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1.
Adsorption and Catalytic
Properties of Nanoparticles Fe3O4-Ag in Relation to Various Types of Organic Dyes / O. S. Ivanova, I. S. Edel'man, E. S. Sventitsky [et al.]> //
XII lnternational conference "Mechanisms of catalvtic reactions" : abstracts. - Novosibirsk, 2024. - Ст. PP-09. - P. 174-175. - Библиогр.: 2. - РНФ и Красноярский краевой фонд науки, проект 23-22-10025 . - ISBN 978-5-906376-56-5
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Siberian Federal University
Доп.точки доступа:
Ivanova, O. S.; Иванова, Оксана Станиславовна; Edel'man, I. S.; Эдельман, Ирина Самсоновна; Sventitsky, E. S.; Serdyuk, A. A.; Toropova, E. S.; "Mechanisms of catalytic reactions", International conference(12 ; 2024 ; June 17-21 ; Vladimir); "Механизмы каталитических реакций", международная конференция(12 ; 2024 ; 17-21 июня ; Владимир); 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"
}
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2.
Adsorption properties and
catalytic activity of Fe3O4-Ag nanostructures / O. S. Ivanova, Ch.-R. Lin, I. S. Edelman [et al.]> // Appl. Surf. Sci. - 2024. -
Vol. 665
. - Ст. 160236,
DOI
10.1016/j.apsusc.2024.160236. - 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" . - ISSN 0169-4332. - ISSN 1873-5584
Кл.слова (ненормированные):
FeO-Ag nanostructures
--
Nano-adsorbents
--
Water purification methods
--
Catalytic activity of nanoparticles
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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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russia
Siberian Federal University, Krasnoyarsk 660041, Russia
Department of Applied Physics, National Pingtung University, Pingtung City 90003, Taiwan
Institute of Chemistry and Chemical Technology, Federal Research Center KSC Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Ivanova, O. S.; Иванова, Оксана Станиславовна; Lin, Chun-Rong; Edelman, I. S.; Эдельман, Ирина Самсоновна; Svetlitsky, E. S.; Светлицкий, Евгений Сергеевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Zharkov, S. M.; Жарков, Сергей Михайлович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Vorobyev, S. A.; Petrov, D. A.; Петров, Дмитрий Анатольевич; Lin, En-Szu
}
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3.
Aksenov, S. V.
Majorana modes and Fano resonances in Aharonov–Bohm ring with topologically nontrivial superconducting bridge / S. V. Aksenov, M. Yu. Kagan> // J. Low Temp. Phys. - 2024,
DOI
10.1007/s10909-024-03171-5. - Cited References: 46. - We were inspired by Andreev’s seminal contribution in the superconducting nanophysics—the field which started in fact from Josephson effect and Andreev reflection. M. Yu. Kagan thanks the Program for basic research of the National Research University Higher School of Economics for support. The work was partially carried out within the state assignment of Kirensky Institute of Physics. S.V.A. thanks the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" for support . - Article in press. - ISSN 0022-2291. - ISSN 1573-7357
Кл.слова (ненормированные):
Topological superconductivity
--
Majorana modes
--
Aharonov–Bohm ring
--
Fano resonanse
Аннотация:
We study different resonances (first of all of the Fano type) in the interference device formed by the Aharonov–Bohm ring with superconducting (SC) wire in the topologically nontrivial state playing a role of a bridge between top and bottom arms. We analyze Majorana modes on the ends of the SC wire and show that the collapse of the additional Fano resonance, that is initially induced by transport scheme asymmetry, is connected with the increase of the length of the bridge when the binding energy of the Majorana end modes tends to zero. In local transport regime, the Fano resonances are stable against the change of the transport symmetry. The reasons of both collapse and sustainability are analyzed using a spinless toy model including the Kitaev chain.
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Держатели документа:
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, Russia, 660036
National Research University Higher School of Economics, Myasnitskaya Street 20, Moscow, Russia, 101000
P.L. Kapitza Institute for Physical Problems, Russian Academy of Sciences, Kosygin Street 2, Moscow, Russia, 119334
Доп.точки доступа:
Kagan, M. Yu.; Аксенов, Сергей Владимирович
}
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4.
Analyzing the symmetry
of the Raman spectra of crystals according to angular dependences / E. V. Golovkina, S. N. Krylova, A. N. Vtyurin, A. S. Krylov> // Bull. Russ. Acad. Sci. Phys. - 2024. -
Vol. 88
,
Is. 5
. - P. 773-778,
DOI
10.1134/S1062873824706573. - Cited References: 32. - This work was supported by the Russian Foundation for Basic Research, project no. 21-52-12018. The authors are grateful to Dr. Irena Senkovska for providing our DUT-8(Ni) samples . - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
angular dependences of Raman scattering
--
metal–organic framework crystals
Аннотация:
The authors propose a way of reconstructing the Raman tensor by studying the angular dependences of the intensities of the Raman lines of unoriented microcrystals. The technique is verified using familiar calomel Hg2Cl2 crystals. It is shown that the lines on DUT-8 (Ni) crystals indicating phases with open and closed pores have different types of symmetries. The technique can be used to reconstruct the Raman tensor for any unoriented crystalline sample.
