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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Белозерова И. Л., Балаев, Дмитрий Александрович, Васильев, Александр Дмитриевич, Шайхутдинов, Кирилл Александрович, Попков, Сергей Иванович, Петров, Михаил Иванович
Заглавие : Транспортные свойства композитов Bi-ВТСП+Ag в окрестности порога перколяции
Коллективы : "Фундаментальные проблемы высокотемпературной сверхпроводимости", международная конференция, Физический институт им. П.Н. Лебедева РАН
Место публикации : Третья международная конференция "Фундаментальные проблемы высокотемпературной сверхпроводимости" ФПС'08: 13-17 окт., Звенигород, 2008 : сборник трудов. - С. 106-107
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Мягков, Виктор Григорьевич, Жигалов, Виктор Степанович, Быкова, Людмила Евгеньевна, Бондаренко, Галина Николаевна
Заглавие : Дальнодействие химического взаимодействия Ni с Fe в эпитаксиальных Ni(001)/Ag(001)/Fe(001) нанопленках
Коллективы : Всероссийская конференция по наноматериалам
Место публикации : Третья Всероссийская конференция по наноматериалам. НАНО 2009: 20-24 апреля 2009 г. : тезисы докладов. - С. 582-585. - ISBN 978-5-93667-123-5
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ivanova O. S., Edel'man I. S., Sventitsky E. S., Serdyuk A. A., Toropova E. S.
Заглавие : Adsorption and Catalytic Properties of Nanoparticles Fe3O4-Ag in Relation to Various Types of Organic Dyes
Коллективы : "Mechanisms of catalytic reactions", International conference, "Механизмы каталитических реакций", международная конференция, Институт катализа им. Г.К. Борескова Сибирского отделения РАН, Институт органической химии им. Н.Д. Зелинского РАН, Московский государственный университет им. М.В. Ломоносова, Сибирское отделение РАН, Центр компетенций НТИ "Водород как основа низкоуглеродной экономики"
Место публикации : XII lnternational conference "Mechanisms of catalvtic reactions": abstracts. - Novosibirsk, 2024. - Ст.PP-09. - P.174-175. - ISBN 978-5-906376-56-5
Примечания : Библиогр.: 2. - РНФ и Красноярский краевой фонд науки, проект 23-22-10025
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanova O. S., Lin, Chun-Rong, Edelman I. S., Svetlitsky E. S., Sokolov A. Е., Zharkov S. M., Sukhachev A. L., Vorobyev S. A., Petrov D. A., Lin, En-Szu
Заглавие : Adsorption properties and catalytic activity of Fe3O4-Ag nanostructures
Колич.характеристики :12 с
Место публикации : Appl. Surf. Sci. - 2024. - Vol. 665. - Ст.160236. - ISSN 01694332 (ISSN), DOI 10.1016/j.apsusc.2024.160236. - ISSN 18735584 (eISSN)
Примечания : Cited References: 48. - The work is supported by the Russian Science Foundation (project no. 23-22-10025, https://rscf.ru/project/ 23-22-10025/) and by the Krasnoyarsk Regional Fund of Science and Technology Support. The electron microscopy and EDS investigations were conducted in the SFU Joint Scientific Center. Magnetic investigations were carried out in the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS"
Аннотация: The morphology and magnetic properties as well as adsorption capacity and catalytic activity of Fe3O4-Ag nanoparticles synthesized by the solvothermal method were studied in dependence on the duration of the thermolysis process (3, 6, and 8 h). X-ray diffraction, transmission electron microscopy, and energy-dispersive spectroscopy measurements showed that the morphology of nanoparticles changed strongly as the duration of thermolysis increased. At 6 and 8 h duration, Fe3O4 nanocrystals grow and assemble into porous spherical globules with an Ag core (samples 2 and 3). These samples demonstrate high magnetization value and very low coercivity. The adsorption capacity of nanoparticles was studied with respect to two organic dyes: cationic methylene blue (MB) and anionic Congo red (CR). The particles showed preferential adsorption of the cationic dye. High catalytic activity towards four dyes: MB, methyl orange (MO), CR, and Rhodamine C (RhC) at the presence of NaBH4 is the remarkable property of these samples. The rate constant of the catalytic reaction was 1.4 min−1. Simultaneous exposure of CR and MO dyes to nanoparticles and NaBH4 caused their irreversible 100 % degradation while in the case of MB and RhC, a transition to their leuco form occurred.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Spiridonova T. S., Solodovnikov S. F., Molokeev M. S., Solodovnikova Z. A., Savina A. A., Kadyrova Y. M., Sukhikh A. S., Kovtunets E. V., Khaikina E. G.
