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    Киселев, Евгений Геннадьевич.
    Синтез и характеристики многокомпонентных ПГА / Е. Г. Киселев, А. Д. Васильев, Т. Г. Волова // Журн. СФУ. Биология. - 2021. - Т. 14, № 1. - С. 97-113 ; J. Sib. Fed. Univ. Biol., DOI 10.17516/1997-1389-0325. - Библиогр.: 32. - Работа выполнена по гранту No 19-43-240012 «Биологические и физические принципы получения биоматериалов новой генерации» при поддержке РФФИ и ККФН и госзаданию Министерства науки и высшего образования РФ No FSRZ-2020-0006. В работе использовано оборудование Центра коллективного пользования приборами ФИЦ «КНЦ СО РАН» . - ISSN 1997-1389. - ISSN 2313-5530
   Перевод заглавия: Synthesis and Characterization of Multicomponent PHAs
Кл.слова (ненормированные):
полигидроксиалканоаты (ПГА) -- биосинтез -- субстраты-предшественники -- сополимеры -- физико-химические свойства -- polyhydroxyalkanoates (PHAs) -- biosynthesis -- precursor substrates -- copolymers -- physicochemical properties
Аннотация: В культуре бактерий Cupriavidus necator B10646 в режиме синтеза резервных полигидроксиалканоатов при включении в состав ростовой среды, помимо основного субстрата, глюкозы, субстратов-предшественников различных мономеров монокарбоновых кислот – солей валериановой и гексановой кислот, пропионата, γ-бутиролактона, синтезировано семейство трех- и четырехкомпонентных полимеров с различным набором и соотношением мономеров и исследованы физико-химические свойства. Трехкомпонентные образцы были образованы мономерами 3-гидроксибутирата (3ГБ), 3-гидроксивалерата (3ГВ), 4-гидроксибутирата (4ГБ) или 3-гидроксигексаноата (3ГГ) и имели следующие составы: П(3ГБ/3ГВ/4ГБ) и П(3ГБ/3ГВ/4ГГ); четырехкомпонентные сополимеры имели состав П(3ГБ/3ГВ/4ГБ/3ГГ). Все сополимерные образцы, независимо от состава и соотношения мономеров, обладали сниженными значениями молекулярной массы и повышенными значениями полидисперсности по сравнению с высококристалличным гомополимером 3-гидроксибутирата, но сохраняли свойства термостабильности, имея разрыв между температурой плавления и термической деградации не менее 100-110 °С. Включение в С-цепь 3ГБ мономеров 3ГВ, 4ГБ и 3ГГ вызывало значительные изменения соотношения кристаллической и аморфной фаз и снижение степени кристалличности (Сх), зависящие от типа мономеров и их содержания в сополимере. Максимальное снижение Сх (до 9-17 %) зарегистрировано у трехкомпонентных образцов П(3ГБ/3ГВ/4ГБ), у четырехкомпонентных сополимеров П(3ГБ/3ГВ/4ГБ/3ГГ) – до 30-36 %. Доказана возможность синтеза полимеров разного, в том числе нового, состава, существенно различающихся базовыми свойствами.
Cupriavidus necator B10646 bacterial cells were cultivated in the mode of synthesis of the reserve polyhydroxyalkanoates (PHAs) in the growth medium that contained, in addition to glucose as the main substrate, precursor substrates of the monomers of various monocarboxylic acids – salts of valeric and hexanoic acids, propionate, and γ-butyrolactone. PHA terpolymers and quaterpolymers with different compositions and proportions of monomers were synthesized, and their physicochemical properties were studied. The terpolymers were composed of monomers of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate (4HB), or 3-hydroxyhexanoate (3HHx) and had the following compositions: P(3HB/3HB/4HHx) and P(3HB/3HV/4HHx). The quaterpolymers had the following composition: P(3HB/3HV/4HB/3HHx). All copolymer samples, regardless of the composition and proportions of monomers, had lower molecular weights and higher polydispersity values compared to the highly crystalline 3-hydroxybutyrate homopolymer, but retained thermal stability properties, with a difference between the melting point and thermal degradation of at least 100-110 °С. The inclusion of 3HV, 4HB, and 3HHx monomers in the C-chain of 3HB caused changes in the crystalline to amorphous phase ratio and a significant decrease in the degree of crystallinity (Cx), which depended on the type of monomers and their contents in the copolymer. The maximum decrease in Cx (9-17 %) was detected in the P(3HB/3HV/4HB) terpolymer and the P(3HB/3HV/4HB/3HHx) quaterpolymer (30-36 %). The study confirms that there is the possibility of synthesizing polymers with various compositions, including new ones, which differ significantly in their basic properties.

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Держатели документа:
Институт биофизики СО РАН ФИЦ «Красноярский научный центр СО РАН», Российская Федерация, Красноярск
Сибирский федеральный университет, Российская Федерация, Красноярск
Институт физики им. Л.В. Киренского ФИЦ «Красноярский научный центр СО РАН», Российская Федерация, Красноярск

Доп.точки доступа:
Васильев, Александр Дмитриевич; Vasiliev, A. D.; Волова, Т. Г.

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    Волочаев, Михаил Николаевич.
    Исследование магнитных композитных пленок Co-ZrO2 и Co-Al2O3, полученных методом твердофазного синтеза / М. Н. Волочаев, В. С. Жигалов, В. Г. Мягков // Решетневские чтения : материалы XIX Междунар. науч. конф. : в 2-х ч. - 2015. - Ч. 1. - С. 504-506. - Библиогр.: 4. - Работа выполнена в рамках договора № 0011872 по программе «У.М.Н.И.К. 15-5». Электронно-микроскопические исследования пленок выполнены на оборудовании ЦКП КНЦ СО РАН . - ISSN 1990-7702
   Перевод заглавия: Solid state synthesis and characterization of Co-ZrO2 and Co-Al2O3 magnetic composite thin films
Кл.слова (ненормированные):
магнитные гранулированные пленки -- твердофазный синтез -- термитные реакции -- magnetic granular thin films -- solid state synthesis -- thermite reactions
Аннотация: Показана возможность синтеза магнитных гранулированных пленок, состоящих из частиц Co, размером порядка 20–100 нм, вложенных в диэлектрическую матрицу. В основе синтеза лежат низкотемпературные термитные реакции в двухслойных системах Co3O4/Zr и Co3O4/Al.
We have synthesized Co-based magnetic granular thin films (Co-particle size of 20-100 nm, surrounded by a dielectric matrix) by low-temperature thermite reactions in Co3O4/Zr and Co3O4/Al bilayer systems.