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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Доп.точки доступа:
Golovkina, E. V.; Головкина, Елена Вячеславовна; Krylova, S. N.; Крылова, Светлана Николаевна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич
}
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5.
Biodegradation of microbial
plastic poly(3-hydroxybutyrate) in soil ecosystems at different latitudes / S. V. Prudnikova, E. G. Kiselev, A. V. Demidenko [et al.]> // Giant. - 2024. -
Vol. 18
. - Ст. 100288,
DOI
10.1016/j.giant.2024.100288. - Cited References: 96. - The study was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. FWES-2021-0025) . - ISSN 2666-5425
Кл.слова (ненормированные):
Poly(3-hydroxybutyrate)
--
Degradability
--
Red soil
--
Chernozem
--
Climatic conditions
--
Soil microorganisms
Аннотация:
The features of the degradation of the "green" plastic poly(3-hydroxybutyrate) [P(3HB)] in the soil of various geographical regions were studied: in red ferralitic soil under tropical conditions (Kerala, India) and in chernozem soil under conditions of a sharply continental climate (Eastern Siberia, Russia). Significant differences in the chemical composition, temperature, and humidity of the studied soils were revealed. The number of bacteria and mycelial fungi in the Siberian chernozem was higher than in the red soil of India, from 2-3 to 10 or more times. The degradation of P(3HB) films in the chernozem occurred faster than in the red soil, which was drier, with a low content of humus and minerals, and fewer microorganisms than the chernozem. The half-life of polymer samples in Siberia and India was 64.8 and 126.4 days, respectively. During degradation, a decrease in the molecular weight and an increase in the degree of crystallinity of polymer samples were revealed, which indicates a more active biodegradation of the amorphous phase of the polymer by soil microorganisms. The primary degraders of the polymer have been isolated and identified, and it has been shown that the complexes of degrading bacteria and fungi in different types of soils did not have common species. Despite the presence of species with pronounced depolymerase activity, the rate of film degradation in red ferralitic soils was slowed down by unfavorable environmental conditions. The obtained results confirm the importance of studying the process of PHA degradation in natural conditions.
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Держатели документа:
Siberian Federal University, 79 Svobodny pr, Krasnoyarsk 660041, Russia
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk 660036, Russia
L.V. Kirensky Institute of Physics, 50/12 Akademgorodok, Krasnoyarsk 660036, Russia
International and Interuniversity Centre for Nano Science and Nano Technology, Mahatma Gandhi University, Kottayam 686560, India
Доп.точки доступа:
Prudnikova, S. V.; Kiselev, E. G.; Demidenko, A. V.; Nemtsev, I. V.; Немцев, Иван Васильевич; Shishatskaya, E. I.; Thomas, S.; Volova, T. G.
}
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6.
Ceramic substrates for
filtration membranes based on fine fly ash microspheres / E. V. Fomenko, G. V. Akimochkina, A. G. Anshits [et al.]> // Membr. Membr. Technol. - 2024. -
Vol. 6
,
Is. 2
. - P. 71-83,
DOI
10.1134/S2517751624020033. - Cited References: 58. - The work was carried out with the support of the Russian Science Foundation, project no. 23-19-00269, using the equipment of the Krasnoyarsk Regional Center for Collective Use at the Krasnoyarsk Federal Research Center of the Siberian Branch of the Russian Academy of Sciences . - ISSN 2517-7516. - ISSN 2517-7524
Кл.слова (ненормированные):
fine microspheres
--
fly ash
--
ceramic materials
--
filtration membranes
Аннотация:
A procedure has been proposed for producing ceramic substrates for filtration membranes based on a narrow fraction of fine fly ash microspheres using cold uniaxial pressing followed by high-temperature firing. It has been shown that increasing the sintering temperature from 1000 to 1150°C leads to a decrease in open porosity from 40 to 24%, a decrease in the average pore size from 1.60 to 0.34 μm, and an increase in the compressive strength from 9.5 to 159 MPa. The resulting substrates are characterized by water permeability values of 1210, 310, 240, 170 L m−2 h−1 bar−1 at sintering temperatures of 1000, 1050, 1100 and 1150°C, respectively. Experiments on filtration of aqueous suspensions of fine microspheres (dav = 2.5 µm) and microsilica (dav = 1.9 μm) through a substrate produced at a sintering temperature of 1150°C have shown the rejection close to 100%. The proposed methodology for using ash waste in the production of membrane materials promotes the development of technologies for the integrated processing of thermal energy waste.
