizing an electrically tunable and spatially switchable photonic bandgap device, which is polarizer-free and requires no alignment layers in the fabrication process.

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Держатели документа:
Natl Chiao Tung Univ, Coll Photon, Inst Imaging & Biomed Photon, Tainan 71150, Taiwan
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Wu, Pochang; Yeh, Enrong; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Lee, Wei; Ministry of Science and Technology, Taiwan [NSC 101-2112-M-009-018-MY3, 103-2923-M-009-003-MY3, 102-2811-M-009-060]; Siberian Branch of the Russian Academy of Sciences [43, 24.29, 101]

[Text] / N. N. Golovnev, M. S. Molokeev // Russ. J. Coord. Chem. - 2014. - Vol. 40, Is. 9. - P. 648-652, DOI 10.1134/S1070328414090036. - Cited References: 17. - This work was supported in the framework of the state program of the Ministry of Education and Science of the Russian Federation for research works of the Siberian Federal University in 2014. . - ISSN 1070-3284. - ISSN 1608-3318РУБ Chemistry, Inorganic & Nuclear

Аннотация: Complex [Eu2(HTBA)6(H2O)6] n (I), where H2TBA is 2-thiobarbituric acid C4H4N2O2S, is synthesized. Its structure is determined by X-ray diffraction analysis (CIF file CCDC 987519). The crystals of complex I are monoclinic: a = 14.1033(4) Å, b = 10.0988(4) Å, c = 15.4061(5) Å, β = 110.003(1)°, V = 2061.9(1) Å3, space group P2/n, Z = 2. All three independent ligands HTBA− are coordinated to Eu3+ through oxygen atoms. Six HTBA− ions (two terminal and four bridging) and two water molecules are coordinated to one of the independent Eu3+ ions. The second Eu3+ ion is bound to four bridging HTBA− ions and four water molecules. The coordination polyhedra are square antiprisms. The bridging HTBA− ions join the antiprisms into layers. The structure is stabilized by numerous hydrogen bonds and the π-π interaction between HTBA−.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk, Russia
Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Molokeev, M. S.; Молокеев, Максим Сергеевич; Головнёв, Николай Николаевич; Ministry of Education and Science of the Russian Federation

/ А. Н. Бояндин [и др.] // Журн. СФУ. Сер. "Биология". - 2014. - Т. 7, № 2. - С. 174-185 ; J. Sib. Fed. Univ. Biol.
   Перевод заглавия: Obtaining and investigation of polymer compositions based on poly-3-hydroxybutyrate
Аннотация: Изучены морфология, поверхностные свойства и биосовместимость пленок, полученных из смесей поли-3-гидроксибутирата с поли-ε-капролактоном, поли-DL-лактидом, полиэтиленгликолем и крахмалом. С использованием электронной микроскопии выявлены различия микроструктуры поверхности пленок: у композитов П(3ГБ) с ПЭГ и ПКЛ формируется более крупнопористая поверхность по сравнению с чистым П(3ГБ). Добавление ПЭГ приводило к существенному возрастанию гидрофильности поверхности. В культуре фибробластов мыши NIH 3T3 отмечено отсутствие цитотоксического действия, наличие адгезии и пролиферации клеток. Таким образом, показана биосовместимость исследованных композитов и их пригодность для получения полимерных изделий для клеточных технологий.
The morphology, surface properties and biocompatibility of mixtures of poly-3-hydroxybutyrate with poly-ε-caprolactone, poly-DL-lactide, polyethylene glycol and starch were studied. Differences in the Ÿlm surface microstructure were revealed using electron microscopy: composites of P(3HB) with PEG and PCL had a more coarse-pored surface compared to the pure P(3HB). Addition of PEG led to a signiŸcant increase in surface hydrophilicity. In the culture of mouse NIH 3T3 Ÿbroblasts the following effects were observed: the absence of cytotoxic effect, the presence of cell adhesion and proliferation. Thus, the biocompatibility of the studied composites and their suitability for production of polymer products for cellular technologies was shown.

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

Доп.точки доступа:
Бояндин, А. Н.; Николаева, Е. Д.; Шабанов, Александр Васильевич; Shabanov, A. V.; Васильев, Александр Дмитриевич; Vasiliev, A. D.