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Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Жигалов, Виктор Степанович; Zhigalov, V. S.; Мягков, Виктор Григорьевич; Myagkov, V. G.; Volochaev, M. N.; "Решетневские чтения", международная научно-практическая конференция(19 ; 2015 ; нояб. ; 10-14 ; Красноярск)
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    Valleriite-containing ore from Kingash deposit (Siberia, Russia): Mossbauer and X-ray photoelectron spectroscopy characterization, thermal and interfacial properties / Y. L. Mikhlin, M. N. Likhatski, A. S. Romanchenko [et al.] // J. Sib. Fed. Univ. Chem. - 2022. - Vol. 15, Is. 3. - P. 303-317 ; Журн. СФУ. Химия, DOI 10.17516/1998-2836-0294. - Cited References: 25. - This research was funded by the Russian Foundation for Basic Research, Krasnoyarsk Territory Science Foundation and Krasnoyarsk Territory Administration, grant number 20-43-242903. Facilities of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS» were employed in the work . - ISSN 1998-2836
   Перевод заглавия: Валлериитсодержащая руда Кингашского месторождения (Сибирь, Россия): Мессбауэровская и рентгенофотоэлектронная спектроскопия, термические и межфазные свойства
Кл.слова (ненормированные):
valleriite -- ore -- two-dimensional sulfide-hydroxide composite -- SEM -- EDX -- XPS -- Mossbauer spectroscopy -- thermal analysis -- zeta potential -- валлериит -- руда -- двумерный сульфидно-гидроксидный композит -- СЭМ -- ЭРМ -- РФЭС -- мессбауэровская спектроскопия -- термический анализ -- дзета-потенциал
Аннотация: Valleriite, (Cu,Fe)S2×n(Mg,Al,Fe)(OH)2, and related layered minerals are of interest due to their unusual two-dimensional structure, formation mechanisms, physical and chemical properties, and potential involvement into mineral processing and materials science applications. Here, we have studied Kingash Cu-Ni ore samples containing 10-25% of valleriite in association with serpentines (lizardite and chrysotile) and magnetite using scanning electron microscopy and electron microprobe analysis, Mössbauer spectroscopy, X-ray photoelectron spectroscopy (XPS), thermal analysis and zeta potential measurement. The data are compared with those for Al-doped valleriite synthesized via a hydrothermal route. It was found that the Kingash valleriite contains excessive iron relative to CuFeS2 stoichiometry, which mainly occurs, leaving aside magnetite, as Fe3+-OH species in hydroxide layers of valleriite and minor Fe centers in serpentines. Thermal dehydroxylation of hydroxide layers of valleriites occurs near 500oC in inert atmosphere; in air, sulfide sheets oxidize with an exothermal peak at 447oC, and sulfur oxides don't volatilize but react with hydroxide groups of valleriite rather than serpentines. Zeta potential measurements of coarse ore particles using the flow potential technique suggested that the surface of valleriite is negatively charged in a wide pH range while the positive values at low pHs for fine particles are inflicted by serpentine. The findings demonstrate close resemblance of the natural and synthetic Al-doped valleriites, and the key role of valleriite, despite its moderate content, for the interfacial characteristics of the valleriite-bearing ores.
Валлериит, (Cu, Fe)S2×n(Mg, Al, Fe)(OH)2 и родственные ему слоистые минералы представляют интерес в связи с их необычной двумерной структурой, механизмами образования, физическими и химическими свойствами и возможностью применения в процессах переработки полезных ископаемых и материаловедения. В настоящей работе с помощью сканирующей электронной микроскопии и электронного микрозондового анализа, мессбауэровской спектроскопии, рентгеновской фотоэлектронной спектроскопии (РФЭС), термического анализа и измерения дзета-потенциала нами были изучены образцы медно-никелевых руд Кингашского месторождения, содержащие 10–25 % валлериита в ассоциации с серпентинами (лизардит и хризотил) и магнетитом. Было проведено сравнение полученных данных с результатами измерений легированного алюминием валлериита, синтезированного гидротермальным способом. Установлено, что валлериит Кингашского месторождения содержит избыточное железо по отношению к стехиометрии CuFeS2, которое представлено в основном, не считая магнетита, в виде центров Fe3+-OH, расположенных в гидроксидных слоях валлериита и небольшого числа примесей Fe в серпентинах. Термическое дигидроксилирование гидроксидных слоев валлериитов происходит около 500 °C в инертной атмосфере; на воздухе сульфидные слои окисляются с экзотермическим пиком при 447 °C, а оксиды серы не улетучиваются, а реагируют скорее с гидроксидными группами валлериита, чем с серпентинами. Измерения дзета-потенциала крупных частиц руды с использованием метода потенциала протекания показали, что поверхность валлериита отрицательно заряжена в широком диапазоне рН, в то время как положительные показатели при низких значениях рН для более мелких частиц обусловлены присутствием серпентина. Полученные данные демонстрируют близкое сходство природного и синтетического валлериитов, легированного алюминием, и его ключевую роль для межфазных характеристик валлериитсодержащих руд, даже при его умеренном содержании.

