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Nemtsev, A. V.
Ab initio study of the polarization, electronic, magnetic, and optical properties of perovskite SrMO3 (M = Fe, Mn) crystals and thin films containing magnetic ions / A. V. Nemtsev, V. S. Zhandun, V. I. Zinenko // J. Exp. Theor. Phys. - 2018. - Vol. 126, Is. 4. - P. 497-505, DOI 10.1134/S1063776118030056. - Cited References: 30 . - ISSN 1063-7761
Кл.слова (ненормированные):
Antiferromagnetism -- Density functional theory -- Electronic properties -- Iron compounds -- Manganese compounds -- Optical properties -- Perovskite -- Perovskite solar cells -- Polarization -- Strontium compounds
Аннотация: The magnetic, electronic, and polarization properties of the SrFeO3 and SrMnO3 compounds with a perovskite structure are calculated using the density functional theory in the bulk and thin-film states. A ferroelectric instability is found to be absent in the bulk state, and the polar mode is softened in the thin-film state of SrMnO3 in the presence of tensile stresses in the substrate. As a result, a polar phase with a polarization of 23 μC/cm2 appears, which agrees with experimental data. The study of the magnetic and electronic properties demonstrates the existence of G-type antiferromagnetic ordering in SrMnO3 and the appearance of a dielectric gap of about 1.5 eV in its thin film. A ferromagnetic phase with metallic conduction in both the bulk and thin-film states is detected in SrFeO3.

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Публикация на русском языке Немцев, Андрей В. Исследования ab initio электронных, магнитных и оптических свойств кристаллов и тонких пленок перовскитов SrMeOs (Me = Fe, Mn), содержащих магнитные ионы [Текст] / А. В. Немцев, В. С. Жандун, В. И. Зиненко // Журн. эксперим. и теор. физ. - 2018. - Т. 153 Вып. 4. - С. 605-614

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zhandun, V. S.; Жандун, Вячеслав Сергеевич; Zinenko, V. I.; Зиненко, Виктор Иванович; Немцев, Андрей В.
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Amorphous and Crystalline Nickel Oxide Films Obtained by the Extraction-Pyrolysis Method for Electrochromic Cells / A. L. Belousov, T. N. Patrusheva, A. A. Karacharov [et al.] // Theor. Found. Chem. Eng. - 2020. - Vol. 54, Is. 4. - P. 699-705, DOI 10.1134/S0040579520040041. - Cited References: 8. - This work was performed as part of the program "Research and Development for the Priority Areas of the Russian Science-and-Technology Sector for 2014-2020"; Grant Agreement no. 075-15-2019-1843; the Project Unique Identifier RFMEFI60719X0307 . - ISSN 0040-5795. - ISSN 1608-3431

РУБ Engineering, Chemical
Рубрики:
NIO THIN-FILMS
Кл.слова (ненормированные):
nickel extract -- extraction-pyrolysis technology -- thin film -- annealing -- electrochromic cell
Аннотация: This paper reports studies of thin films of nickel oxide obtained by the extraction–pyrolysis method on glass and quartz substrates at temperatures of 380–600°C. The films have been characterized by atomic force microscopy and X-ray diffraction. It is shown that amorphous and crystalline nickel oxide films are formed on the glass. The grain size depends on the annealing temperature, while increased annealing temperatures lead to recrystallization and a decrease in the grain size in NiO films from 130 to 35 nm.

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Публикация на русском языке Пленки аморфного и кристаллического оксида никеля, полученные экстракционно-пиролитическим методом для электрохромных ячеек [Текст] / А. Л. Белоусов [и др.] // Хим. технол. - 2019. - Т. 20 № 5. - С. 215-221

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Baltic State Tech Univ VOENMEX, St Petersburg 190005, Russia.
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia.