/ A. M. Parshin [et al.] // Int. J. Mol. Sci. - 2014. - Vol. 15, Is. 10. - P. 17838-17851, DOI 10.3390/ijms151017838. - 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. . - ISSN 1422-0067РУБ Chemistry, Multidisciplinary

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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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Dept Energy, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Parshin, A. M.; Паршин, Александр Михайлович; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович; 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

/ A. M. Parshin, V. Y. Zyryanov, V. F. Shabanov // Liq. Cryst. - 2015. - Vol. 42, Is. 1. - P. 57-64, DOI 10.1080/02678292.2014.960904. - Cited References:18. - This work was partially supported by the Russian Foundation for BasicResearch [project No. 12-03-00816] and by the Siberian Branch of theRussian Academy of Sciences (SB RAS) [grants nos. 30, 24.29, 24.32] andby SB RAS through a Taiwan-SB RAS joint project. . - ISSN 0267. - ISSN 1366-5855
   Перевод заглавия: Распределение поля директора с сильно фиксированным упорядочением в нематических структурах на поверхности полимераРУБ Chemistry, Multidisciplinary + Crystallography + Materials Science,

Аннотация: We investigate orientational nematic liquid crystal structures that form at the polymer surface due to adsorption, their stability against the schlieren texture and features of point and linear singularities in them. We demonstrate that surface disclination lines, which also occur due to molecular adsorption, can lead to azimuthal anchoring of a bulk layer and make the singularities with the charge m=+/- 1 stable. We consider the director field distribution in a nematic layer as a result of the combination of two aligning factors, which are the linear disclination that tend to impose uniform planar ordering and point defects that impart the radial configuration to the director. With the use of the calculation, we analyse the energies of elastic distortions of the director field for the radial-planar, radial-homeotropic and radial-radial configurations, depending on the nematic layer thickness.

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Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Dept Energy, Krasnoyarsk, Russia.

Доп.точки доступа:
Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович; Паршин, Александр Михайлович; Russian Foundation for Basic Research [12-03-00816]; Siberian Branch ofthe Russian Academy of Sciences (SB RAS) [30, 24.29, 24.32]; SB RASthrough a Taiwan-SB RAS joint project

/ V. A. Loiko [et al.] // Актуальные проблемы физики твердого тела (ФТТ-2013) : сб. докл. в 3 т. - Минск : Ковчег, 2013. - Т. 2. - P222-224 . - ISBN ISBN 978-985-7055-81-4

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Доп.точки доступа:
Loiko, V. A.; Лойко В. А.; Konkolovich, A. V.; Конколович А. В. ; Miskevich, A. A.; Мискевич А. А.; Maschke, U.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Национальная Академия наук Беларуси; Научно-практический центр по материаловедению НАН Беларуси (Институт физики твердого тела и полупроводников); Актуальные проблемы физики твердого тела, международная научная конференция(2013 ; 15-18 окт. ; Минск, Беларусь)

/ А. М. Паршин, В. Я. Зырянов, В. Ф. Шабанов // Жидк. кристаллы. и их практич. использ. - 2013. - Вып. 2. - С. 26-36. - Работа выполнена при частичной финансовой поддержке за счет проектов № 24.29 и № 24.32 Президиума РАН, № 30 СО РАН-НАНБ, РФФИ № 12-03-00816 и Министерства образования и науки № 14.B37.21.0730 . - ISSN 1991-3966
   Перевод заглавия: Orientational transitions in electric or magnetic field in two-layer nematic structures induced by polymer surface
Аннотация: Экспериментально исследованы двухслойные структуры нематического жидкого кристалла в ячейках с ограничивающими поверхностями поликарбоната при ориентационных переходах из планарно- и гомеотропно-доменных конфигураций в однородное гомеотропное состояние. Переориентация директора осуществлялась с помощью электрического или магнитного полей. Упорядочение жидкого кристалла в двухслойной структуре описано с использованием эффективного параметра порядка. Проведено сопоставление с моделью, следующей из теории упругости жидких кристаллов.
Two-layer structures of a nematic liquid crystal were experimentally studied in cells with interfacial polycarbonate surfaces under orientational transitions from planar- and homeotropicdomain configurations to the homogeneous homeotropic state. Director reorientation was initiated by electric or magnetic fields. The effective order parameter was used to describe the liquid crystal alignment in two-layer structure. Comparison with a model based on the elasticity theory of liquid crystals was carried out.