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Держатели документа:
Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center of the Siberian Branch, The Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Science Center of the Siberian Branch, The Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Krasnoyarsk Science Center of the Siberian Branch, The Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Mikhlin, Y. L.; Likhatski, M. N.; Romanchenko, A. S.; Vorobyev, S. A.; Tomashevich, Y. V.; Fetisova, O. Yu.; Bayukov, O. A.; Баюков, Олег Артемьевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Nemtsev, I. V.; Karasev, S. V.; Karacharov, A. A.; Borisov, R. V.

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    Valleriite, a natural two-dimensional composite: X-ray absorption, photoelectron, and Mossbauer spectroscopy, and magnetic characterization / Y. L. Mikhlin, M. N. Likhatski, O. A. Bayukov [et al.] // ACS Omega. - 2021. - Vol. 6, Is. 11. - P. 7533-7543, DOI 10.1021/acsomega.0c06052. - Cited References: 92. - This research was supported by the Russian Science Foundation, project 18-17-00135. The authors thank Dr. Y. Laptev for providing valleriite samples, the ESRF for allocating beamtime and the BM23 staff for their help during the experiments. Facilities of the Krasnoyarsk Regional Research Equipment Centre of SB RAS were employed in the work . - ISSN 2470-1343
   Перевод заглавия: Исследование валлерита - природного двумерного соединения: поглощение рентгеновских лучей, фотоэлектронная и Мёссбауровская спектроскопия, магнитные свойства
Аннотация: Valleriite is of interest as a mineral source of basic and precious metals and as an unusual material composed of two-dimensional (2D) Fe-Cu sulfide and magnesium hydroxide layers, whose characteristics are still very poorly understood. Here, the mineral samples of two types with about 50% of valleriites from Noril'sk ore provenance, Russia, were examined using Cu K- and Fe K-edge X-ray absorption fine structure (XAFS) spectroscopy, X-ray photoelectron spectroscopy (XPS), 57Fe Mossbauer spectroscopy, and magnetic measurements. The Cu K X-ray absorption near-edge structures (XANES) spectra resemble those of chalcopyrite, however, with a higher electron density at Cu+ centers and essentially differ from those of bornite Cu5FeS4; the Fe K-edge was less informative because of accompanying oxidized Fe-containing phases. The post-edge XANES and extended XAFS (EXAFS) analysis reveal differences in the bond lengths, e.g., additional metal-metal distances in valleriites as compared with chalcopyrite. The XPS spectra confirmed the Cu+ and Fe3+ state in the sulfide sheets and suggest that they are in electron equilibrium with (Mg, Al) hydroxide layers. Mossbauer spectra measured at room temperature comprise central doublets of paramagnetic Fe3+, which decreased at 78 K and almost disappeared at 4.2 K, producing a series of hyperfine Zeeman sextets due to internal magnetic fields arising in valleriites. Magnetic measurements do not reveal antiferromagnetic transitions known for bornite. The specific structure and properties of valleriite are discussed in particular as a platform for composites of the 2D transition metal sulfide and hydroxide (mono)layers stacked by the electrical charges, promising for a variety of applications.

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Держатели документа:
Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, The Siberian Branch, The Russian Academy of Sciences, Akademgorodok, 50/24, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Science Center, The Siberian Branch, The Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, 31, Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russian Federation
Siberian Federal University, Svobodny pr. 79, Krasnoyarsk, 660041, Russian Federation
European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, Grenoble, F-38042, France

Доп.точки доступа:
Mikhlin, Y. L.; Likhatski, M. N.; Bayukov, O. A.; Баюков, Олег Артемьевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Tomashevich, Y. V.; Romanchenko, A. S.; Vorobyev, S. A.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Meira, D. M.
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Ultrashort pulses characterization by nonlinear diffraction from virtual beam / A. S. Aleksandrovsky [et al.] // Appl. Phys. Lett. - 2011. - Vol. 98, Is. 6. - Ст. 61104, DOI 10.1063/1.3554370. - Cited References: 14. - The work was supported by Ministry of Education and Science of Russian Federation (Contract No. 16.740.11.0150); Grant of President of Russian Federation for support of leading scientific schools Grant No. SS-4645.2010.2; Grant No. RNP.2.1.1.3455 and Projects 2.5.2 and 3.9.1 of PSB RAS; and Projects Nos. 27.1 and 5 of SB RAS. A. M. Vyunishev is grateful for support from Carl Zeiss Grant and from Krasnoyarsk Regional Fund of Science and Technical Activity Support. . - ISSN 0003-6951

РУБ Physics, Applied
Рубрики:
CRYSTAL
SRB4O7
Кл.слова (ненормированные):
Broad spectral -- Frequency-doubling -- Noncollinear -- Nonlinear diffraction -- Nonlinear photonic crystals -- Short-wavelength -- Tetraborate -- Ultrafast diagnostics -- Diffraction -- Light propagation -- Strontium -- Ultrashort pulses -- Photonic crystals
Аннотация: Noncollinear frequency doubling in a random nonlinear photonic crystal of strontium tetraborate via nonlinear diffraction from virtual beam is investigated. This effect is shown to be useful for ultrashort pulses characterization in broad spectral range. Nonlinear photonic crystals of strontium tetraborate are a promising medium for ultrafast diagnostics in short-wavelength applications. (C) 2011 American Institute of Physics. [doi:10.1063/1.3554370]