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Держатели документа:
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Institute of Computational Modelling, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Доп.точки доступа:
Fomenko, E. V.; Akimochkina, G. V.; Anshits, A. G.; Fadeeva, N. P.; Kharchenko, I. A.; Elsuf’ev, E. V.; Shabanova, K. A.; Шабанова, Ксения Александровна; Maksimova, A. A.; Ryzhkov, I. I.
}
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7.
Crystal structure and
thermoelectric properties of mechanically activated LaCoO3 / V. A. Dudnikov, Yu. S. Orlov, L. A. Solovyov [et al.]> // J. Taiwan Inst. Chem. Eng. - 2024. -
Vol. 162
. - Ст. 105560,
DOI
10.1016/j.jtice.2024.105560. - Cited References: 88. - This study was supported by the Russian Science Foundation , project no. 24-22-00091 . - ISSN 1876-1070. - ISSN 1876-1089
Кл.слова (ненормированные):
Rare-earth cobalt oxides
--
Crystal structure
--
Thermoelectric properties
--
Mechanical activation
Аннотация:
Background: Crystal structure of rare-earth LaCoO3 cobalt oxide subjected to high energy mechanical activation has been studied. In the temperature range of 300–800 K, the electrical conductivity and Seebeck coefficient were measured. Thermal conductivity was measured at 300–480 K. Methods: Comparative analysis of thermoelectric properties of the samples prepared by standard solid-state reaction and using high-energy mechanical activation was carried out. Findings: It was found that the experimental X-ray diffraction patterns are best described within the model that allows the coexistence of two domains in samples with the same crystal symmetry, but different lattice a and c parameters. The percentage ratio of these domains in the samples depends significantly on the size of the initial particles in the solid-state synthesis reaction and the annealing temperature. Mechanical activation and increase of synthesis temperature result in change of Seebeck coefficient sign and significant decrease of electrical resistivity. The Seebeck coefficient of non-activated samples takes positive values over the entire temperature range and decreases monotonically with increasing temperature, in contrast to mechanically activated samples exhibiting ambipolar behavior.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Solovyov, L. A.; Vereshchagin, S. N.; Ustyuzhanin, Yu. N.; Устюжанин, Юрий Николаевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Zeer, G. M.; Borus, A. A.; Борус, Андрей Андреевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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8.
Enhancement of the
magnetoelectric effect in the Bi2Fe4O9/BiFeO3 composite as a result of dipole and migration polarization in mullite / L. V. Udod, S. S. Aplesnin, F. V. Zelenov [et al.]> // J. Mater. Sci. - 2024. -
Vol. 59
,
Is. 24
. - P. 10763-10775,
DOI
10.1007/s10853-024-09885-x. - Cited References: 55 . - ISSN 0022-2461. - ISSN 1573-4803
Аннотация:
The effect of the size of Bi2Fe4O9 and BiFeO3 nanoparticles on the magnetoelectric interaction in the Bi2Fe4O9/BiFeO3 composite with a percentage ratio of 67/33 has been studied. The electrostriction and electric polarization on electric and magnetic field in wide temperature range has been measured. The hysteresis of the polarization and I?V characteristics has been found. Temperature ranges with activation and hopping types of conductivity have been found. The mechanism of electric polarization and the crossover temperature from dipole polarization to migration polarization at 260 K have been established. Linear and quadratic contributions to the magnetoelectric effect have been found. Below 120 K the linear contribution is an order of magnitude greater than the quadratic contribution and above 240 K the quadratic contribution to the ME effect prevails. Models have been proposed to explain the enhancement of the magnetoelectric effect as a result of the migration polarization in mullite and linear magnetoelectric effect in bismuth ferrite. The correlation of temperatures of the extremum of the temperature coefficient of the electrical resistance and the magnetic phase transition in mullite at 260 K indicates a polaron-type conductivity and a strong electron?phonon interaction. A change in the sign of the electrostriction coefficient upon heating and the compression temperature of the composite in an electric field was found.
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Держатели документа:
Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Akademgorodok 50, bld. 38, Krasnoyarsk, Russia, 660036
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia, 660037
Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Zelenov, F. V.; Sitnikov, M. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Romanova, O. B.; Романова, Оксана Борисовна
}
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9.
