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Каталог книг и брошюр библиотеки ИФ СО РАН

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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Loiko V. A., Konkolovich A. V., Miskevich A. A., Krakhalev M. N., Prishchepa O. O., Zyryanov V. Ya.
Заглавие : Small-angle scattering and radiation polarization by a stretched polymer film with nematic liquid crystal droplets having a single-domain structure
Коллективы : Belarusian Republican Foundation for Fundamental Research [F18RA-003]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk krai; Krasnoyarsk Krai Foundation of Science [18-42-243006]
Место публикации : Opt. Spectrosc. - 2020. - Vol. 128, Is. 3. - P.331-338. - ISSN 0030-400X, DOI 10.1134/S0030400X20030121. - ISSN 1562-6911(eISSN)
Примечания : Cited References: 24. - This work was carried out within the framework of the agreement on interacademic collaboration between the National Academy of Sciences of Belarus and Siberian Branch of the Russian Academy of Sciences. It was supported by the Belarusian Republican Foundation for Fundamental Research (project no. F18RA-003). M.N. Krakhalev acknowledges the support of the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, and Krasnoyarsk Krai Foundation of Science (grant no. 18-42-243006).
Предметные рубрики: IONIC MODIFICATION
LIGHT
Аннотация: The coefficient of directed transmittance of a stretched polymer-dispersed liquid crystal film with a defect-free single-domain liquid crystal droplet structure formed by a stretched surfactant-doped film and the polarization degree of forward-transmitted light in the visible and near-infrared spectrum ranges are studied. Results are presented for the 5CB, E7, and E44 nematic liquid crystals. Dependences of the transmission coefficient and polarizing ability of the film on the photodetector field of view are studied. Relationships allowing one to determine film parameters at which the transmission coefficient and polarizing ability of the films simultaneously reach values close to limit ones (0.5 and ±1.0, respectively) are obtained in the Foldy–Twersky and anomalous diffraction approximations.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gardymova, Anna P., Krakhalev M. N., Zyryanov V. Ya.
Заглавие : Optical textures and orientational structures in cholesteric droplets with conical boundary conditions
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [18-72-10036]
Место публикации : Molecules. - 2020. - Vol. 25, Is. 7. - Ст.1740. - ISSN 1420-3049(eISSN), DOI 10.3390/molecules25071740
Примечания : Cited References: 53. - The authors are grateful for the financial support by the Russian Science Foundation (grant No. 18-72-10036).
Предметные рубрики: DISPERSED LIQUID-CRYSTALS
CHIRAL NEMATIC DROPLETS
IONIC MODIFICATION
Аннотация: Cholesteric droplets dispersed in polymer with conical boundary conditions have been studied. The director configurations are identified by the polarising microscopy technique. The axisymmetric twisted axial-bipolar configuration with the surface circular defect at the droplet’s equator is formed at the relative chirality parameter N0≤2.9 . The intermediate director configuration with the deformed circular defect is realised at 2.9N03.95 , and the layer-like structure with the twisted surface defect loop is observed at N0≥3.95 . The cholesteric layers in the layer-like structure are slightly distorted although the cholesteric helix is untwisted.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Rudyak V. Yu., Krakhalev M. N., Gardymova A. P., Prishchepa O. O., Emelyanenko A. V., Zyryanov V. Ya.
Заглавие : Structures, topological defects and optical patterns of cholesteric droplets with homeotropic anchoring
Коллективы : European Conference on Liquid Crystals
Место публикации : 15th Eur. Conf. Liq. Cryst. (ECLC): conf. progr. - 2019. - Ст.PB-31
Примечания : Cited References: 4
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. M.
Заглавие : Structural stability of nematic liquid crystal droplets in the light of the catastrophe theory
Место публикации : Mod. Phys. Lett. B. - 2019. - Vol. 33, Is. 34. - Ст.1950434. - ISSN 0217-9849, DOI 10.1142/S0217984919504347. - ISSN 1793-6640 (eISSN)
Примечания : Cited References: 25. - The work was supported in part by the Siberian Branch of the Russian Academy of Sciences, integration Project No. 356-2018-0058.