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

Доп.точки доступа:
Паршин, Александр Михайлович; Parshin A.M.; Гуняков, Владимир Алексеевич; Gunyakov, V. A.; Зырянов, Виктор Яковлевич; Zyryanov V. Ya.; Шабанов, Василий Филиппович

/ V. A. Loiko [et al.] // 15th Electromag. and Light Scattering Conf. (ELS-XV) : book of abstr. - 2015. - P. 139

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Доп.точки доступа:
Loiko, V. A.; Лойко В. А.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Egamov, M. H.; Эгамов, Мухтор Хасанович; Gerasimov, V. P.; Герасимов, Виктор Петрович; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Electromagnetic and Light Scattering Conference(15 ; 2015 ; Jun. ; 21-26 ; Leipzig, Germany)

/ М. А. Коршунов, А. В. Шабанов, В. Я. Зырянов // Физич. мезомеханика. - 2015. - Т. 18, № 1. - С. 90-95. - Библиогр.: 22. - Работа выполнена частично при поддержке РФФИ (проект № 15-02-06924) и программы Президиума РАН (проекты №№ 24.29, 24.32) . - ISSN 1683-805X
   Перевод заглавия: Molecular dynamics study of smectic C*4-decyloxybenzylidene 4’-amino 2-methyl butyl cinnamate in a polymer matrix under applied electric field
Аннотация: Методом молекулярной динамики исследовано распределение молекул сегнетоэлектрического смектического жидкого кристалла 4-децилоксибензилиден-4''-амино-2-метилбутилциннамата в нанокапсуле с фиксированным приграничным слоем при воздействии внешнего электрического поля. Получена температурная зависимость параметра порядка (P 2) как при наличии внешнего электрического поля, так и без него. Вычислена температура перехода из смектической фазы С* в смектическую фазу A в капсуле при наличии поля. Обсуждается изменение распределения молекул и их конформации при воздействии поля.
A molecular dynamics method is used to study the distribution of molecules of a ferroelectric smectic liquid crystal 4-decyloxybenzylidene 4''-amino 2-methyl butyl cinnamate in a nanocapsule with a fixed near-boundary layer under an externally applied electric field. The temperature dependence of the order parameter is obtained both in the presence and in the absence of the external electric field. The temperature of the smectic-C* to smectic-A phase transition in the capsule in the presence of the electric field is calculated. The variation of molecule distribution and molecule conformation under an applied electric filed is discussed.

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Держатели документа:
КНЦ СО РАН
ИФ СО РАН

Доп.точки доступа:
Шабанов, Александр Васильевич; Shabanov, A. V.; Зырянов, Виктор Яковлевич; Zyryanov, V. Ya.; Korshunov, M. A.

/ M. M. Simunin [et al.] // Tech. Phys. Lett. - 2015. - Vol. 41, Is. 11. - P. 1047-1050, DOI 10.1134/S1063785015110103. - Cited References:20. - This work was supported financially by the Russian Science Foundation, project no. 15-19-10017 . - ISSN 1063-7850. - ISSN 1090-6533РУБ Physics, Applied

Аннотация: A structure based on porous anodic alumina with through pores is synthesized. This structure may be of some interest in terms of fabricating electrically switchable membranes. Conducting tubulenes connected to a common input electrode are located in the pores of the structure. It is hypothesized that enhancement of the electric field nonuniformity associated with the indicated structure morphology should help raise the degree of ionic selectivity of the membrane and broaden the range of permissible concentrations of ions in the processed solution. An suggestion regarding the structure of synthesized tubulenes in the context of the problem of suppressing the physical sorption of ions on the pore surface and raising the hydrogen and oxygen reduction potentials relative to those of state-of-the-art field-switchable membranes is also made.

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Держатели документа:
Natl Res Univ Elect Technol MIET, Moscow 124498, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Inst Computat Modeling, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Simunin, M. M.; Khartov, S. V.; Shiverskii, A. V.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Fadeev, Yu. V.; Voronin, A. S.; Russian Science Foundation [15-19-10017]