Fe3O4/Au nanocomposites: Characterization
and cytotoxicity effects in vitro / R. N. Yaroslavtsev, A. V. Tyumentseva, D. A. Velikanov [et al.]> // Mater. Chem. Phys. - 2024. -
Vol. 322
. - Ст. 129524,
DOI
10.1016/j.matchemphys.2024.129524. - Cited References: 44 . - ISSN 0254-0584. - ISSN 1879-3312
Кл.слова (ненормированные):
Magnetic nanoparticles
--
Magnetite
--
Gold nanoparticles
--
Cytotoxicity
Аннотация:
Magnetic nanocomposites containing iron oxide and gold components take great attention last years because of their relative biocompatibility and the ability to combine the magnetic properties of iron and the chemical bonding properties of gold for the possible drug delivery or diagnostics for various diseases. However, such particles have some toxicity to living cells, and the effect depends on many factors, including size, shape, the ratio of components in the composites, and the type of cells affected. And thus, the search for compositions and technologies for producing iron-gold particles with improved properties and reduced cytotoxicity remains relevant. The aim of the study was to synthesize and characterize Fe3O4/Au nanocomposites and evaluate their influence on living cells using the example of cell line HEK293. Fe3O4 nanoparticles (NPs) were synthesized by co-precipitation of Fe2+/Fe3+ water solution in alkaline conditions and then boiled with HAuCl4 in 0.1 M sodium citrate. The NPs properties were estimated by transmission electron microscopy (TEM), vibration magnetometry and ferromagnetic resonance (FMR). According to magnetometric measurements, nanoparticles are mainly in a superparamagnetic state. By fitting magnetization curves, the magnetic characteristics of nanoparticles were determined: saturation magnetization (59.3 emu/g) and magnetic anisotropy constant (K = 0.86·105 erg/cm3). The average particle size estimated from magnetic measurements was 8.7 nm. Considering the presence of a magnetically dead layer, this is in good agreement with the TEM results. The temperature dependence of the FMR linewidth was analyzed using two models. As a result, the parameters MSV and K/MS were determined. The models used showed good agreement. The values of the anisotropy constant (K = 1.06·105 erg/cm3) and the average particle size (6.8 nm) are estimated. The effect of the NPs on the HEK293 cells was studied by MTT-assay, flow cytometry and RT-PCR. The exposure with the NPs lead to a significant decrease of cell metabolic activity in HEK293 cell culture, but this effect was not accompanied by cell death. It was shown that the expression of antioxidant enzymes SOD1 and GPX1 was reduced at the mRNA stage. So the NPs synthesized may affect gene expression and metabolism of HEK293 cells, but this does not have fatal consequences for cell viability.
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Держатели документа:
Krasnoyarsk Science Center, Federal Research Center KSC SB RAS, Akademgorodok 50, Krasnoyarsk, 660036, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russia
Доп.точки доступа:
Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Tyumentseva, A.V.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vazhenina, I. G.; Важенина, Ирина Георгиевна; Volochaev, M. N.; Волочаев, Михаил Николаевич; Stolyar, S. V.; Столяр, Сергей Викторович
}
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10.
Fenton reaction-driven pro-oxidant
synergy of ascorbic acid and iron oxide nanoparticles in MIL-88B(Fe) / L. Bondarenko, R. Baimuratova, A. Dzeranov [et al.]> // New J. Chem. - 2024. -
Vol. 48
,
Is. 22
. - P. 10142-10160,
DOI
10.1039/D4NJ00963K. - Cited References: 94 . - ISSN 1144-0546. - ISSN 1369-9261
Аннотация:
MIL-88B, a promising Fe-based 3D porous metal–organic framework (MOF) catalyst for the Fenton reaction, requires modifications to enhance its pro-oxidant activity and enable magnetic control of the sample. This study reports the successful modification of MIL-88B with iron oxide (Fe3O4) and ascorbic acid (AA). The characterization of the crystal structure and morphology of the Fe3O4–AA MOF sample using X-ray diffraction, Raman and Mossbauer spectroscopy, and scanning electron microscopy revealed that AA facilitated the formation of magnetite with a composition approaching a stoichiometry of Fe2.96O4 while preserving the MOF structure. Specifically, in the presence of hydrogen peroxide (H2O2), Fe3O4–AA–MOF exhibited a 3-fold increase in the Fenton reaction rate for methylene blue degradation compared to the conventional homogeneous system at pH 4.5. Furthermore, Fe3O4–AA–MOF retained the antibacterial properties of AA, as evidenced by its ability to increase reactive oxygen species in luminescent marine bacterium Photobacterium phosphoreum at low concentrations while exhibiting moderate cytotoxicity. The enhanced pro-oxidant activity of the Fe3O4–AA–MOF/H2O2 system is attributed to an AA-promoted surface Fe2+/Fe3+ cycle. A possible mechanism for this system is proposed.
