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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krakhalev M. N., Sutormin V. S., Prishchepa O. O., Kuz'menok N. M., Mikhalyonok S. G., Bezborodov V. S., Zyryanov V. Ya.
Заглавие : Anionic-cationic surfactant mixture providing the electrically controlled homeotropic surface anchoring of liquid crystals
Коллективы : International conference on Hole Burning, Single Molecule, and Related Spectroscopies: Science and Applications - 2018 , Belarusian Republican Foundation for Fundamental Research [X16P-110]; Russian Foundation for Basic Research (RFBR) [16-53-00073]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-243006]
Место публикации : J. Mol. Liq. - 2019. - Vol. 282: Suzdal Conference (2018, Suzdal, RUSSIA). - P.57-62. - ISSN 0167-7322, DOI 10.1016/j.molliq.2019.02.132. - ISSN 1873-3166(eISSN)
Примечания : Cited References: 30. - The reported study was supported by the Belarusian Republican Foundation for Fundamental Research (project No X16P-110) and Russian Foundation for Basic Research (RFBR) (project No 16-53-00073). Mikhail N. Krakhalev and Vitaly S. Sutormin acknowledge financial support from RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (project No 18-42-243006).
Предметные рубрики: IONIC MODIFICATION
TRANSITION
DROPLETS
CONFIGURATION
LAYER
Аннотация: In search of a substance able to function as an anionic surfactant applied for the electrically-induced anchoring transitions in liquid crystals, the compound 4-heptyloxybenzoate benzyl dodecyldimethylammonium (HOBBDDA) has been synthesized. Its orienting influence on nematic liquid crystal 4-pentyl-4'-cyanobiphenyl (5CB) has been tested. HOBBDDA dissolved up to 1.4%in 50 droplets dispersed in polymer film does not change the tangential surface anchoring inherent to polyvinyl alcohol matrix used. Homeotropic surface anchoring is realized if the HOBBDDA content exceeds 1.7%. The molecules of the surfactant in 5CB dissociate into anions and cations. The anions modify the surface anchoring under the action of DC electric field both in the normal and inverse mode. The mixture of HOBBDDA and cetyltrimethylammonium bromide can function as a binary ionic cationic surfactant which significantly expands the prospects for using the ionic-surfactant method to control liquid crystal materials. (C) 2019 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Deng, Chenkai, Hao, Shiqiang, Liu, Kunjie, Molokeev M. S., Wolverton, Christopher, Fan, Liubing, Zhou, Guojun, Chen, D.a., Zhao, Jing, Liu, Quanlin
Заглавие : Broadband light emitting zero-dimensional antimony and bismuth-based hybrid halides with diverse structures
Коллективы : Beijing Municipal Natural Science FoundationBeijing Natural Science Foundation [2182080]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51972021, 51702329]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [FRF-IDRY-19-005]; RFBRRussian Foundation for Basic Research (RFBR) [19-52-80003]; Department of Energy, Office of Science Basic Energy SciencesUnited States Department of Energy (DOE) [DE-SC0014520]
Место публикации : J. Mater. Chem. C. - 2021. - Vol. 9, Is. 44. - P.15942-15948. - ISSN 2050-7526, DOI 10.1039/d1tc04198c. - ISSN 2050-7534(eISSN)
Примечания : Cited References: 52. - This work was supported by Beijing Municipal Natural Science Foundation (2182080) and the National Natural Science Foundation of China (51972021 and 51702329). The work was partly supported by the Fundamental Research Funds for the Central Universities (FRF-IDRY-19-005) and by the RFBR according to the research project No. 19-52-80003. S. H. and C. W. (DFT calculations) acknowledge support from the Department of Energy, Office of Science Basic Energy Sciences under Grant DE-SC0014520. Access to QUEST, the supercomputing resources facilities at Northwestern University, is also acknowledged
Предметные рубрики: CRYSTAL-STRUCTURE
LONE-PAIR
EMISSION
PEROVSKITES
TIN
LUMINESCENCE
Аннотация: Low-dimensional organic–inorganic metal halides have recently attracted extensive attention because of their various structures and distinguished photoelectric properties. Herein, we report a series of new zero-dimensional organic–inorganic hybrid metal halides: (TMEDA)3Bi2Cl12·H2O, (TMEDA)3Bi2Br12·H2O, (TMEDA)3Sb2Br12·H2O, and (TMEDA)5Sb6Cl28·2H2O [TMEDA = N,N,N′·trimethylethylenediamine]. (TMEDA)3M2X12·H2O (M = Bi or Sb, X = Cl or Br) crystallizes in the monoclinic space group P21/n, and (TMEDA)5Sb6Cl28·2H2O crystallizes in the orthorhombic space group Pnma. (TMEDA)3M2X12 possesses a zero-dimensional structure with the metal halide ions of [MBr6]3− isolated by the organic TMEDA2+ cations. Interestingly, the (TMEDA)5Sb6Cl28·2H2O structure consists of a combination of corner-connected octahedra [Sb4Cl18]6− and edge-shared [Sb2Cl10]4−, which is quite rare. The light emission of all these compounds was measured, and (TMEDA)3Sb2Br12·H2O exhibits the most intense luminescence. Upon 400 nm ultraviolet light excitation, (TMEDA)3Sb2Br12·H2O exhibited strong broadband yellow emission centered at 625 nm with a full-width at half-maximum of ∼150 nm originating from self-trapped excitons. This work suggests the possibility of new types of hybrid halides by introducing different metal centers and probing the structural evolution and photoluminescent properties, serving as a reference for the relationship between structure and luminescent performance and demonstrating their potential use as phosphors in light-emitting diodes.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korshunov M. M.