Доп.точки доступа:
Belousov, A. L.; Patrusheva, T. N.; Karacharov, A. A.; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Kirik, S. D.; Khol'kin, A. I.; program "Research and Development for the Priority Areas of the Russian Science-and-Technology Sector for 2014-2020" [075-15-2019-1843]; [RFMEFI60719X0307]
}
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Aptamer modified nickel microdiscs in magnetic field kill cancer cells / G. S. Zamay [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P12.6. - P. 563. - This work was supported by the Russian Scientific Fund (grant #14-15-00805) . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
nickel microdiscs -- aptamer -- magnetic field

Доп.точки доступа:
Zamay, G. S.; Замай, Г. С.; Ivanchenko, T.; Иванченко, Т.; Shabanov, A. V.; Шабанов, Александр Васильевич; Prinz, V.; Принц В. Я.; Seleznev, V.; Sokolov, A. E.; Соколов, Алексей Эдуардович; Denisenko, V. V.; Денисенко, Валерий Васильевич; Zamay, S. S.; Замай, С. С.; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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Comparative analysis of methods for enhancement of the photostability of CdTe@TGA QD colloid solutions / A. S. Tsipotan [et al.] // J. Phys. Chem. B. - 2017. - Vol. 121, Is. 23. - P. 5876-5881, DOI 10.1021/acs.jpcb.7b03166. - Cited References:41. - This research was supported by RFBR and Government of Krasnoyarsk Territory by Research Project No. 16-42-240410r_a and by Project No. 0356-2015-0412 of SB RAS Program No. II.2P. V.V.S. is grateful for the support from the Ministry of Education and Science of the Russian Federation (Grant No. 3.6341.2017/VU). . - ISSN 1520-6106

РУБ Chemistry, Physical
Рубрики:
BOVINE SERUM-ALBUMIN
SENSITIZED SOLAR-CELLS
QUANTUM DOTS
Аннотация: The employment of colloid quantum dots in a number of applications is limited by their instability under light irradiation. Additional methods of photostability enhancement of UV+visible-irradiated TGA-stabilized CdTe quantum dots are investigated. Photostability enhancement was observed via either addition of sodium sulphite in the role of chemical oxygen absorber or addition of 1% gelatin, or, finally, by additional stabilization by bovine serum albumine (BSA). The latter method is the most promising, since it not only enhances the quantum dots' photostability but also makes them more biocompatible and extends the possibilities of their biological applications.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Tsipotan, Aleksey S.; Gerasimova, M. A.; Polyutov, Sergey P.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Slabko, Vitaliy V.; RFBR; Government of Krasnoyarsk Territory of SB RAS Program [16-42-240410r_a, 0356-2015-0412, II.2P]; Ministry of Education and Science of the Russian Federation [3.6341.2017/VU]
}
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    Composition design, optical gap and stability investigations of lead-free halide double perovskite Cs2AgInCl6 / J. Zhou [et al.] // J. Mater. Chem. A. - 2017. - Vol. 5, Is. 29. - P. 15031-15037, DOI 10.1039/c7ta04690a. - Cited References: 42. - The present work was supported by the National Natural Science Foundation of China (Grants 91622125 and 51572023), Natural Science Foundations of Beijing (2172036), and Fundamental Research Funds for the Central Universities (FRF-TP-16-002A3). XZ acknowledges the support from the National Key Research and Development Program of China Grant No. 2016YFB0700700. . - ISSN 2050-7488
   Перевод заглавия: Моделирование состава, оптический зазор и исследования стабильности безсвинцового галогенидного двойного перовскита Cs2AgInCl6
Кл.слова (ненормированные):
Crystal growth -- Design for testability -- Energy gap -- Optical properties -- Perovskite -- Perovskite solar cells -- Solar absorbers -- Solar cells -- Structural design -- Band gap engineering -- Direct-gap semiconductor -- Environmentally benign -- Hydrothermal crystal growth -- Hydrothermal reaction -- Optoelectronic applications -- Rock salt structures -- Solar cell absorbers -- Crystal structure
Аннотация: The discovery of lead-free double perovskites provides a feasible way of searching for air-stable and environmentally benign solar cell absorbers. Herein we report the design and hydrothermal crystal growth of double perovskite Cs2AgInCl6. The crystal structure, morphology related to the crystal growth habit, band structure, optical properties, and stability are investigated in detail. This perovskite crystallized in a cubic unit cell with the space group Fm3m and is composed of [AgCl6] and [InCl6] octahedra alternating in a ordered rock-salt structure, and the as-obtained crystal size is dependent on the hydrothermal reaction time. Cs2AgInCl6 is a direct gap semiconductor with a wide band gap of 3.23 eV obtained experimentally and 3.33 eV obtained by DFT calculation. This theoretically predicted and experimentally confirmed optical gap is a prototype of the band gaps that are direct and optically allowed except at the single high-symmetry k-point, which didn't raise interest before but have potential applications in future technologies. Cs2AgInCl6 material with excellent moisture, light and heat stability shows great potential for photovoltaic and other optoelectronic applications via further band gap engineering. © 2017 The Royal Society of Chemistry.