Заглавие : Synthesis, crystal structures, and properties of new acentric glaserite-related compounds Rb7Ag5–3xSc2+x(XO4)9 (X = Mo, W)
Место публикации : J. Solid State Chem. - 2022. - Vol. 305. - Ст.122638. - ISSN 00224596 (ISSN), DOI 10.1016/j.jssc.2021.122638
Примечания : Cited References: 71. - This research was supported by the Ministry of Science and Higher Education of the Russian Federation , projects No. 0273-2021-0008 (Baikal Institute of Nature Management, SB RAS), and No. 121031700313-8 (Nikolaev Institute of Inorganic Chemistry, SB RAS), as well as partial financial support from the Russian Foundation for Basic Research (project No. № 20-03-00533)
Аннотация: The subsolidus phase equilibria in the system Ag2MoO4–Rb2MoO4–Sc2(MoO4)3 were studied and two new triple molybdates, Rb9Ag3Sc2(MoO4)9 and Rb7Ag5Sc2(MoO4)9, were found. The structures of Rb7Ag5Sc2(MoO4)9 and isostructural Rb7Ag5Sc2(WO4)9 of the Cs7Na5Yb2(MoO4)9 type (the space group R32) were determined. The found composition of the triple tungstate crystal, Rb7Ag4.61Sc2.13(WO4)9, indicates a non-stoichiometric compound formula, Rb7Ag5–3xSc2+x(WO4)9. Both structures have one incompletely occupied Ag site, and structure Rb7Ag4.61Sc2.13(WO4)9 also contains two positions with mixed Ag and Sc. Both compounds contain ‘lanterns’ [M2(XO4)9] (M = (Sc, Ag), Sc; X = Mo, W), which are strengthened by three AgO2 dumbbells to give isolated building blocks [Ag3M2(XO4)9] forming two-story hexagonal layers resembling the structure of glaserite K3Na(SO4)2. Similar layers of [Ag3Sc2(WO4)9]9− building blocks were also found by us in the structure of Rb9–xAg3+xSc2(WO4)9, which is close to that of Rb9Ag3Sc2(MoO4)9. Similar layers of the [M2(TO4)9] units were also observed in Cs7Na5Yb2(MoO4)9 and Na13Sr2Ta2(PO4)9. The title compounds belong to the series of rhombohedral triple molybdates and tungstates with a ≈ 9–10 Å and large c-periods (more than 20 Å), which have layered or open 3D framework structures. Like many compounds of this series, Rb7Ag5Sc2(XO4)9 (Х = W, Mo) at elevated temperatures have significant ionic conductivity reaching values 6.1·10−3 S cm−1 at 703 K (X = Mo) and 1.4·10−3 S cm−1 at 733 K (X = W) with Еа = 0.7 eV and 0.6 eV, respectively.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sinyakova E. F., Vasilyeva I. G., Oreshonkov A. S., Goryainov S. V., Karmanov N. S.
Заглавие : Formation of noble metal phases (Pt, Pd, Rh, Ru, Ir, Au, Ag) in the process of fractional crystallization of the CuFeS2 melt
Место публикации : Minerals. - 2022. - Vol. 12, Is. 9. - Ст.1136. - ISSN 2075163X (ISSN), DOI 10.3390/min12091136
Примечания : Cited References: 61. - This work was supported by the Russian Federation state assignment of Sobolev Institute of Geology and Mineralogy of SB RAS, Nikolaev Institute of Inorganic Chemistry SB RAS, and Kirensky Institute of Physics of Federal Research Center KSC SB RAS. The grant number is projects II.1.64. and 40330-2016-0001
Аннотация: The quasi-equilibrium directional crystallization of the melt composition (at. %): Cu 24.998, Fe 25.001, S 49.983, with Ag 0.002, Pd 0.003, Ru 0.004, Rh 0.006, and Au, Pt, Ir (each as 0.001) was carried out. The crystallized cylindrical ingot consisted of two primary zones and three secondary zones with different chemical and phase compositions. The compositions of the primary zones corresponded to high-temperature intermediate solid solution (zone I) and liquid enriched in sulfur (zone II). The compositions of the secondary zones corresponded to low-temperature intermediate solid solution and chalcopyrite (zone Ia), the same intermediate solid solution with chalcopyrite and bornite (zone Ib), and again with bornite, chalcocite, and idaite (zone II). We plotted the distribution curves of Fe, Cu, and S along the ingot, calculated the distribution coefficients of the components during directional crystallization, and clearly showed that, from the initial stoichiometric composition CuFeS2, the intermediate solid solution enriched in Fe and depleted in S is crystallized. Based on the data of directional crystallization and thermal analysis, a cross section was constructed in the intermediate solid solution-sulfide melt region of the Cu-Fe-S system. With solubility in the solid Cu-Fe sulfides lying below detection limit of scanning electron microscopy/energy-dispersive X-ray spectrometry (SEM/EDS), noble elements occurred as individual phases of a size more often <10 µm. They were identified as Ag, RuS2, PdS, Au* (an Au based alloy), (Rh, Ir, Ru)3S8, (Rh, Ir)3S8, Rh3S8, and (Cu, Fe)~2(Pt, Rh)1S~5 phases by electron microprobe. Based on ab initio calculations of crystal structure, electronic band structure, and lattice dynamics of idealized laurite RuS2 phase and the idealized Ir3S8, Rh3S8, and Ru3S8 phases, the interpretation of Raman spectrum of the cation-mixed (Ru, Rh, Ir)S2 sulfide was presented for the first time.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zharkov S. M., Altunin R. R., Yumashev V. V., Moiseenko E. T., Belousov O. V., Solovyov L. A., Volochaev M. N., Zeer G. M.