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Держатели документа:
[Aleksandrovsky, A. S.
Vyunishev, A. M.
Zaitsev, A. I.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Aleksandrovsky, A. S.
Vyunishev, A. M.
Zaitsev, A. I.
Ikonnikov, A. A.
Pospelov, G. I.] Siberian Fed Univ, Krasnoyarsk 660079, Russia
ИФ СО РАН
L. V. Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, 660079 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев, Александр Иванович; Ikonnikov, A. A.; Pospelov, G. I.
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    Two novel mixed-ligand Ni(II) and Co(II) complexes with 1,10-phenanthroline: Synthesis, structural characterization, and thermal stability / N. N. Golovnev [et al.] // Chem. Phys. Lett. - 2018. - Vol. 708. - P. 11-16, DOI 10.1016/j.cplett.2018.07.058. - Cited References: 29. - The study was carried out within the public task of the Ministry of Education and Science of the Russian Federation to the Siberian Federal University (4.7666.2017/BP) in 2017-2019. X-ray data from single crystals were obtained with use the analytical equipment of Baikal Center of collective use of SB RAS and with use the analytical equipment of Krasnoyarsk Center of collective use of SB RAS. . - ISSN 0009-2614
   Перевод заглавия: Два новых комплекса смешанных лигандов Ni (II) и Co (II) с 1,10-фенантролином: синтез, структурная характеризация и термическая стабильность
Кл.слова (ненормированные):
Barbituric acid -- 1,10-Phenanthroline complexes -- X-ray diffraction -- Thermal decomposition -- Infrared spectroscopy
Аннотация: Two nickel(II) and cobalt(II) complexes with phenanthroline, [Ni(Phen)(H2O)3Br]Br (1) and [Co(Phen)2(H2O)2](Hba)2·2H2O (2), Phen = 1,10-phenanthroline and Hba− = barbiturate anion, were synthesized and characterized by powder XRD, TGA and FT-IR. Their structures were determined by single crystal X-ray diffraction techniques. The Ni2+ ion is coordinated by two N atoms of Phen molecule, Br− ion and three H2O molecules forming an octahedron. Uncoordinated and coordinated Br− ions are connected with water molecules by OH⋯Br intermolecular hydrogen bonds with the formation of a 2D plane network which is extended into a 3D network by π−π stacking interactions. The [Co(Phen)2(H2O)2]2+ cation contains a six-coordinated cobalt atom chelated by two Phen ligands and two aqua ligands in the cis arrangement. NH⋯O, OH⋯O and CH⋯O intermolecular hydrogen bonds form a 3D net. NH⋯O hydrogen bonds form the infinite chains of Hba–. In addition, coordinated Phen molecules and lattice water molecules are linked via CH⋯OW hydrogen bonds to form infinite zigzag chains. These different chains are connected by OWH⋯O hydrogen bonds. π−π interaction plays an important role in the stabilization of structures 1–2. FT-IR, TGA, the diffuse reflectance, and UV–Vis spectra were also used to characterize these compounds.

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Siberian Federal University, 79 Svobodny Ave., Krasnoyarsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, bld. 38 Akademgorodok 50, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, 47 Seryshev Str., Khabarovsk, Russian Federation
Favorsky Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky, Irkutsk, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Sterkhova, I. V.; Lesnikov, M. K.
}
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    Tuning the peak effect in the Y1−xNdxBa2Cu3O7−δ compound / D. M. Gokhfeld [et al.] // Ceram. Int. - 2017. - Vol. 43, Is. 13. - P. 9985-9991, DOI 10.1016/j.ceramint.2017.05.011. - Cited References: 37. - This work was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project no. 16-48-243018 and the Russian Foundation for Basic Research, project no. 16-38-00400. . - ISSN 0272-8842
   Перевод заглавия: Управление пик-эффектом в соединении Y1−xNdxBa2Cu3O7−δ
Кл.слова (ненормированные):
Peak effect -- Bulk superconductors -- Critical current -- Pinning -- Characterization -- YBCO
Аннотация: Polycrystalline Y1−xNdxBa2Cu3O7−δ (x=0.02, 0.11, and 0.25) superconductors are synthesized. Nd atoms are uniformly distributed over grains. The magnetization loops of the samples have a pronounced second peak in a wide temperature range. The magnetization data are analyzed using the extended critical state model. It is found that the order-disorder transition of the vortex lattice is affected by doping with neodymium and temperature; the second-peak field and width decrease monotonically with increasing x value. The undoped polycrystalline YBa2Cu3O7−δ compound is assumed to exhibit the peak effect in higher magnetic fields.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Balaev, D. A.; Балаев, Дмитрий Александрович; Yakimov, I. S.; Petrov, M. I.; Петров, Михаил Иванович; Semenov, S. V.; Семёнов, Сергей Васильевич
}
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Time-resolved ellipsometric characterization of (Fe/Si)n multilayer film synthesis / I. A. Tarasov [et al.] // 8th Workshop Ellipsometry : Book of abstracts. - 2014. - P. 81

Материалы конференции

Доп.точки доступа:
Tarasov, I. A.; Тарасов, Иван Анатольевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Zharkov, S. M.; Жарков, Сергей Михайлович; Kosyrev, N. N.; Косырев, Николай Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Leibniz-Institut für Polymerforschung Dresden e. V.; Workshop Ellipsometry (8 ; 2014 ; March 10-12 ; Dresden, Germany)
}
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Time-resolved ellipsometric characterization of (Fe/Si)n multilayer film synthesis / I. A. Tarasov [и др.] // Donostia Int. Conf. on Nanoscaled Magnetism and Applications : Abstracts book. - 2013. - Ст. P1-27. - P. 260

Материалы конференции

Доп.точки доступа:
Tarasov, I. A.; Тарасов, Иван Анатольевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Zharkov, S. M.; Жарков, Сергей Михайлович; Kosyrev, N. N.; Косырев, Николай Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Donostia International Conference on Nanoscaled Magnetism and Applications (9 -13 Sept. 2013 ; San Sebastian, Spain)
}
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10.