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Держатели документа:
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, College of Electronic Science and Technology, Shenzhen University, Guangdong, China
College of Optoelectronic Engineering, Shenzhen University, Guangdong, China

Доп.точки доступа:
Zhou, J.; Xia, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhang, X.; Peng, D.; Liu, Q.
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Core-shell Fe3O4@C nanoparticles for magneto-mechanical destroy of Ehrlich ascites carcinoma cells / A. Е. Sokolov, O. S. Ivanova, E. S. Svetlitsky [et al.] // The Sixth Asian school-conference on physics and technology of nanostructured materials : Proceedings. - VLadivostok, 2022. - Ст. IV.o.08. - P. 189-190. - Cited References: 2 . - ISBN 987-5-8044-1716-2
Рубрики:

Аннотация: The core-shell magnetic nanoparticles, Fe3O4@C, were synthesized and surface aptamer-functionalized to use them as destroyers of living cancer Ehrlich's ascitic carcinoma cells. The morphology and features of the structural and magnetic properties of the obtained hybrid nanoparticles are studied.

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS
Siberian Federal University
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Science
Department of Applied Physics, National Pingtung University, Taiwan

Доп.точки доступа:
Sokolov, A. Е.; Соколов, Алексей Эдуардович; Ivanova, O. S.; Иванова, Оксана Станиславовна; Svetlitsky, E. S.; Lukyanenko, K. A.; Shabanov, A. V.; Шабанов, Александр Васильевич; Shestakov, N. P.; Шестаков, Николай Петрович; Chen, Y. -Z.; Ying-Zhen Chen; Tseng, Y.-T.; Yaw-Teng Tseng; Lin, C.-R.; Chun-Rong Lin; Asian School-Conference on Physics and Technology of Nanostructured Materials(6 ; 2022 ; Apr. 25-29 ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(6 ; 2022 ; 25-29 апр. ; Владивосток)
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Core–shell Fe3O4@C nanoparticles for the organic dye adsorption and targeted magneto-mechanical destruction of Ehrlich ascites carcinoma cells / O. S. Ivanova, I. S. Edelman, Ch.-R. Lin [et al.] // Materials. - 2023. - Vol. 16, Is. 1. - Ст. 23, DOI 10.3390/ma16010023. - Cited References: 65. - This research was funded partly by the Ministry of Science and Higher Education of the Russian Federation, project FWES-2021-0035. C.-R.L., Y.-Z.C. and A.A.S. thank the National Science and Technology Council of Taiwan for the financial support, Grants NSTC № 108-2923-M-153-001-MY3 and № 110-2112-M-153-005-. Magnetic investigations were carried out in the Center for Collective Use of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” . - ISSN 1996-1944
Кл.слова (ненормированные):
magnetite nanoparticles -- adsorption -- organic dyes -- aptamers -- magnetically induced cell destruction
Аннотация: The morphology, structure, and magnetic properties of Fe3O4 and Fe3O4@C nanoparticles, as well their effectiveness for organic dye adsorption and targeted destruction of carcinoma cells, were studied. The nanoparticles exhibited a high magnetic saturation value (79.4 and 63.8 emu/g, correspondingly) to facilitate magnetic separation. It has been shown that surface properties play a key role in the adsorption process. Both types of organic dyes—cationic (Rhodomine C) and anionic (Congo Red and Eosine)—were well adsorbed by the Fe3O4 nanoparticles’ surface, and the adsorption process was described by the polymolecular adsorption model with a maximum adsorption capacity of 58, 22, and 14 mg/g for Congo Red, Eosine, and Rhodomine C, correspondingly. In this case, the kinetic data were described well by the pseudo-first-order model. Carbon-coated particles selectively adsorbed only cationic dyes, and the adsorption process for Methylene Blue was described by the Freundlich model, with a maximum adsorption capacity of 14 mg/g. For the case of Rhodomine C, the adsorption isotherm has a polymolecular character with a maximum adsorption capacity of 34 mg/g. To realize the targeted destruction of the carcinoma cells, the Fe3O4@C nanoparticles were functionalized with aptamers, and an experiment on the Ehrlich ascetic carcinoma cells’ destruction was carried out successively using a low-frequency alternating magnetic field. The number of cells destroyed as a result of their interaction with Fe3O4@C nanoparticles in an alternating magnetic field was 27%, compared with the number of naturally dead control cells of 6%.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk 660041, Russia
Department of Applied Physics, National Pingtung University, Pingtung City 90003, Taiwan
Laboratory of Biomolecular and Medical Technologies, Krasnoyarsk State Medical University Named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk 660022, Russia