Аннотация: Dynamical systems and defects in liquid crystals (LCs) are described using topological methods. Meanwhile, the director field distribution in LC droplets is affected by many bulk and surface factors that are difficult to take into account in the topological analysis. Therefore, the structural instability of a LC droplet formed in a magnetic field has been investigated by us in the framework of the catastrophe theory. The effect of temperature on the control parameters of the cusp catastrophe, which leads to the transition from a bipolar structure with extended poles to the homogeneous or radial configuration, has been estimated. It has been established from the potential curves that the transition is induced by the variation in the LC director orientation between the potential minima related to the LC polymer anchoring energy and magnetic field. The interplay of the cusp catastrophe control parameters and anchoring parameters has been elucidated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. M., Zyryanov V. Ya., Shabanov V. F., Nazarov V. G.
Заглавие : Bipolar-homogeneous structural phase transition in nematic droplets formed in the polymer matrix in a magnetic field
Место публикации : Crystallogr. Rep. - New York: Maik Nauka/Interperiodica/Springer, 2009. - Vol. 54, Is. 7. - С. 1191-1196. - DEC. - ISSN 1063-7745, DOI 10.1134/S1063774509070098
Примечания : Cited Reference Count: 19. - Гранты: This study was supported by the Council on Grants from the President of the Russian Federation for the Support of Leading Scientific Schools ( grant no. NSh-3818.2008.3), the Russian Foundation for Basic Research ( project no. 08-03-01007), the Presidium of the Russian Academy of Sciences ( project no. 27.1), and the Siberian Branch of the Russian Academy of Sciences ( project nos. 110 and 144).Финансирующая организация: President of the Russian Federation [NSh-3818.2008.3]; Russian Foundation for Basic Research [08-03-01007]; Russian Academy of Sciences [27.1, 110, 144]
Предметные рубрики: DISPERSED LIQUID-CRYSTALS
FRANK CONSTANTS
ALIGNMENT
Ключевые слова (''Своб.индексиров.''): bipolar configuration--bipolar structure--cyanobiphenyls--homogeneous structure--mutual transformations--nematic director--nematic droplets--order parameter--poly(vinyl butyral)--structural phase transition--temperature range--thermal fluctuations--crystal structure--drop formation--liquid crystals--magnetic fields--nematic liquid crystals--phase transitions
Аннотация: The phase transition from the bipolar structure to the homogeneous structure in droplets formed from the nematic liquid crystal 4-n-pentyl-4'-cyanobiphenyl in poly(vinyl butyral) in the presence of a magnetic field has been investigated. The phase transition is associated with the expansion of the regions with a tilted orientation of the director in the vicinity of defects (the disappearance of boojums) and with the alignment of the nematic director lines in the bulk of the droplet in the direction of the magnetic field. In the temperature range T = 24-34A degrees C, cyclic mutual transformations between the bipolar configuration of the nematic director and the homogeneous structure, which have a period of similar to 0.5-3.5 s and result from thermal fluctuations of the order parameter, are observed in droplets 3-15 A mu m in size after the forming field is switched off.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krakhalev M. N., Prishchepa O. O., Zyryanov V. Ya.
Заглавие : Inverse mode of ion-surfactant method of director reorientation inside nematic droplets
Место публикации : Mol. Cryst. Liquid Cryst. - 2009. - Vol. 512, Is. 1. - P.1998-2003. - ISSN 1542-1406, DOI 10.1080/15421400903050814
Примечания : Cited Reference Count: 8. - Гранты: This work was partially supported by the grants Nos. NSh-3818.2008.3; 02.740.11.0220, and No. 08-03-01007 of RFBR, and Nos. 27.1; 110; 144 of SB RAS. M. Krakhalev acknowledges the financial support from K. I. Zamaraev MBN Foundation. O. Prishchepa acknowledges the financial support from Russian Science Support Foundation.Финансирующая организация: RFBR [NSh-3818.2008.3, 02.740.11.0220, 08-03-01007]; SB RAS [27.1; 110; 144]; Zamaraev MBN Foundation; Russian Science Support Foundation
Ключевые слова (''Своб.индексиров.''): electrically commanded surfaces--ion surfactant--nematic--polymer dispersed liquid crystals--surface anchoring--electrically commanded surfaces--ion surfactant--nematic--polymer dispersed liquid crystals--surface anchoring--applied voltages--crossed polarizers--director fields--director reorientation--droplet structure--electrically commanded surfaces--high concentration--homeotropic--initial state--ionic modification--liquid-crystal droplets--nematic droplets--nematic polymer--surface-active cations--surface-anchoring--trimethyl--ammonium compounds--cationic surfactants--crystals--drop formation--dyes--ionization of liquids--ions--liquid crystal displays--liquid crystals--liquids--nematic liquid crystals
Аннотация: Inverse mode of a novel electrooptical effect caused by the ionic modification of boundary conditions has been studied for liquid crystal droplets. We have considered the droplets of nematic 5CB doped with cationic surfactant cetyl-trimethyl-ammonium-bromide and dispersed in polyvinyl alcohol. In the initial state the surface anchoring was normal on the whole interface due to the high concentration of homeotropic surfactant. Applied voltage results in the purification of a section of the interface from the surface-active cations thereby restoring here a tangential anchoring and stimulating the significant transformation of droplet structure. At that three different types of director field distribution can be realized within the same droplet. The proper textures of the droplet both in the crossed polarizers and without analyzer are considered.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Loiko V. A., Konkolovich A. V., Miskevich A. A., Zyryanov V. Ya., Maschke U.