    Thermite synthesis and characterization of Co-ZrO2 ferromagnetic nanocomposite thin films / V. G. Myagkov [et al.] // J. Alloys Compd. - 2016. - Vol. 665. - P. 197-203, DOI 10.1016/j.jallcom.2015.12.257. - Cited References: 56. - This study was partially supported by the Russian Foundation for Basic Research (grants ##15-02-00948, 14-03-00515), by the Council for Grants of the President of the Russian Federation (SP-317.2015.1), and by the program of the Foundation for Assistance to Small Innovative Enterprises in Science and Technology (“UMNIK” program). The TEM studies were carried out using the facilities of Electron Microscopy Laboratory of Siberian Federal University and the Performance Service at Krasnoyarsk Scientific Center. . - ISSN 0925-8388
   Перевод заглавия: Термитный синтез и исследование ферромагнитных нанокомпозитных тонких пленок Co-ZrO2

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
SOLID-STATE SYNTHESIS
   PHASE-FORMATION
   ZrO2
   NANOPARTICLES
   TRANSPORT
   OXIDE
   MICROSTRUCTURE
   NANOTHERMITE
   FABRICATION
   PARTICLES
Кл.слова (ненормированные):
Thermite reactions -- Reactive films -- Ferromagnetic nanocomposite films -- ZrO2
Аннотация: Co-ZrO2 ferromagnetic nanocomposite thin films were successfully synthesized using a new thermite reaction between Zr and Co3O4 in layer geometry. The initial Zr/Co3O4 bilayers were obtained by the deposition of Zr layers onto Co3O4 films at room temperature. The process of mixing at the Zr/Co3O4 interface and synthesis of fine-crystalline Co and amorphous ZrO2 phases started at a temperature above the initiation temperature Tin ∼250 °C which did not depend on the bilayer thickness. For the bilayer thickness more than 300 nm high-temperature fcc-Co and cubic c-ZrO2 (or tetragonal t-ZrO2) phases were formed. For the bilayer thickness less than ∼50 nm stable low-temperature hexagonal hcp-Co and monoclinic m-ZrO2 phases were also present in the reaction product. A partial transformation from Co3O4 to CoO occurred after annealing at 300 °C. The secondary reaction between CoO and Zr started soon after Co3O4 had been converted to the CoO phase. After annealing at 500 °C more than 80% of Co was reduced and the final product contained Co nanoparticles above and below the superparamagnetic critical size embedded into a dielectric ZrO2 matrix. The synthesized Co-ZrO2 nanocomposite films possessed soft magnetic behavior, high magnetization and good chemical stability.

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Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Zharkov, S. M.; Жарков, Сергей Михайлович; Matsynin, A. A.; Мацынин, Алексей Александрович; Volochaev, M. N.; Волочаев, Михаил Николаевич; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Bondarenko, G. N.; Бондаренко, Галина Николаевна
}
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11.

The relationship between the structural characteristics of α-Fe2O3 catalysts and their lattice oxygen reactivity regarding hydrogen / N. Kirik, A. Krylov, A. Boronin [et al.] // Materials. - 2023. - Vol. 16, Is. 12 : The 15th Anniversary of Materials — Recent Advances in Catalytic Materials. - Ст. 4466, DOI 10.3390/ma16124466. - Cited References: 63. - This work was conducted within the framework of the budget project for the Institute of Chemistry and Chemical Technology of the Siberian Branch of the Russian Academy of Sciences, Federal Research Center KSC SB RAS, No. FWES–2021–0013 . - ISSN 1996-1944
Кл.слова (ненормированные):
α-Fe2O3 -- catalysts -- calcinations -- XRD -- XPS -- Raman spectroscopy characterization -- temperature-programmed reduction
Аннотация: In this paper, the relationship between the structural features of hematite samples calcined in the interval of 800–1100 °C and their reactivity regarding hydrogen studied in the temperature-programmed reaction (TPR-H2) was studied. The oxygen reactivity of the samples decreases with the increasing calcination temperature. The study of calcined hematite samples used X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), and Raman spectroscopy, and their textural characteristics were studied also. According to XRD results, hematite samples calcined in the temperature range under study are monophase, represented by the α-Fe2O3 phase, in which crystal density increases with increasing calcination temperature. The Raman spectroscopy results also register only the α-Fe2O3 phase; the samples consist of large, well-crystallized particles with smaller particles on their surface, having a significantly lower degree of crystallinity, and their proportion decreases with increasing calcination temperature. XPS results show the α-Fe2O3 surface enriched with Fe2+ ions, whose proportion increases with increasing calcination temperature, which leads to an increase in the lattice oxygen binding energy and a decrease in the α-Fe2O3 reactivity regarding hydrogen.

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Держатели документа:
Federal Research Center “Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences”, Institute of Chemistry and Chemical Technology, 50/24, Akademgorodok, 660036 Krasnoyarsk, Russia
Federal Research Center “Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences”, Kirensky Institute of Physics, 50/38, Akademgorodok, 660036 Krasnoyarsk, Russia
Federal Research Center Boreskov Institute of Catalysis, 5, Ac. Lavrentieva Ave., 630090 Novosibirsk, Russia
Department of Chemistry, 79, Svobodny Ave., Siberian Federal University, 660041 Krasnoyarsk, Russia

Доп.точки доступа:
Kirik, N.; Krylov, A. S.; Крылов, Александр Сергеевич; Boronin, A.; Koshcheev, S.; Solovyov, L.; Rabchevskii, E.; Shishkina, N.; Anshits, A.
}
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12.