Laboratory for Digital Controlled Drugs and Theranostics, Federal Research Center KSC Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Ivanova, O. S.; Иванова, Оксана Станиславовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Lin, Chun-Rong; Svetlitsky, E. S.; Светлицкий, Евгений Сергеевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Lukyanenko, Kirill A.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Shestakov, N. P.; Шестаков, Николай Петрович; Chen, Ying-Zhen; Spivakov, Aleksandr A.
}
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Development of DNA aptamers for visualization of glial brain tumors and detection of circulating tumor cells / A. S. Kichkailo, A. A. Narodov, M. A. Komarova [et al.] // Mol. Ther. - Nucleic Acids. - 2023. - Vol. 32. - P. 267-288, DOI 10.1016/j.omtn.2023.03.015. - Cited References: 69. - The authors are grateful to all the patients and hospital staff participating in this research. We acknowledge the assistance of the AptamerLab LCC (www.aptamerlab.com) and personally Mr. Vasily Mezko for the aptamer 3D structure optimization and financial and technical support. The authors thank Mr. Alexey Kichkailo, Dr. Arkady B. Kogan, and Dr. Rinat G. Galeev for their general support. Mrs. Valentina L. Grigoreva, and Irina V. Gildebrand for the help with histological staining. Technical and instrumental support was provided by the Multiple-Access Center at Tomsk State University; the Krasnoyarsk Inter-District Ambulance Hospital, named after N.S. Karpovich; John L. Holmes Mass Spectrometry Facility at the University of Ottawa; Federal Siberian Research Clinical Centre under the Federal Medical Biological Agency; Shared Core Facilities of Molecular and Cell Technologies at Krasnoyarsk State Medical University and Krasnoyarsk Regional Centre for Collective Use at the Federal Research Centre “KSC SB RAS”. The confocal fluorescence microscopy research was carried out with the equipment of the Tomsk Regional Core Shared Research Facilities Center of the National Research Tomsk State University. The Center was supported by the Ministry of Science and Higher Education of the Russian Federation, grant no. 075-15-2021-693 (no. 13.RFC.21.0012). Acute toxicity studies were performed in a laboratory certified for preclinical studies, Laboratory of Biological Testing, Institute of Bioorganic Chemistry named after academics M.M. Shemyakin and Y.A. Ovchinnikov Russian Academy of Sciences. The authors are grateful to the Joint Super Computer Center of the Russian Academy of Sciences for providing supercomputers for computer simulations. Development of the glioma tumor model in immunosuppressed mice was supported by the Russian Science Foundation grant No. 22-64-00041 (M.A.D.), https://rscf.ru/en/project/22-64-00041/. Synthesis of 11C-aptamer and PET/CT visualization was funded by the Federal Medical Biological Agency; project 122041800132-2 (A.V.O.). Aptamer selection and their clinical applications were funded by the Ministry of Healthcare of the Russian Federation; project АААА-Б19-219090690032-5 (T.N.Z.). The Ministry of Science and Higher Education of the Russian Federation project FWES-2022-0005 (A.S.K.) supported aptamer characterization, molecular modelling, and in vivo experiments. Mass spectrometry analyses, DNA sequencing, and synthesis were supported by NSERC Discovery Grant (M.V.B.). We acknowledge the European Synchrotron Radiation Facility for SAXS experiments and thank Dr. Bart Van Laer for assistance in using a beamline BM29. SAXS measurements were supported by RFBR № 18-32-00478 for young scientists (R.V.M.). The synchrotron SEC-SAXS data for Gli-55 aptamer were also collected at beamline P12 operated by EMBL Hamburg at the PETRA III storage ring (DESY, Hamburg, Germany) . - ISSN 2162-2531
Аннотация: Here, we present DNA aptamers capable of specific binding to glial tumor cells in vitro, ex vivo, and in vivo for visualization diagnostics of central nervous system tumors. We selected the aptamers binding specifically to the postoperative human glial primary tumors and not to the healthy brain cells and meningioma, using a modified process of systematic evolution of ligands by exponential enrichment to cells; sequenced and analyzed ssDNA pools using bioinformatic tools and identified the best aptamers by their binding abilities; determined three-dimensional structures of lead aptamers (Gli-55 and Gli-233) with small-angle X-ray scattering and molecular modeling; isolated and identified molecular target proteins of the aptamers by mass spectrometry; the potential binding sites of Gli-233 to the target protein and the role of post-translational modifications were verified by molecular dynamics simulations. The anti-glioma aptamers Gli-233 and Gli-55 were used to detect circulating tumor cells in liquid biopsies. These aptamers were used for in situ, ex vivo tissue staining, histopathological analyses, and fluorescence-guided tumor and PET/CT tumor visualization in mice with xenotransplanted human astrocytoma. The aptamers did not show in vivo toxicity in the preclinical animal study. This study demonstrates the potential applications of aptamers for precise diagnostics and fluorescence-guided surgery of brain tumors.