Заглавие : Kinetic study of a solid-state reaction in Ag/Al multilayer thin films by in situ electron diffraction and simultaneous thermal analysis
Коллективы : Russian Science Foundation, RussiaRussian Science Foundation (RSF) [181300 080]
Место публикации : J. Alloys Compd. - 2021. - Vol. 871. - Ст.159474. - ISSN 0925-8388, DOI 10.1016/j.jallcom.2021.159474. - ISSN 1873-4669(eISSN)
Примечания : Cited References: 47. - This work was supported by the Russian Science Foundation, Russia under grant #181300 080
Предметные рубрики: STRUCTURAL PHASE-TRANSFORMATIONS
COMMITTEE RECOMMENDATIONS
ICTAC KINETICS
Аннотация: A solid-state reaction process in Ag/Al multilayer thin films has been investigated by the methods of in situ electron diffraction, simultaneous thermal analysis, transmission electron microscopy and X-ray diffraction with the aim of studying the phase formation kinetics of intermetallic compounds. The sequence of the phase transformations in the solid-state reaction has been established: Ag+Al→(Ag)+(Al)→(Ag)+δ-Ag2Al→μ-Ag3Al. The process of the solid-state interaction has been shown to consist of two steps; each of them is described by a kinetic model of the nth order reactions with autocatalysis. The kinetic parameters of the autocatalytic process of the phase formation for δ-Ag2Al and µ-Ag3Al, have been determined, in particular, their apparent activation energy: 126 kJ/mol and 106 kJ/mol, respectively.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Voronin A. S., Fadeev Y. V., Govorun I. V., Podshivalov I. V., Simunin M. M., Tambasov I. A., Karpova D. V., Smolyarova T. E., Lukyanenko A. V., Karacharov A. A., Nemtsev I. V., Khartov S. V.
Заглавие : Cu-Ag and Ni-Ag meshes based on cracked template as efficient transparent electromagnetic shielding coating with excellent mechanical performance
Коллективы : Russian Foundation for Basic Research projectRussian Foundation for Basic Research (RFBR) [18-38-00852]; Russian FederationRussian Federation [SP-2235.2019.1]
Место публикации : J. Mater. Sci. - 2021. - Vol. 56. Is. 26. - P.14741-14762. - ISSN 0022-2461, DOI 10.1007/s10853-021-06206-4. - ISSN 1573-4803(eISSN)
Примечания : Cited References: 79. - This work was supported by Russian Foundation for Basic Research project «mol_a» № 18-38-00852 and a scholarship from the President of the Russian Federation SP-2235.2019.1. The sputtering Ag seed mesh and physicochemical analysis of materials was carried out on the equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS»
Предметные рубрики: COPPER NANOWIRES
METALLIC MESH
PLASTIC SUBSTRATE
ELECTRODES
FILMS
Аннотация: Nowadays, the technical advances call for efficient electromagnetic interference (EMI) shielding of transparent devices which may be subject to data theft. We developed Cu–Ag and Ni–Ag meshes on flexible PET substrate for highly efficiency transparent EMI shielding coating. Cu–Ag and Ni–Ag meshes obtained with galvanic deposition of copper and nickel on thin Ag seed mesh which was made by cracked template method. Coefficients S11, S21 and shielding efficiency (SE) were measured for Cu–Ag and Ni–Ag meshes in X-band (8–12 GHz) and K-band (18–26.5 GHz). 90 s copper deposition increase SE from 23.2 to 43.7 dB at 8 GHz with a transparency of 82.2% and a sheet resistance of 0.25 Ω/sq. The achieved maximum SE was 47.6 dB for Cu–Ag mesh with 67.8% transparency and 41.1 dB for Ni–Ag mesh with 77.8% transparency. Cu–Ag and Ni–Ag meshes have high bending and long-term stability. Minimum bend radius is lower than 100 µm. This effect allows to produce different forms of transparent shielding objects, for example, origami method. Our coatings are the leading among all literary solutions in three-dimensional coordinates: of sheet resistance–optical transmittance–cost of produced.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Алтунин Р. Р., Моисеенко Е. Т., Жарков, Сергей Михайлович