Заглавие : Small-angle light scattering by monolayer of liquid crystal droplets in polymer matrix
Место публикации : Atti della Accademia Peloritana dei Pericolanti, Classe di Scienze Fisiche, Matematiche e Naturali. - 2011. - Т. 89, №SUPPL. 1. - ISSN 0365-0359, DOI 10.1478/C1V89S1P059. - ISSN 1825-1242(eissn)
РИНЦ
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Loiko V.A., Zyryanov V.Ya., Konkolovich A.V., Misckevich A.A., Maschke U.
Заглавие : Investigation of small-angle light scattering by monolayer of LC droplets with modified boundary conditions
Коллективы : Topical Meeting on Optics of Liquid Crystals
Место публикации : 14th Topical Meeting on Optics of Liquid Crystals (OLC-2011): Book of abstracts. - 2011
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Rudyak V. Yu., Krakhalev M. N., Sutormin V. S., Prischepa O. O., Zyryanov V. Ya., Emelyanenko A. V.
Заглавие : Orientation structures of nematic liquid crystal in ellipsoidal droplets
Коллективы : European Conference on Liquid Crystals
Место публикации : 15th Eur. Conf. Liq. Cryst. (ECLC): conf. progr. - 2019. - Ст.PB-17
Примечания : Cited References: 4
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Konkolovich A. V., Miskevich A. A., Krakhalev M. N., Prishchepa O. O., Shabanov A. V., Zyryanov V. Ya., Loiko V. A.
Заглавие : Model to describe light scattering by polymer film containing droplets with inhomogeneous anchoring of liquid crystal molecules at the polymer-droplet interface: asymmetry effect in the angular distribution of light
Коллективы : Belarusian Republican Foundation for Fundamental Research [F18RA-003]; Krasnoyarsk Regional Science Foundation [18-42-243006]
Место публикации : Liq. Cryst. - 2019. - Vol. 46, Is. 9. - P.1415-1427. - ISSN 0267-8292, DOI 10.1080/02678292.2019.1573331. - ISSN 1366-5855(eISSN)
Примечания : Cited References: 67. - The work was performed in the framework of an agreement on inter-academic cooperation between the National Academy of Sciences of Belarus and the SB RAS. It is supported by the Belarusian Republican Foundation for Fundamental Research (Project No. F18RA-003). MN Krakhalev thanks the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory and the Krasnoyarsk Regional Science Foundation (grant No. 18-42-243006).
Предметные рубрики: IONIC MODIFICATION
NEMATIC DROPLETS
COHERENT TRANSMITTANCE
Аннотация: A model to describe light scattering by polymer film containing of monolayer of liquid crystal droplets with inhomogeneous anchoring of liquid crystal molecules at the polymer-droplet interface is developed. It is based on the interference approximation of the wave scattering theory. The director field distribution in the droplet volume is determined by solving the free energy density minimization problem using the relaxation method. The spatial distribution of droplets in the layer is described by the hard disks model. The amplitude scattering matrices of individual droplets are found in the anomalous diffraction approximation. The algorithm for numerical analysis of the characteristics of light scattered in a polymer film containing droplets at homogeneous and inhomogeneous surface anchoring is described in terms of the partial filling factors of the monolayer film. Electrically controllable symmetry breaking effect of angular distribution of light scattered by films containing droplets with inhomogeneous anchoring at the polymer-droplet interface is described and experimentally confirmed.
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