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Держатели документа:
Prof. V.F. Voino-Yasenetsky Krasnoyarsk State Medical University, 1 Partizana Zheleznyaka, Krasnoyarsk 660022, Russia
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences,” 50 Akademgorodok, Krasnoyarsk 660036, Russia
Krasnoyarsk Inter-District Ambulance Hospital named after N.S. Karpovich, 17 Kurchatova, Krasnoyarsk 660062, Russia
Laboratory of Physics of Magnetic Phenomena, Kirensky Institute of Physics, 50/38 Akademgorodok, Krasnoyarsk 660036, Russia
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk 660041, Russia
Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 50 Akademgorodok, Krasnoyarsk 660036, Russia
National Research Center Kurchatov Institute, 1 Akademika Kurchatova, Moscow 123182, Russia
Laboratory of Advanced Materials and Technology, Siberian Physical-Technical Institute of Tomsk State University, 36 Lenina, Tomsk 634050, Russia
Krasnoyarsk Regional Pathology-Anatomic Bureau, 3d Partizana Zheleznyaka, Krasnoyarsk 660022, Russia
Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie gory, Moscow 119991, Russia
Department of Chemistry, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 702-701, South Korea
Nanoscience Center and Department of Chemistry, University of Jyväskylä, P.O. Box 35, Jyväskylä 40014, Finland
A.V. Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” RAS, 59 Leninsky pr., Moscow, 119333, Russia
Federal Siberian Research Clinical Centre under the Federal Medical Biological Agency, Krasnoyarsk, Russia
Krasnoyarsk Regional Clinical Cancer Center, 16 1-ya Smolenskaya, Krasnoyarsk 660133, Russia
Institute of Chemistry and Chemical Technology SB RAS – The Branch of Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036 Krasnoyarsk, Russia
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, Ontario K1N6N5, Canada
Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, 8 Lavrentyev Avenue, 630090 Novosibirsk, Russia