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Держатели документа:
Moscow Aviation Institute (National Research University), Moscow, Russia
Sklifosovsky Research Institute for Emergency Medicine, Moscow, Russia
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka, Moscow region, Russia
Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 660036 Krasnoyarsk, Russia
Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 660036 Krasnoyarsk, Russia
Siberian Federal University, 660041 Krasnoyarsk, Russia
Udmurt Federal Research Center of UB RAS, Izhevsk, Russia
Доп.точки доступа:
Bondarenko, L.; Baimuratova, R.; Dzeranov, A.; Pankratov, D.; Kicheeva, A.; Sushko, E.; Сушко, Екатерина Сергеевна; Kudryasheva, N.; Valeev, R.; Tropskaya, N.; Dzhardimalieva, G.; Kydralieva, K.
}
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11.
First-principles calculations to
investigate optical, phonon and electronic properties of quaternary sulfides SrRECuS3 (RE = La, Nd, Tm) / V. A. Chernyshev, A. V. Ruseikina, M. V. Grigoriev [et al.]> // Inorg. Chem. Commun. - 2024. -
Vol. 165
. - Ст. 112449,
DOI
10.1016/j.inoche.2024.112449. - Cited References: 43. - This work was supported by The Ministry of Science and Higher Education of the Russian Federation (project No. FEUZ-2023-0017) . - ISSN 1387-7003. - ISSN 1879-0259
Кл.слова (ненормированные):
Rare-earth elements
--
Quaternary sulfide
--
Optical properties
--
Ab initio calculations
--
Spectroscopy
Аннотация:
The structure and properties of three layered heterometallic quaternary sulfides SrLaCuS3, SrNdCuS3 and SrTmCuS3 were studied for the first time using first-principles calculations in the stoichiometric and nonstoichiometric approximations. The applied DFT-based computations were performed using a hybrid functional with the contribution of nonlocal exchange in the Hartree-Fock formalism. It was revealed that the nonstoichiometry of SrLaCuS3 and SrNdCuS3 must be considered for modeling phonon spectra, elastic properties and band gaps. The wavenumbers and types of the Raman and "silent" modes at the Г-point were determined. From the analysis of displacement vectors, the degree of participation of ions in each mode was determined. The elastic constants and elastic moduli of the reported sulfides were calculated.
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Держатели документа:
Institute of Natural Sciences and Mathematics, Ural Federal University named after the First President of Russia B.N. Yeltsin, Ekaterinburg 620002, Russian Federation
University of Tyumen, Tyumen 625003, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russian Federation
Scientific and Educational and Innovation Center for Chemical and Pharmaceutical Technologies, Ural Federal University named after the First President of Russia B.N. Yeltsin, Ekaterinburg 620002, Russian Federation
Доп.точки доступа:
Chernyshev, V. A.; Ruseikina, A. V.; Grigoriev, M. V.; Krylova, S. N.; Крылова, Светлана Николаевна; Safin, D. A.
}
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12.
Karavayskiy, A. Yu.
Influence of dielectric relaxations of soil water on the temperature dependence of soil permittivity / A. Yu. Karavayskiy, Yu. I. Lukin> // Opt. Spectrosc. - 2023. -
Vol. 131
,
Is. 12
. - P. 1190-1199,
DOI
10.1134/S0030400X24700206. - Cited References: 23. - This work was supported by the Russian Science Foundation and the Krasnoyarsk Regional Fund of Science and Technology Support within the framework of scientific project no. 22-27-20112 . - ISSN 0030-400X. - ISSN 1562-6911
Кл.слова (ненормированные):
permittivity
--
mineral soil
--
soil moisture
--
bound water
--
Maxwell–Wagner effect
Аннотация:
Using a generalized refractive mixture dielectric model, the influence of the relative permittivity spectra of bound and unbound water in mineral soil on the nature of the temperature dependence of the relative permittivity of natural mineral soil, with a clay fraction content of 41.3%, was studied in the electromagnetic field frequency range from 50 MHz to 15 GHz. The causes of the emergence of intersections in the relative permittivity spectra of mineral soil, obtained at different temperatures but for a sample of the same moisture content, have been studied. It has been proved that the emergence of such an intersection point in the frequency range up to 1.5 GHz is due to the Maxwell–Wagner effect in bound water. The dependences of the frequency of the intersection point of the relative permittivity spectra of mineral soil on the temperature and volumetric content of bound and unbound water have been studied.
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WOS
Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia
Доп.точки доступа:
Lukin, Y. I.; Лукин, Юрий Иванович; Каравайский, Андрей Юрьевич
}
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13.