Заглавие : Effect of gap anisotropy on the spin resonance peak in the superconducting state of iron-based materials
Коллективы : Presidium of RAS Program for the Fundamental Studies [12]; Foundation for the advancement of theoretical physics and mathematics "BASIS"; Gosbudget Program [0356-2017-0030]
Место публикации : Phys. Rev. B. - 2018. - Vol. 98, Is. 10. - Ст.104510. - ISSN 2469-9950, DOI 10.1103/PhysRevB.98.104510. - ISSN 2469-9969(eISSN)
Примечания : Cited References:90. - I would like to thank I. Eremin, S.A. Kuzmichev, and T.E. Kuzmicheva for useful discussions. This work was supported in part by Presidium of RAS Program for the Fundamental Studies No. 12, Gosbudget Program No. 0356-2017-0030, and Foundation for the advancement of theoretical physics and mathematics "BASIS".
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTIVITY
FE-BASED SUPERCONDUCTORS
Аннотация: Spin resonance in the superconducting state of Fe-based materials within the multiorbital model with unequal anisotropic gaps on different Fermi surface sheets is studied. On the basis of the model gap function and the one calculated within the spin fluctuation theory of pairing, I show that the resonance peak shifts to higher frequencies with increasing the zero-amplitude gap magnitude. On the contrary, with increasing the gap anisotropy, it shifts to lower frequencies and loses some intensity.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kuzovnikova L. A., Denisova E. A., Komogortsev S. V., Iskhakov R. S., Nemtsev I. V., Shepeta N. A.
Заглавие : Effect of intensive plastic deformation on structure and magnetic properties of Al2O3/Co(P) nanocomposite particles
Коллективы : Fundamental Bases of Mechanochemical Technologies, International Conference, "Фундаментальные основы механохимических технологий", международная конференция, Институт химии твердого тела и механохимии Сибирского отделения РАН, Новосибирский государственный университет
Место публикации : V International conference "Fundamental bases of mechanochemical technologies". FBMT- 2018: book of abstracts : [25-28 June 2018, Novosibirsk, Russia]. - 2018. - P.141. - ISBN 978-5-4437-0794-5
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kashkina L. V., Stebeleva O. P., Petrakovskaya E. A., Cherepakhin A. V.
Заглавие : Efficiency of high energy impact in synthesis of coal-water suspensions
Коллективы : Carbon: Fundamental Problem, Material Science, Technology - International Conference
Место публикации : Mater. Today: Proc. - 2018. - Vol. 5, Is. 12, Pt. 3. - P.26033-26037. - ISSN 2214-7853, DOI 10.1016/j.matpr.2018.08.024
Примечания : Cited References: 18
Ключевые слова (''Своб.индексиров.''): coal-water slurry--cavitation--nanocarbon--man-made gas emission
Аннотация: A study of thermophysical and ecological properties of highly loaded (50% mass.) coal-water slurry based on Kansk-Achinsk brown coal and distilled water (coal-water slurry fuel – CWSF) with exposure of used water to cavitation-treatment, microwave processing of coal powder, T-900 nanocarbon additions is presented. The study shows that under the conditions of this experiment the thermal physical properties of CWSF are most affected by the use of cavitation-activated water.