Доп.точки доступа:
Kichkailo, A. S.; Narodov, A. A.; Komarova, M. A.; Zamay, T. N.; Zamay, G. S.; Kolovskaya, O. S.; Erakhtin, E. E.; Glazyrin, Y. E.; Veprintsev, D. V.; Moryachkov, R. V.; Zabluda, V. N.; Заблуда, Владимир Николаевич; Shchugoreva, I.; Artyushenko, P.; Mironov, V. A.; Morozov, D. I.; Gorbushin, A. V.; Khorzhevskii, V. A.; Koshmanova, A. A.; Nikolaeva, E. D.; Grinev, I. P.; Voronkovskii, I. I.; Grek, D. S.; Belugin, K. V.; Volzhentsev, A. A.; Badmaev, O. N.; Luzan, N.; Lukyanenko, K. A.; Peters, G.; Lapin, I. N.; Лапин, И. Н.; Kirichenko, A. K.; Konarev, P. V.; Morozov, E. V; Mironov, G. G.; Gargaun, A.; Muharemagic, D.; Zamay, S. S.; Kochkina, E. V.; Dymova, M. A.; Smolyarova, T. E.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Modestov, A. A.; Tokarev, N. A.; Shepelevich, N.; Ozerskaya, A. V.; Chanchikova, N. G.; Krat, A. V.; Zukov, R. A.; Bakhtina, V. I.; Shnyakin, P. G.; Shesternya, P. A.; Svetlichnyi, V. A.; Petrova, M. M.; Artyukhov, I. P.; Tomilin, F. N.; Томилин, Феликс Николаевич; Berezovski, Maxim V.
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Ovchinnikov, S. G.
Effect of interlayer tunneling on the electronic structure of bilayer cuprates and quantum phase transitions in carrier concentration and high magnetic field / S. G. Ovchinnikov, I. A. Makarov, E. I. Shneyder // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 2. - P. 288-302, DOI 10.1134/S106377611005119X. - Cited References: 64. - This study was supported financially by the program "Quantum Physics of Condensed Media" of the Presidium of the Russian Academy of Sciences (project no. 5.7), the integration projects of the Siberian Branch and the Ural Division of the Russian Academy of Sciences (project no. 40), the Russian Foundation for Basic Research (project no. 09-02-00127), the President of the Russian Federation (grant no. MK-1683.2010.2), and the Federal Target Program P891. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
T-J MODEL
   HIGH-TEMPERATURE SUPERCONDUCTORS
   DIMENSIONAL HUBBARD-MODEL
   FERMI-SURFACE
   COPPER OXIDES
   GROUND-STATE
   CUO2 PLANES
   SPECTRUM
   BAND
   NMR
Кл.слова (ненормированные):
Antibonding -- Bi-layer -- Bilayer cuprates -- Complex sequences -- Cuprates -- Doping levels -- External magnetic field -- Field magnitude -- Hartree-Fock approximations -- High magnetic fields -- Lifshitz transition -- Main effect -- Orbitals -- Perturbation theory -- Quantum phase transitions -- Quantum transitions -- Single-layer structure -- Theoretical study -- Unit cells -- Carrier concentration -- Copper compounds -- Density functional theory -- Electronic properties -- Electronic structure -- Hartree approximation -- Magnetic fields -- Perturbation techniques -- Phase transitions -- Surface structure -- Quantum theory
Аннотация: We present a theoretical study of the electronic structure of bilayer HTSC cuprates and its evolution under doping and in a high magnetic field. Analysis is based on the t-t'-taEuro(3)-J* model in the generalized Hartree-Fock approximation. Possibility of tunneling between CuO2 layers is taken into account in the form of a nonzero integral of hopping between the orbitals of adjacent planes and is included in the scheme of the cluster form of perturbation theory. The main effect of the coupling between two CuO2 layers in a unit cell is the bilayer splitting manifested in the presence of antibonding and bonding bands formed by a combination of identical bands of the layers themselves. A change in the doping level induces reconstruction of the band structure and the Fermi surface, which gives rise to a number of quantum phase transitions. A high external magnetic field leads to a fundamentally different form of electronic structure. Quantum phase transitions in the field are observed not only under doping, but also upon a variation of the field magnitude. Because of tunneling between the layers, quantum transitions are also split; as a result, a more complex sequence of the Lifshitz transitions than in single-layer structures is observed.