    The cis-trans isomer transformation, spectroscopic and thermal properties of Li, Na, K 1,3-diethyl-2-thiobarbiturate complexes / N. N. Golovnev [et al.] // Polyhedron. - 2015. - Vol. 85. - P. 493-498, DOI 10.1016/j.poly.2014.09.011. - Cited References:42. - The study has been carried out within the public task of the Ministry ofEducation and Science of the Russian Federation for research engineeringat the Siberian Federal University in 2014. V.V.A. is partly supportedby the Ministry of Education and Science of the Russian Federation. . - ISSN 0277-5387
   Перевод заглавия: Трансформация цис-транс изомеров, спектроскопические и термические свойства Li, Na, K 1,3-диэтил-2-тиобарбитуратных комплексов

РУБ Chemistry, Inorganic & Nuclear + Crystallography
Рубрики:
CRYSTAL-STRUCTURE
   2-THIOBARBITURIC ACID
   STRUCTURAL-CHARACTERIZATION
   HYDROGEN-BOND
   DIFFRACTION
   THIOBARBITURATE
   CHEMISTRY
   NETWORKS
   SPECTRA
   SERIES
Кл.слова (ненормированные):
1,3-Diethyl-2-thiobarbituric acid -- Alkali ions -- X-ray diffraction -- Infrared spectroscopy -- Thermal analysis
Аннотация: Three new complexes of 1,3-diethyl-2-thiobarbituric acid (C8H11N2O2S, HDETBA) with Li+, Na+, K+ alkali ions were synthesized. The complexes have been prepared by neutralization of 1,3-diethyl-2-thiobarbituric acid with the corresponding metal hydroxide in aqueous solution. The colorless crystals have been investigated using X-ray single crystal and powder techniques and characterized by differential scanning calorimetry, thermogravimetry and infrared spectroscopy. The compounds of MDETBA with M = Li and M = Na crystallize in the monoclinic lattice with a = 10.678(1) Å, b = 7.2687(9) Å, c = 13.202(2) Å, β = 108.841(2)°, Z = 4, V = 969.8(2) Å3, S.G. P21/n and a = 10.534(2) Å, b = 7.604(1) Å, c = 14.186(1) Å, β = 108.964(4)°, Z = 4, V = 1074.6(3) Å3, S.G. P21/n, respectively. Сompound KDETBA crystallizes in the orthorhombic lattice with a = 4.2541(6) Å, b = 14.739(2) Å, c = 16.635(3) Å, Z = 4, V = 1043.1(3) Å3, S.G. P212121. In Li(I) and Na(I) complexes, the DETBA− ion is in cis-configuration and, in the K(I) complex, this ion is in trans-configuration. The reason for the transformation from cis- to trans-configuration has been rationalized.

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Держатели документа:
Siberian Fed Univ, Dept Chem, Krasnoyarsk 660041, Russia
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia
SB RAS, Inst Chem & Chem Technol, Lab Catalyt Convers Small Mol, Krasnoyarsk 660036, Russia
SB RAS, Irkutsk Favorsky Inst Chem, Phys Chem Lab, Irkutsk 664033, Russia
Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk 630090, Russia

Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Vereshchagin, Sergey N.; Sterkhova, I. V.; Atuchin, V. V.; Ministry of Education and Science of the Russian Federation
}
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13.

    The 5-(isopropylidene)-2-thiobarbituric acid: Preparation, crystal structure, thermal stability and IR-characterization / N. N. Golovnev [et al.] // J. Mol. Struct. - 2014. - Vol. 1068. - P. 216-221, DOI 10.1016/j.molstruc.2014.04.024. - Cited References: 30. - V.V.A. is grateful to the Ministry of Education and Science of Russian Federation for the financial support of the investigation. . - ISSN 0022-2860. - ISSN 1872-8014
   Перевод заглавия: 5-(изопропилиден)-2-тиобарбитуровая кислота: Синтез, кристаллическая структура, термическая стабильность и ИК характеризация

РУБ Chemistry, Physical
Рубрики:
2-THIOBARBITURIC ACID
COMPLEXES
DERIVATIVES
Кл.слова (ненормированные):
5-(Isopropylidene)-2-thiobarbituric acid -- Synthesis -- Thiobarbituric acid -- X-ray diffraction -- Infrared spectroscopy -- Thermography
Аннотация: 5-(Isopropylidene)-2-thiobarbituric acid (1), C7H8N2O2S, has been crystallized by reacting 2-thiobarbituric acid with excessing acetone for 5–6 days under ambient conditions. The pale yellow crystals have been investigated using X-ray single crystal and powder techniques and characterized by differential scanning calorimetry, thermogravimetry and infrared spectroscopy. The compound crystallizes in the monoclinic system with a = 8.8268(19) Å, b = 12.044(3) Å, c = 8.0998(19) Å, β = 105.388(6)°, Z = 4, V = 830.2(3) Å3, space group P21/c. The geometric parameters of the heterocycle of the molecule 1 are similar to those found previously for the molecule of thionedicarbonyl tautomer in polymorphic modifications of 2-thiobarbituric acid. Infrared spectroscopy also evidences the thionedicarbonyl structure of the 1 heterocyclic ring. Intermolecular NH⋯O hydrogen bonds join the molecules in the chains along b axis. The 1 compound is thermally stable up to 230.0 °С and melts with decomposition at 261.4 °C. The results of mass spectrometric analysis are consistent with the structural parameters found by X-ray diffraction methods.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Krasnoyarsk Sci Ctr SD RAS, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk 630090, Russia

Доп.точки доступа:
Golovnev, N. N.; Головнёв, Николай Николаевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Tarasova, L. S.; Atuchin, V. V.; Vladimirova, N. I.
}
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14.

Synthesis, structural, magnetic, and electronic properties of cubic CsMnMoO3F3 oxyfluoride / V. V. Atuchin [et al.] // J. Phys. Chem. C. - 2012. - Vol. 116, Is. 18. - P. 10162-10170, DOI 10.1021/jp302020f. - Cited References: 64. - We thank Dr. A.M. Ziatdinov for the electron paramagnetic resonance measurements. This study was partly supported by SB RAS (Grant 28). . - ISSN 1932-7447