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Вид документа : Однотомное издание
Шифр издания :
Заглавие : Euro-asian symposium "Trends in magnetism" (EASTMAG-2004) : Abstract book
Выходные данные : Krasnoyarsk, 2004
Колич.характеристики :418 с
Коллективы : Российская академия наук, Сибирское отделение РАН, Институт физики им. Л.В. Киренского Сибирского отделения РАН, Красноярский государственный университет, Красноярский государственный технический университет, Институт физики металлов Уральского отделения РАН, Научный совет по физике конденсированных сред РАН, Научный совет РАН по физике низких температур, Красноярский научный центр Сибирского отделения РАН, Euro-asian symposium "Trends in magnetism" (2; 2004 ; Aug. 24-27; Krasnoyarsk), "Trends in magnetism", Euro-Asian Symposium (2; 2004 ; Aug. 24-27; Krasnoyarsk)
Примечания : Bibliogr. at the end of the articles - Auth. ind. :
Содержание : Fundamental magnetic properties ; Transport phenomena and spin electronics ; Magnetism and strongly correleted electron systems ; Spin glasses, disordered magnetic systems ; Dynamics of spin systems and magnetic resonances ; Magnetooptics and X-ray magnetooptics ; Magnetic mechanism of the superconductivity ; Domain structure and magnetization processes ; Thin magnetic films and multilayers ; Magnetic particles and nanocrystalline materials ; Molecular magnetism ; Magnetic storage/memory and applications
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kazak N. V., Gavriliuk A. G., Ovchinnikov S. G., Lyubutin I. S., Edel'man I. S., Rudenko V. V.
Заглавие : Evolution of the optical absorption spectra and electronic structure of the VBO3 crystal under high pressures
Коллективы : Russian Foundation for Basic Research [07-02-00490a, 08-02-00897a, 08-02-90708 mob_st, 09-02-00171a, 07-02-00226]; Federal Agency for Science and Innovation [MK-4278.2008.2, 01.164.12.HB11]; Russian Academy of Sciences
Место публикации : J. Exp. Theor. Phys. - 2009. - Vol. 109, Is. 3. - P.455-465. - ISSN 1063-7761, DOI 10.1134/S1063776109090118
Примечания : Cited References: 27. - We would like to thank A. D. Vasil'ev for performing the X-ray diffraction investigations.This study was supported by the Russian Foundation for Basic Research (project nos. 07-02-00490a, 08-02-00897a, 08-02-90708 mob_st, 09-02-00171a, and 07-02-00226), the Federal Agency for Science and Innovation (Rosnauka) (project no. MK-4278.2008.2, contract no. 01.164.12.HB11), and the Branch of Physical Sciences of the Russian Academy of Sciences within the framework of the program "Strongly Correlated Electrons."
Предметные рубрики: BAND-STRUCTURE
PHASE-TRANSITION
FEBO3
FE1-XVXBO3
STATE
MODEL
Ключевые слова (''Своб.индексиров.''): charge-transfer excitations--d-d transitions--ferromagnetic semiconductor--fundamental absorption edge--high pressure--optical absorption spectrum--absorption--boron--boron compounds--electronic properties--electronic structure--optical materials--oxygen--vanadium--light absorption
Аннотация: The evolution of optical absorption spectra of the ferromagnetic semiconductor VBO3 under high pressures up to 70 GPa has been investigated. It has been revealed that, below the fundamental absorption edge (E (g1) = 3.02 eV), the spectra exhibit a series of bands V1 (2.87 eV), V2 (2.45 eV), V3 (1.72 eV), and V4(1.21 eV) due to the d-d transitions in the V3+ ion and charge-transfer excitations. A model of the electronic structure of the VBO3 semiconductor has been constructed. This model combines the one-electron description of the s and p states of boron and oxygen and the many-electron description of the vanadium d states.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Kagan, M. Yu, Aksenov S. V.