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Публикация на русском языке Овчинников, Сергей Геннадьевич. Влияние межслойного туннелирования на электронную структуру двухслойных купратов и квантовые фазовые переходы по концентрации носителей и сильному магнитному полю [Текст] / С. Г. Овчинников, И. А. Макаров, Е. И. Шнейдер // Журнал экспериментальной и теоретической физики. - 2011. - Т. 139 Вып. 2. - С. 334-350

Держатели документа:
[Ovchinnikov, S. G.
Makarov, I. A.
Shneyder, E. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.
Shneyder, E. I.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Makarov, I. A.; Макаров, Илья Анатольевич; Shneyder, E. I.; Шнейдер, Елена Игоревна; Овчинников, Сергей Геннадьевич
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10.

Effects of modified magnetite nanoparticles on bacterial cells and enzyme reactions / L. S. Bondarenko, E. S. Kovel, K. A. Kydralieva [et al.] // Nanomaterials. - 2020. - Vol. 10, Is. 8. - Ст. 1499. - P. 1-20, DOI 10.3390/nano10081499. - Cited References: 83. - This research was funded by the Russian Foundation for Basic Research (#19-315-50048, #19-33-90149, and #18-29-19003) . - ISSN 2079-4991
Кл.слова (ненормированные):
Magnetite nanoparticles -- Humic acids-coated magnetite nanoparticles -- Silica-coated magnetite nanoparticles -- Zeta potential -- Hydrodynamic diameter -- Toxicity -- Bioluminescence -- Bacterial assay -- Enzymatic assay -- Oxidative stress -- Photobacterium phosphoreum -- NADH:FMN-oxidoreductase -- Luciferase
Аннотация: Current paper presents biological effects of magnetite nanoparticles (MNPs). Analyzing effects of MNP’ characteristics (zeta-potential and hydrodynamic diameters) on bacteria and their enzyme reactions was the main focus. Photobacterium phosphoreum and bacterial enzymatic reactions were chosen as bioassays. Three types of MNPs were under study: bare Fe3O4, Fe3O4 modified with 3-aminopropyltriethoxysilane (Fe3O4/APTES), and humic acids (Fe3O4/HA). Effects of the MNPs were studied at a low concentration range (< 2 mg/L) and attributed to availability and oxidative activity of Fe3+, high negative surface charge, and low hydrodynamic diameter of Fe3O4/HA, as well as higher Fe3+ content in suspensions of Fe3O4/HA. Low-concentration suspensions of bare Fe3O4 provided inhibitory effects in both bacterial and enzymatic bioassays, whereas the MNPs with modified surface (Fe3O4/APTES and Fe3O4/HA) did not affect the enzymatic activity. Under oxidative stress (i.e., in the solutions of model oxidizer, 1,4-benzoquinone), MNPs did not reveal antioxidant activity, moreover, Fe3O4/HA demonstrated additional inhibitory activity. The study contributes to the deeper understanding of a role of humic substances and silica in biogeochemical cycling of iron. Bioluminescence assays, cellular and enzymatic, can serve as convenient tools to evaluate bioavailability of Fe3+ in natural dispersions of iron-containing nanoparticles, e.g., magnetite, ferrihydrite, etc.

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Держатели документа:
Moscow Aviation Institute (National Research University), Moscow, 125993, Russian Federation
Institute of Physics SB RAS, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Biophysics SB RAS, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Problems of Chemical Physics RAS, Moscow Region, Chernogolovka, 142432, Russian Federation
University of Szeged, Szeged, H-6720, Hungary
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Bondarenko, L. S.; Kovel, E. S.; Ковель, Екатерина Сергеевна; Kydralieva, K. A.; Dzhardimalieva, G. I.; Illes, E.; Tombacz, E.; Kicheeva, A. G.; Kudryasheva, N. S.
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