Заглавие : Влияние структурных свойств на электросопротивление тонких пленок Al/Ag в процессе твердофазной реакции
Место публикации : Физ. тверд. тела. - 2020. - Т. 62, Вып. 4. - С. 621-626. - ISSN 1063-7834, DOI 10.21883/FTT.2020.04.49130.652. - ISSN 1090-6460(eISSN)
Примечания : Библиогр.: 43. - Работа выполнена при финансовой поддержке Российского научного фонда (грант No 18-13-00080)
Аннотация: На основании результатов исследования процессов твердофазной реакции в тонких пленках Al/Ag (атомное соотношение Al : Ag = 1 : 3) методами in situ дифракции электронов и измерения величины удельного электросопротивления установлена температура начала реакции, а также предложена модель структурных фазовых переходов. Твердофазная реакция начинается при 70oC с образования твердого раствора Al-Ag на границе раздела нанослоев алюминия и серебра. Установлено, что в процессе реакции последовательно формируются интерметаллические соединения γ-Ag2Al → μ-Ag3Al. Показано, что возможность формирования фазы μ-Ag3Al при твердофазной реакции в тонких пленках Al/Ag зависит от соотношения алюминия и серебра, при этом формирование фазы μ-Ag3Al начинается только после того как весь ГЦК-алюминий прореагирует.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov D. A., Lin C. R., Ivantsov R. D., Ovchinnikov S. G., Zharkov S. M., Yurkin G. Yu., Velikanov D. A., Knyazev Yu. V., Molokeev M. S., Tseng Y. T., Lin E. S., Edelman I. S., Baskakov A. O., Starchikov S. S., Lyubutin I. S.
Заглавие : Characterization of the iron oxide phases formed during the synthesis of core-shell FexOy@C nanoparticles modified with Ag
Место публикации : Nanotechnology. - 2020. - Vol. 31, Is. 39. - Ст.395703. - ISSN 13616528 (ISSN), DOI 10.1088/1361-6528/ab9af2
Примечания : Cited References: 46. - The reported study was funded by Joint Research Project of Russian Foundation for Basic Research № 19-52-52002 and Ministry of Science and Technology, Taiwan MOST № 108-2923-M-153-001-MY3 and № 106-2112-M-153-001-MY3. The samples of series 1 were studied with the support of the Ministry of Science and Higher Education of the Russian Federation within the State assignment FSRC «Crystallography and Photonics» RAS. The electron microscopy investigations were conducted in the SFU Joint Scientific Center supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation
Аннотация: Core–shell FexOy@C nanoparticles (NPs) modified with Ag were studied with x-ray diffraction, transmission electron microscopy, energy dispersive elemental mapping, Mössbauer spectroscopy, static magnetic measurements, and optical magnetic circular dichroism (MCD). FexOy@C NPs synthesized by the pyrolysis process of the mixture of Fe(NO3)3 centerdot 9H2O with oleylamine and oleic acid were added to a heated mixture of oleylamine and AgNO3 in different concentrations. The final product was a mixture of iron oxide crystalline NPs in an amorphous carbon shell and Ag crystalline NPs. The iron oxide NPs were presented by two magnetic phases with extremely close crystal structures: Fe3O4 and γ-Fe2O3. Ag is shown to form crystalline NPs located very close to the iron oxide NPs. An assumption is made about the formation of hybrid FexOy@C-Ag NPs. Correlations were obtained between the Ag concentration in the fabricated samples, their magnetic properties and the MCD spectrum shape. Introducing Ag led to a approximately linear decrease of the NPs saturation magnetization depending upon the Ag concentration, it also resulted into the MCD spectrum shift to the lower light wave energies. MCD was also studied for the Fe3O4@C NPs synthesized earlier with the same one-step process using different heat treatment temperatures, and MCD spectra were compared for two series of NPs. A possible contribution of the surface plasmon excitation in Ag NPs to the MCD spectrum of the FexOy@C-Ag NPs is discussed.
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