Kondo effects in
variable-valence manganese-substituted thulium selenide / O. B. Romanova, S. S. Aplesnin, M. N. Sitnikov [et al.]> // Ceram. Int. - 2024. -
Vol. 50
,
Is. 18
,
Pt. B
. - P. 33555-33561,
DOI
10.1016/j.ceramint.2024.06.171. - Cited References: 31. - The authors would like to express their deepest gratitude to the researcher A.I. Galyas from Scientific-Practical Materials Research Center NAS, Minsk for the synthesis of samples MnXTm1-XSe . - ISSN 0272-8842. - ISSN 1873-3956
Кл.слова (ненормированные):
Impedance
--
Magnetic properties
--
Thermopower
--
Kondo effect
Аннотация:
The MnXTm1‒XSe (0 ≤ Х ≤ 0.2) solid solutions have been first synthesized and their structural, magnetic, and transport properties have been studied in the temperature range of 80–1000 K and magnetic fields of up to 12 kOe. The surface morphology of the samples has been examined and the chemical analysis has been carried out. It is shown that the valence change with the increasing substitution concentration is accompanied by a change in the lattice parameter and a decrease in the magnetic moment of the samples. The Kondo temperatures caused by the manganese and thulium subsystem have been found in the low- and room-temperature regions. The temperature of localization of small-radius polarons has been determined. A drastic decrease in the relaxation time in the range of the manganese ion percolation through the lattice in the MnXTm1‒XSe system has been established. The change of the current carrier type upon variation in the temperature and substitution concentration was determined from the Seebeck coefficient. A high-temperature extremum of thermopower was revealed, which is explained within the framework of the Anderson model.
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Читать в сети ИФ
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia
Scientific-Practical Materials Research Center NAS, Minsk, Belarus
Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M.N.; Udod, L. V.; Удод, Любовь Викторовна; Shabanov, A. V.; Шабанов, Александр Васильевич; Goncharov, V.S.; Zhivulko, A.M.; Yanushkevich, K.I.
}
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14.
Lundin, A. G.
Radiospectroscopic investigation of potassium ferrocyanide and isomorphous compounds / A. G. Lundin, E. P. Zeer> //
Proceedings of the International meeting on ferroelectricity. - 1966. - P. 400-409. - Cited References: 10
Доп.точки доступа:
Zeer, E. P.; Зеер, Эвальд Петрович; Лундин, Арнольд Геннадьевич; International Meeting on ferroelectricity(1 ; 1966 ; June28-Luly 1 ; Prague)
}
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15.
Microbially mediated synthesis
of vivianite by Desulfosporosinus on the way to phosphorus recovery / Yu. V. Knyazev, M. S. Platunov, O. P. Ikkert [et al.]> // Environ. Sci.: Adv. - 2024. -
Vol. 3
,
Is. 6
. - P. 897-911,
DOI
10.1039/D4VA00040D. - Cited References: 120. - This study was supported by the Russian Science Foundation, project no. 22-24-00601 (https://rscf.ru/project/22-24-00601/). The electron microscopy and Mössbauer studies were carried out on the equipment of the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences. The research contribution of M. S. P. was partially supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental assignment for Synchrotron radiation facility “SKIF”, Boreskov Institute of Catalysis (project FWUR-2024-0040) . - ISSN 2754-7000
Аннотация:
We explored the role of biomineralization in industrial waste sludge formation, using the laboratory cultivation of Desulfovibrio sp. OL sulfate reducing species isolated from the Komsomolsky waste sludge (Russia). The most frequently reported sulfate-reducing bacteria (SRB) biomineralization products are various iron sulfides. Here we present first studies of the products of Desulfosporosinus metallidurans, acidophilic SRB from acid mine drainage. We analyzed the biomineralized sample using X-ray diffraction, electron microscopy, X-ray absorption and Mossbauer spectroscopies, and magnetization measurements via First-Order Reversal Curve (FORC) diagram analysis. Our findings show that the biomineralization occurring under pure culture conditions leads to the formation of greigite (Fe3S4) nanorods, along with larger microbially mediated crystals of vivianite (Fe3(PO4)2·8H2O) and siderite (FeCO3). Energy dispersive X-ray spectroscopy revealed that the crystal sizes of vivianite and siderite were comparatively larger than those of the nanorod-shaped greigite. Transmission electron microscopy and Mossbauer spectroscopy detected ultrafine ferrihydrite (Fe2O3·nH2O) superparamagnetic nanoparticles with an average size of 2.5 nm. FORC analysis showed significant magnetic interactions among these nanoparticles, suggesting their potential for magnetic separation applications. The current study demonstrates that ferrihydrite nanoparticles have a strong magnetic affinity for other crystal phases produced by Desulfosporosinus metallidurans. Therefore, we believe that the investigated bacterial species can be exploited in advanced magnetic separation techniques. This offers a cost-effective and environmentally friendly method for purifying sediments in industrial waste sludge.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Department of Plant Physiology, Biotechnology, and Bioinformatics, Tomsk State University, Tomsk, Russia
Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Kol'tsovo, Russia
Budker Institute of Nuclear Physics, Novosibirsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Institute of Solid State Chemistry and Mechanochemistry, Novosibirsk, Russia
Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Platunov, M. S.; Ikkert, O. P.; Semenov, S. V.; Семёнов, Сергей Васильевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Nikolenko, A. D.; Nazmov, V. P.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Smorodina, E. D.; Balaev, D. A.; Балаев, Дмитрий Александрович; Karnachuk, O. V.