Заглавие : Fano effect in Aharonov-Bohm ring with topologically superconducting bridge
Коллективы : RAS Presidium program for fundamental research [32]; Russian Foundation for Basic Research [16-02-00073, 17-02-00135, 18-32-00443]; Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [17-42-240441, 18-42-243017]; Russian Federation [MK-3722.2018.2]; Program of Basic Research of the National Research University Higher School of Economics
Место публикации : J. Phys.: Condens. Matter. - 2019. - Vol. 31, Is. 22. - Ст.225301. - ISSN 0953-8984, DOI 10.1088/1361-648X/ab0b8c. - ISSN 1361-648X(eISSN)
Примечания : Cited References: 69. - The reported study was funded by the RAS Presidium program for fundamental research No. 32 'Nanostructures: physics, chemistry, biology and technology fundamentals', Russian Foundation for Basic Research (projects Nos. 16-02-00073, 17-02-00135, 18-32-00443), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects: 'Majorana bound fermions in the nanomaterials with strong electron correlations and quantum electron transport in the devices containing these materials' (No. 17-42-240441), 'The manifestation of Coulomb interactions and effects of bounded geometry in the properties of topological edge states of nanostructures with spin-orbit interaction' (No. 18-42-243017). SA is grateful to the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, project No. MK-3722.2018.2. MYK thanks the Program of Basic Research of the National Research University Higher School of Economics for support.
Ключевые слова (''Своб.индексиров.''): topological superconductivity--majorana bound state--andreev bound state--aharonov-bohm ring
Аннотация: Taking into account an inner structure of the arms of the Aharonov-Bohm ring (AB ring) we have analyzed the transport features related to the topological phase transition which is induced in a superconducting wire (SC wire) with strong spin-orbit interaction (SOI). The SC wire acts as a bridge connecting the arms. The in-plane magnetic-field dependence of linear-response conductance obtained using the nonequilibrium Green's functions in the tight-binding approximation revealed the Breit-Wigner and Fano resonances (FRs) if the wire is in the nontrivial phase. The effect is explained by the presence of two interacting transport channels in the system. As a result, the FRs are attributed to bound states in continuum (BSCs). The BSC lifetime is determined by both hopping parameters between subsystems and the SC-wire properties. It is established that the FR width and position are extremely sensitive to the type of the lowest-energy excitation in the SC wire, the Majorana or Andreev bound state (MBS or ABS, respectively). Moreover, it is shown that in the specific case of the AB ring, the T-shape geometry, the FR disappears for the transport via the MBS and the conductance is equal to one quantum. It doubles in the local transport regime. On the contrary, in the ABS case the local conductance vanishes. The influence of the mean-field Coulomb interactions and diagonal disorder in the SC wire on the FR is investigated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zeer G. M., Zelenkova E. G., Nikolaeva N. S., Zharkov S. M., Pochekutov S. I., Ledyaeva O. N., Sartpaeva A. B., Mikheev A. A.
Заглавие : Formation of phases and microstructure of ZnO and TiO2 based ceramic
Коллективы : Russian Foundation for Fundamental Research [13-08-01003-a]; Ministry of Education of the Russian Federation
Место публикации : Glass Ceram.: Springer, 2015. - Vol. 72, Is. 7-8. - P.242-245. - ISSN 0361-7610, DOI 10.1007/s10717-015-9765-8. - ISSN 1573-8515(eISSN)
Примечания : Cited References:15. - This work was supported in part by the Russian Foundation for Fundamental Research (Grant No. 13-08-01003-a) and the Ministry of Education of the Russian Federation (as part of scientific research tasked by the state to the Siberian Federal University for 2014).
Предметные рубрики: GLASS ENAMEL COATINGS
NANOWIRES
Ключевые слова (''Своб.индексиров.''): electrocontact materials--metal oxides--zinc titanate--nanopowders--ceramic--microstructure--phase formation
Аннотация: Nanopowders of zinc and titanium oxides were used to obtain samples of Zn2TiO4-ZnO ceramic. Phase formation as well as the microstructure and elemental composition of the phases formed were studied by means of electron microscopy. The density and porosity were calculated, and the sizes of grains and pores in the ceramic were determined. The temperature at the zinc titanate forms was determined. It was shown that it corresponds to the sintering temperature of electrocontact materials with this composition. It is proposed that zinc titanate and oxide be used as arc-suppressing and dispersion-hardening additional additives in copper-based electrocontact materials.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T. G., Shishatskaya E. I., Zhila N. O., Киселев, Евгений Геннадьевич, Mironov P. V., Vasil'ev A. D., Peterson I. V., Sinskey A. J.