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
RAY PHOTOELECTRON-SPECTROSCOPY
   PHASE-TRANSITIONS
   CORE LEVELS
   SURFACE CHARACTERIZATION
   CRYSTAL-STRUCTURE
   CLEAVED SURFACE
   MIXED-VALENCE
   OXIDES
   MN
   MOLYBDENUM
   Chemical bondings
   Cubic phase
   Energy differences
   Heat capacity measurements
   Oxyfluorides
   Powder samples
   Solid-state synthesis
   Space Groups
   Temperature range
   Valence electron
   Binding energy
   Chemical bonds
   Electronic structure
   Fluorine compounds
   Magnetic properties
   Metal ions
   Photoelectrons
   Rietveld method
   X ray photoelectron spectroscopy
   Electronic properties
Аннотация: A powder sample of CsMnMoO3F3 oxyfluoride has been prepared by solid state synthesis. The pyrochlore-related crystal structure of CsMnMoO3F3 has been refined by the Rietveld method at T = 298 K (space group Fd-3m, a = 10.59141(4) angstrom, V = 1188.123(8) angstrom(3); R-B = 3.44%). The stability of the cubic phase has been obtained over the temperature range T = 110-293 K by heat capacity measurements. Magnetic properties have been measured over the range of T = 2-300 K. The electronic structure of CsMnMoO3F3 has been evaluated by X-ray photoelectron spectroscopy. Chemical bonding effects have been discussed for all metal ions using binding energy difference parameters and wide comparison with related oxides and fluorides. The competition between O-2(-) and F- ions for metal valence electrons has been found.

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Держатели документа:
Atuchin, Victor V.
Gavrilova, Tatyana A.
Kesler, Valery G.] SB RAS, Inst Semicond Phys, Novosibirsk 630090, Russia
Molokeev, Maxim S.
Yurkin, Gleb Yu.
Flerov, Igor N.
Patrin, Gennadii S.] SB RAS, Inst Phys, Krasnoyarsk 660036, Russia
Laptash, Natalia M.] FEB RAS, Inst Chem, Vladivostok 690022, Russia
Flerov, Igor N.
Patrin, Gennadii S.] Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia

Доп.точки доступа:
Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yurkin, G. Yu.; Юркин, Глеб Юрьевич; Gavrilova, T. A.; Kesler, V. G.; Laptash, N. M.; Flerov, I. N.; Флёров, Игорь Николаевич; Patrin, G. S.; Патрин, Геннадий Семёнович
}
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15.

Synthesis, phase purification and magnetic characterization of the (Cr1−x, Mnx)2AlC MAX-phase / K. Sobolev, H. Pazniak, M. Farle [et al.] // J. Mater. Chem. C. - 2021. - Vol. 9, Is. 46. - P. 16516-16522, DOI 10.1039/d1tc03092b. - Cited References: 36. - This work was supported by the Deutsche Forschungsgemeinschaft (DFG) within CRC/TRR 270, project B02 (Project-ID 405553726). K. S. acknowledges German-Russian Interdisciplinary Science Center (G-RISC) for the provided mobility grant that supported the present work. K. S. also acknowledges 5 top 100 Academic Excellence Project of the Russian Ministry of Science and Higher Education for the provided financial support. M. F. acknowledges co-funding by the government of the Russian Federation (agreement No. 075-15-2019-1886) . - ISSN 2050-7526. - ISSN 2050-7534

РУБ Materials Science, Multidisciplinary + Physics, Applied

Аннотация: The Cr2AlC MAX phase is a promising parent compound to introduce magnetism to nano-laminated ternary carbides by doping with Mn. Here, we demonstrate that Mn doping of bulk Cr2AlC powder synthesized by arc melting results in incorporation up to 16 at% Mn in the M-layers of the MAX phase. Simultaneously, the relative amount of secondary phases is overall low, however, increases with Mn doping. We successfully applied chemical treatment in dilute hydrochloric acid to eliminate secondary phases and studied the magnetic properties before and after treatment by magnetometry between 3 K and 800 K. All MAX-phases show a paramagnetic response.

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Держатели документа:
Immanuel Kant Baltic Fed Univ, Kaliningrad 236041, Russia.
Univ Duisburg Essen, Fac Phys, D-47057 Duisburg, Germany.
Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CENIDE, D-47057 Duisburg, Germany.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Sobolev, Kirill; Pazniak, Hanna; Farle, M.; Фарле, Михаель; Rodionova, Valeria; Wiedwald, Ulf; Deutsche Forschungsgemeinschaft (DFG)German Research Foundation (DFG) [CRC/TRR 270, 405553726]; German-Russian Interdisciplinary Science Center (G-RISC); 5 top 100 Academic Excellence Project of the Russian Ministry of Science and Higher Education; government of the Russian Federation [075-15-2019-1886]
}
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16.

Synthesis and investigation of nanostructured Fe1-xNi x(P) columns deposited into porous polycarbona te matrix / R. S. Iskhakov [et al.] // 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. - P264-267 . - ISBN 9814280356 (ISBN); 9789814280358 (ISBN)
Кл.слова (ненормированные):
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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Источник статьи
Держатели документа:
Institute of Physics SB RAS, 660036 Krasnoyarsk, Russian Federation
Institutfur Sicherheitsforschung und Reaktortechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, Germany
Siberian Federal University, 660074 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Chekanova, L. A.; Чеканова, Лидия Александровна; Denisova, E. A.; Денисова, Елена Александровна; Bukaemskiy, A.A.; Melnikova, S.V.
}
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17.

Synthesis and characterization of silica supported iron-containing catalyst for the Friedel-VCrafts benzylation of benzene [Text] / Shuvaeva M.Nuzhdin A.Bayukov O. [et al.] // Proceedings of the 2nd European conference of Control, and Proceedings of the 2nd European conference on Mechanical Engineering (ECC'11/ECME'11). - 2011. - P126-131. - Библиогр.: 3 . - ISBN 978-1-61804-057-2
Аннотация: Benzylation of benzene with benzyl chloride was investigated in the temperature range 25-60°C over silica supported Fe-containing catalyst prepared by simple and reproducible method using FeSO4 as precursor. It was shown that the calcination temperature is the main parameter effecting the catalytic activity: the samples, containing 4-6wt% Fe, provide the reaction of benzene with benzyl chloride after calcinations at 400°C. Selectivity does not depend on the reaction temperature as well as iron content and is defined mainly by the ratio of the reactants. The effect of calcination temperature (300-900°C) on the catalytic properties of Fecontaining catalysts is discussed in connection with the evolution of iron species nature in the course of preparation and reaction.