}
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16.
Mn–Mn magnetic coupling
interaction-induced red emission in a tetra-coordinated lattice / W. Wang, Y. Wei, L. Qiu [et al.]> // Chem. Mater. - 2024. -
Vol. 36
,
Is. 11
. - P. 5574-5586,
DOI
10.1021/acs.chemmater.4c00548. - Cited References: 58. - This work was supported by the National Natural Science Foundation of China (NSFC No. Grants 12374386 and 52072349). We acknowledge Prof Maxim S. Molokeev for the help of Rietveld refinement; his work was supported by the Russian Science Foundation, grant 24-43-00006 . - ISSN 0897-4756. - ISSN 1520-5002
Перевод заглавия:
Красное излучение, вызванное магнитным взаимодействием Mn–Mn в тетракоординированной решетке
Аннотация:
Strong magnetic coupling interactions originating from a short Mn–Mn distance in some heavy Mn2+-doped matrices have important effects on luminescence of single Mn2+ ions and close-knit Mn2+–Mn2+ pairs. However, the intrinsic mechanism of controlling spectral regulation remains elusive since the underlying relationship among Mn–Mn distances, magnetic coupling interactions, and optical properties is unclear. Herein, we create an unusual red emission (620 nm) of Mn2+ in a typical tetra-coordinated lattice of Li2CdGeO4 by simply enhancing the Mn2+-doped level in addition to regular green emission (528 nm). Although the dual emission peaks occupy the same tetra-coordinated crystallographic lattice of CdO4, different temperature-dependent emission behaviors are observed, which expands a possibility in optical thermometry sensors. Detailed Mn–Mn distances are calculated via Rietveld refinement analysis, and their effects on the Mn–Mn coupling interactions are evaluated. Furthermore, the Mn–Mn coupling interaction types are identified through electron spin resonance and magnetic measurements. The continuously decreasing distances between Mn2+ ions strengthen the dipole–dipole coupling effect, resulting in the atypical red emission in a tetra-coordinated lattice environment. These findings elucidate the spectral regulation mechanism from the perspective of magnetic coupling interactions, providing a new pathway to regulate Mn2+-related emission.
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Держатели документа:
Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road , Wuhan 430074, P. R. China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660041, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
Доп.точки доступа:
Wang, W.; Wei, Y.; Qiu, L.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yang, H.; Liu, H.; Gao, R.; Guan, M.; Tu, D.; Li, G.
}
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17.
Near-unity PLQY and
high anti-thermal quenching red luminescence from one-dimensional hybrid manganese chloride for efficient and stable white light-emitting diodes / B. Su, M. S. Molokeev, R. Chen, T. Zhang> // J. Mater. Chem. C. - 2024,
DOI
10.1039/D4TC01477D. - Cited References: 46 . - Article in press. - ISSN 2050-7526. - ISSN 2050-7534
Аннотация:
The discovery of novel Mn2+-based metal halides with excellent luminescence properties and thermostability is particularly of great importance for solid-state lighting (SSL). Herein, a novel one-dimensional hybrid manganese chloride (TMA)MnCl3 of a hexagonal system with a P63/m space group is synthesized via a simple saturation crystallization method. Under 443 nm excitation, (TMA)MnCl3 single crystals exhibit a strong broad-band red emission peak at 645 nm originating from the 4T1 → 6A1 transition of Mn2+ ions with a full width at half maximum of 99 nm and a photoluminescence quantum yield (PLQY) of 98.6%. Moreover, (TMA)MnCl3 shows a high anti-thermal quenching behavior, and the integrated PL intensity still retains 100% of the initial intensity measured at 300 °C, caused by the high structural rigidity. Benefiting from its strong blue light excitation, high PLQY, and excellent thermal stability, a stable white light-emitting diode device is fabricated by combining a 465 nm blue LED chip, green-emitting Lu3Al5O12:Ce3+ and the (TMA)MnCl3 red phosphor with a high color rendering index of 94.3% and a correlated color temperature of 3995 K. This work develops a novel hybrid manganese chloride red-emitter and paves a new path to explore high-performance phosphors excited by blue light for SSL.