Заглавие : Fundamental basis of production and application of biodegradable polyhydroxyalkanoates
Место публикации : J. Sib. Fed. Univ. Biol. - 2012. - Vol. 5, Is. 3. - P.280-299; Журн. СФУ. Сер. "биология"
Ключевые слова (''Своб.индексиров.''): biopolymers--polyhydroxyalkanoates--substrates--synthesis--properties--processing--biomedical applications--биополимеры--полигидроксиалканоаты--субстраты--синтез--свойства--обработка--медико-биологическое применение
Аннотация: Microbial polyhydroxyalkanoates (PHAs) have long been studied due to their potential for replacement of petroleum-based plastic. The study addresses the effect of different conditions of carbon nutrition on synthesis of polyhydroxyalkanoates by the bacterium Ralstonia eutropha. First and foremost, PHAs are carbon storage compounds for many organisms. There are still many aspects of the physiology of PHA accumulation and degradation that are still not understood. Measurements of key P3HBrelated enzyme activities throughout cell growth reveal correlations of acetoacetyl-CoA reductase and synthase enzyme activity maxima with P3HB biosynthesis. The investigation addressed kinetic parameters of growth and accumulation of polyhydroxyalkanoates and gas exchange parameters of the culture of the CO-resistant strain of the hydrogen bacteria Ralstonia eutropha B 5786 cultivated on synthesis gas - a product of gasification of brown coals. The results were compared with those obtained by growing the bacteria on electrolytic hydrogen and it was concluded that synthesis gas can be successfully used to produce PHAs. In experiments with wild-type strain it has been first found that under mixotrophic growth conditions - CO2 + co-substrate (alcanoic acids) - bacteria can synthesize multi-component PHAs, consisting of short- and medium-chain-length monomers with carbon chains containing 4 to 8 atoms. It has been shown that PHA composition is determined by the type of the co-substrate. Fatty acids with odd number of carbons induce bacteria to synthesize multi-component PHAs with 3-hydroxybutyrate, 3-hydroxyvalerate, and 3-hydroxyhexanoate as major monomers and 3-hydroxyheptanoate and 3-hydroxyoctanoate as minor, occasionally occurring, ones. Fatty acids with even number of carbons induce synthesis of not only their respective monomers (3-hydroxyhexanoate and 3-hydroxyoctanoate) but also 3-hydroxyvalerate, making possible synthesis of four-component PHAs, containing 3-hydroxybutyrate and 3-hydroxyhexanoate as major components. A family of short- and medium-chain-length four- and five-component PHAs has been synthesized and their physicochemical and biomedical-properties examined.Полигидроксиалканоаты (ПГА) - перспективные материалы, которые могут заменить пластмассы на углеводородной основе, и они исследуются уже в течение длительного времени. Данная работа рассматривает воздействие различных условий углеродного питания на синтез полигидроксиалканоатов бактериями Ralstonia eutropha. Прежде всего ПГА являются запасными веществами для многих организмов. Многие аспекты физиологии накопления и разрушения ПГА остаются пока не изученными. Измерение активности ключевых ферментов 3ПГБ на протяжении роста клетки показывает связь максимумов активности ацетоацетил-КоА редуктазы и синтазы с биосинтезом 3ПГБ. Были исследованы кинетические параметры роста и накопления полигидроксиалканоатов и параметры газообмена культуры штамма водородных бактерий Ralstonia eutropha B 5786, устойчивого к СО, при культивировании на синтез-газе - продукте газификации бурых углей. Проведено сравнение полученных результатов с данными, полученными при выращивании бактерий на электролитическом водороде, и показано, что синтез-газ может успешно применяться для получения ПГА. В экспериментах с природным штаммом бактерий впервые было показано, что при миксотрофных условиях роста - CO2 + дополнительный субстрат (алкановые кислоты) - бактерии способны синтезировать многокомпонентные ПГА, состоящие из коротко- и среднецепочечных мономеров с длиной цепи от 4 до 8 атомов углерода. Показано, что состав ПГА зависит от типа дополнительного субстрата. Жирные кислоты с нечётным количеством атомов углерода стимулируют бактерии синтезировать многокомпонентные ПГА, состоящие из таких основных компонентов, как 3-гидроксибутират, 3-гидроксивалерат и 3-гидроксигексаноат, и второстепенных, эпизодических компонентов: 3-гидроксигептаноата и 3-гидроксиоктаноата. Жирные кислоты с чётным количеством атомов углерода стимулируют синтез как соответствующих им мономеров (3-гидроксигексаноата и 3-гидроксиоктаноата), так и 3-гидроксивалерата, что позволяет получать четырёхкомпонентные ПГА, содержащие 3-гидроксибутират и 3-гидроксигексаноат в качестве основных компонентов. Было синтезировано семейство коротко- и среднецепочечных четырёх- и пятикомпонентных ПГА и проведено исследование их физико-химических и медико-биологических свойств.
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