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Доп.точки доступа:
Shuvaeva, M.; Nuzhdin, A.; Bayukov, O.; Martyanov, O.; Bukhtiyarova, G. A.; European conference of Control(2 ; 2011 ; Dec. ; 1012 ; Puerto De La Cruz, Tenerife, Spain); European conference on Mechanical Engineering(2 ; 2011 ; Puerto De La Cruz, Tenerife, Spain)
}
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18.

Synthesis and characterization of plate-like magnetite nanoparticles / S. V. Stolyar [et al.] // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 1. - Ст. C.P13. - P. 292-293. - Cited References: 3. - The reported study was carried out with the financial support of the Russian Foundation for Fundamental Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Territory Fund for Support of Scientific and Technical Activity in the framework of scientific Projects No. 18-43-243003 and No. 18-42-240006. The work is supported by the Special Program of the Ministry of Education and Science of the Russian Federation for the Siberian Federal University . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS Krasnoyarsk, Russia

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Stolyar, S. V.; Столяр, Сергей Викторович; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Latyshev, N. V.; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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19.

    Synthesis and characterization of nanoscale composite particles formed by 2D layers of Cu-Fe sulfide and Mg-based hydroxide / Y. L. Mikhlin, R. V. Borisov, S. A. Vorobyev [et al.] // J. Mater. Chem. A. - 2022. - Vol. 10, Is. 17. - P. 9621-9634, DOI 10.1039/d2ta00877g. - Cited References: 84. - This research was supported by the Russian Foundation for Basic Research, Krasnoyarsk Territory Administration and Krasnoyarsk Territory Science Foundation, project 20-43-242903. Facilities of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” were employed in the work . - ISSN 2050-7488
   Перевод заглавия: Синтез и исследование наноразмерных композитных частиц, образованных двумерными слоями сульфида Cu-Fe и гидроксида на основе Mg
Кл.слова (ненормированные):
Binary alloys -- Copper compounds -- Electron energy levels -- Electron energy loss spectroscopy -- Electron scattering -- Light absorption -- Light scattering -- Magnesium compounds -- Near infrared spectroscopy -- Paramagnetism -- Sols -- Sulfur compounds -- X-ray photoelectron spectroscopy
Аннотация: We introduce here a multifunctional material composed of alternating atomic sulfide sheets close to the composition of CuFeS2 and Mg-based hydroxide ones (valleriite), which are assembled due to their electric charges of opposite sign. Valleriite particles 50-200 nm in lateral size and 10-20 nm in thickness were synthesized via a simple hydrothermal pathway using various concentrations of precursors and dopants, and examined with XRD, TEM, EDS, X-ray photoelectron spectroscopy, reflection electron energy loss spectroscopy (REELS), Mossbauer, Raman and UV-vis-NIR spectroscopies, and magnetization, dynamic light scattering, and zeta potential measurements. The electronic, magnetic and optical characteristics are found to be critically dependent on the charge (electron density) at the narrow-gap sulfide layers containing Cu+ and Fe3+ cations, and can be tuned via the composition of the hydroxide part. Particularly, substitution of Mg2+ with Al3+ increases the negative charge of the hydroxide layers and reduces the content of Fe3+-OH centers (10-45% of total iron); the effects of Cr and Co dopants entering both layers are more complicated. Mossbauer doublets of paramagnetic Fe3+ detected at room temperature transform into several Zeeman sextets at 4.2 K; the hyperfine fields up to 500 kOe and complex magnetic behavior, but not pure paramagnetism or antiferromagnetism, were observed for valleriites with the higher positive charge of the sulfide sheets, probably due to the depopulation of the minority-spin 3d states of S-bonded Fe3+ ions. Aqueous colloids of valleriite show optical absorption at 500-750 nm, which, along with the peaks at the same energies in REELS, may arise due to quasi-static dielectric resonance involving the vacant Fe 3d band and being dependent on the composition of both layers too. These and other findings call attention to valleriites as a new rich family of 2D materials for a variety of potential applications.

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Держатели документа:
Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of sciences, Akademgorodok, 50/24, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of sciences, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny av. 79, Krasnoyarsk, 660041, Russian Federation
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of sciences”, Akademgorodok, 50, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Mikhlin, Y. L.; Borisov, R. V.; Vorobyev, S. A.; Tomashevich, Y. V.; Romanchenko, A. S.; Likhatski, M. N.; Karacharov, A. A.; Bayukov, O. A.; Баюков, Олег Артемьевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Krylov, A. S.; Крылов, Александр Сергеевич; Krylova, S. N.; Крылова, Светлана Николаевна; Nemtsev, I. V.; Немцев, Иван Васильевич
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20.

Synthesis and characterization of epitaxial Mn5Ge3 thin films on a silicon substrate / M. V. Rautskii, I. A. Yakovlev, A. S. Tarasov, M. A. Bondarev // VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 1, Sect. : Spin dynamics and magnetic resonances. - Ст. B.P2. - P. 266-268. - Cited References: 2. - Support by Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, (project no. 20-42-243007) and support by Krasnoyarsk Regional Fund of Science is acknowledged . - ISBN 978-5-94469-051-7

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Ovchinnikov, S. G. \program com.\; Овчинников, Сергей Геннадьевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, A. S.; Тарасов, Антон Сергеевич; Bondarev, M. A.; Бондарев, Михаил Александрович; Российская академия наук; Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН; Казанский (Приволжский) федеральный университет; Euro-Asian Symposium "Trends in MAGnetism"(8 ; 2022 ; Aug. ; 22-26 ; Kazan); "Trends in MAGnetism", Euro-Asian Symposium(8 ; 2022 ; Aug. ; 22-26 ; Kazan)
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