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Держатели документа:
School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, P. R. China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk 660041, Russia
Research and Development Department, Kemerovo State University, Kemerovo, Russia
Доп.точки доступа:
Su, B.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Chen, R.; Zhang, T.
}
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18.
On linear cellular
automata / V. R. Kulikov, A. A. Kytmanov, A. O. Poroshin [et al.]> // Program. Comput. Softw. - 2024. -
Vol. 50
,
Is. 1
. - P. 24-30,
DOI
10.1134/S0361768824010067. - Cited References: 22. - This work is supported by the Krasnoyarsk Mathematical Center and financed by the Ministry of Science and Higher Education of the Russian Federation (Agreement 075–02–2023–936) . - ISSN 0361-7688. - ISSN 1608-3261
Аннотация:
Wolfram cellular automata are considered and their operation is demonstrated using an example of traffic flow simulation. For the class of one-dimensional elementary cellular automata, the concept of linearity is introduced in the language of Zhegalkin operators. An algorithm for finding linear Zhegalkin operators with multipliers of three variables is presented. The algorithm is implemented in Python.
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Держатели документа:
Siberian State University, 660041, Krasnoyarsk, Russia
MIREA – Russian Technological University, 119454, Moscow, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia
Доп.точки доступа:
Kulikov, V. R.; Kytmanov, A. A.; Poroshin, A. O.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Fedchenko, D. P.; Федченко, Дмитрий Петрович
}
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19.
Phase transitions and
nonlinear optical property modifications in BaGa4Se7 / L. Isaenko, L. Dong, S. V. Melnikova [et al.]> // Inorg. Chem. - 2024. -
Vol. 63
,
Is. 21
. - P. 10042-10049,
DOI
10.1021/acs.inorgchem.4c01341. - Cited References: 27. - This work was supported by the National Natural Science Foundation of China, grant no. 22133004 (first-principles studies), the Ministry of Education and Science of the Russian Federation, grant FSUS-2020-0036 (crystal growth, crystal structure analysis, and band gap measurement), and partly done on the state assignment of IGM SB RAS no. 122041400031-2 (composition chemical analysis and SHG coefficient measurements) . - ISSN 0020-1669. - ISSN 1520-510X
Аннотация:
Phase transitions can change the crystal structure and modify the physical properties of crystals. In this work, we investigate the phase transition behavior in BaGa4Se7, an important middle infrared (mid-IR) nonlinear optical (NLO) crystal, in the temperature range from room temperature to 1173 K. Interestingly, the BaGa4Se7 crystal undergoes a reversible ferroelastic phase transition at T = 528 K, resulting in the presence of a newly discovered phase (γ-phase) at the higher temperature. The experimental temperature dependence of optical birefringence, as well as the first-principles birefringence and NLO coefficients, reveals that the γ-phase exhibits larger birefringence and better NLO properties compared with those of the low-temperature phase (α-phase). This work demonstrates that phase-transition-induced structural modification can improve the mid-IR NLO properties, which would provide an effective avenue to obtain materials with good optoelectronic performance.
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Держатели документа:
Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk State University, Novosibirsk 630090, Russia
Functional Crystals Lab, Technical Institute of Physics and Chemistry, CAS, University of Chinese Academy of Sciences, Beijing 100190, China
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk 630090, Russia
Доп.точки доступа:
Isaenko, L.; Dong, L.; Melnikova, S. V.; Мельникова, Светлана Владимировна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Korzhneva, K. E.; Krinitsin, P. G.; Kurus, A. F.; Samoshkin, D. A.; Belousov, R. A.; Lin, Zh.
}
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20.
Photonic bound states
in the continuum governed by heating / A. I. Krasnov, P. S. Pankin, G. A. Romanenko [et al.]> // Phys. Rev. E. - 2024. -
Vol. 109
,
Is. 5
. - Ст. 054703,
DOI
10.1103/PhysRevE.109.054703. - Cited References: 50. - This work was supported by the Russian Science Foundation under Grant No. 22-22-00687 . - ISSN 2470-0045. - ISSN 2470-0053
Аннотация:
A photonic crystal microcavity with the liquid crystal resonant layer tunable by heating has been implemented. The multiple vanishing resonant lines corresponding to optical bound states in the continuum are observed. The abrupt change in the resonant linewidth near the vanishing point can be used for temperature sensing.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660041, Russia
Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, Shandong 266000, China
Department of Physics and Engineering, ITMO University, 197101, Russia
Institute of Electronics and Telecommunications, Peter the Great Saint-Petersburg Polytechnic University, Saint-Petersburg 195251, Russia
Доп.точки доступа:
Krasnov, A. I.; Краснов, Алексей Ильдарович; Pankin, P. S.; Панкин, Павел Сергеевич; Romanenko, G. A.; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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