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| 1. 
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Hidden magnetic instability in the substituted multiferroics (Nd, Tb)Fe3(BO3)4 / I. V. Golosovsky, A. A. Mukhin, V. Skumryev [et al.] // Phys. Rev. B. - 2024. - Vol. 109, Is. 1. - Ст. 014421, DOI 10.1103/PhysRevB.109.014421. - Cited References: 22. - The authors are grateful to Prof. B. Z. Malkin for fruitful discussions. I.V.G. acknowledges financial support from the Russian Foundation for Basic Research under Grant No. 20-02-00109. A.A.M. and V.Yu.I. acknowledge financial support of the magnetic studies and the developed model from the Russian Science Foundation under Project No. 22-42-05004
. - ISSN 2469-9950. - ISSN 2469-9969
Аннотация: In the substituted Nd1–xTbxFe3(BO3)4 (x=0.1 and x=0.2), possessing almost easy-axis magnetic structure at low temperatures, an unusual two-step transition in fields along the trigonal c axis was observed by magnetization and single-crystal neutron diffraction studies. At the first step, only part of the Tb Ising-type moments flip to the c axis, which is accompanied by a significant deviation of the antiferromagnetic Fe spins from the c axis. At the second step, the remaining Tb moments flip and the Fe moments flop into the basal plane. The observed evolution is qualitatively explained by a model assuming small deviations of Tb moments from the trigonal axis due to local environment distortions, which leads to nonequivalence of the Tb ions with respect to effective Tb-Fe exchange and external field. Thus, an intrinsic “hidden” instability of the magnetic system in the magnetic field occurs.
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Держатели документа:
National Research Center “Kurchatov Institute”, B. P. Konstantinov Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia
Prokhorov General Physics Institute, RAS, 119991 Moscow, Russia
Institucio Catalana de Recerca i Estudis Avancats, E-08010 Barcelona, Spain
Universite Grenoble Alpes, CEA, IRIG, MEM, MDN, 38000 Grenoble, France
Kirenskii Institute of Physics, Siberian Division of RAS, 660038 Krasnoyarsk, Russia
Доп.точки доступа:
Golosovsky, I. V.; Mukhin, A. A.; Skumryev, V.; Ressouche, E.; Ivanov, V. Yu.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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| 2.
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Самопроизвольное вращение магнитов, левитирующих над высокотемпературным сверхпроводником / Д. М. Гохфельд, С. Ю. Шаломов, Д. Б. Сультимов, М. И. Петров // Сверхпроводимость: фунд. и приклад. исслед. - 2024. - № 1. - С. 34-40 ; Supercond. Fund. Appl. Res., DOI 10.62539/2949-5644-2024-0-1-34-40. - Библиогр.: 11. - Авторы выражают благодарность А.Л. Фрейдману за создание сверхпроводящей платформы, С.В. Семенову за помощь с температурными измерениями, а также С.В. Комогорцеву за полезные обсуждения
. - ISSN 2949-5644. - ISSN 2949-5660
Перевод заглавия: Spontaneous rotation of magnets levitating above high-Tc superconductor
Кл.слова (ненормированные):
тепловая машина -- левитация -- REBCO -- композитная сверхпроводящая лента -- NdFeB -- heat machine -- levitation -- REBCO -- composite superconducting tape -- NdFeB
Аннотация: Левитация постоянного магнита цилиндрической формы над высокотемпературным сверхпроводником, охлаждаемым жидким азотом, сопровождается спонтанными колебаниями, переходящими во вращение. Причиной вращения является неоднородность намагниченности магнита, вызванная градиентом температур вдоль вертикальной оси. Проведен эксперимент по левитации магнитов Nd–Fe–B над композитным высокотемпературным сверхпроводником. Результаты эксперимента подтверждают, что частота вращения зависит от намагниченности верхней и нижней половин магнита. Предложены способы контроля частоты вращения левитирующего магнита.
Levitation of a cylindrical permanent magnet over a high-temperature superconductor cooled by liquid nitrogen can be accompanied by spontaneous oscillations and rotation. The reason for spontaneous rotation of the magnet is magnetization inhomogeneity induced by the temperature gradient. An experiment was carried out on the levitation of Nd–Fe–B magnets over a composite high-temperature superconductor. The experimental results confirm that the rotation frequency depends on the difference in the magnetization values in its upper and lower halves of the magnet. Methods for controlling the rotation frequency of a levitating magnet are proposed.
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Держатели документа:
Институт физики им. Л.В. Киренского ФИЦ КНЦ СО РАН, ул. Академгородок 50/38, 660036, Красноярск, Россия
Красноярский Государственный Педагогический Университет им. В.П. Астафьева, ул. А. Лебедевой 89, 660049, Красноярск, Россия
Физико-математическая школа Сибирского Федерального Университета, пр. Свободный 79, 660041, Красноярск, Россия
Доп.точки доступа:
Гохфельд, Денис Михайлович; Gokhfeld, D. M.; Шаломов, С. Ю.; Сультимов, Д. Б.; Петров, Михаил Иванович; Petrov, M. I.
}
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| 3.
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Features of the melt–solution synthesis of the TbCr3(BO3)4 single crystals / I. A. Gudim, N. V. Mikhashenok, A. D. Vasiliev [et al.] // J. Cryst. Growth. - 2024. - Vol. 637-638. - Ст. 127716, DOI 10.1016/j.jcrysgro.2024.127716. - Cited References: 22. - The authors thank A.V. Zamkov for assistance in preparing the samples for the conoscopic study. The characterization and examination of the samples were performed at the Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences. - This study was supported in part by the Russian Science Foundation and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activity, project no. 22-12-20019
. - ISSN 0022-0248. - ISSN 1873-5002
Кл.слова (ненормированные):
Growth from melt-solution -- Single crystal growth -- Cromium borates -- Rare-earth compounds -- Oxides -- Magnetic materials
Аннотация: The phase formation of terbium chromoborate TbCr3(BO3)4 in the bismuth trimolybdate and lithium tungstate melt–solutions has been studied. The absence of the terbium chromoborate trigonal phase in the bismuth trimolybdate-based system at all component ratios has been shown. The component ratio in the lithium tungstate-based system has been found at which the TbCr3(BO3)4 trigonal crystals are formed at temperatures above 1100 °C; below this temperature, the monoclinic phase dominates. The structural and magnetic properties of the grown crystals have been studied. It has been established that the trigonal and monoclinic TbCr3(BO3)4 crystals synthesized from the lithium tungstate-based solvent exhibit identical magnetic properties. At the same time, a significant difference of the magnetic properties of the single crystals synthesized from the bismuth molybdate melt–solution has been observed. This difference has been attributed to the effect of Bi3+ ions that partially replace Tb3+ ions.
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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036 Russia
Доп.точки доступа:
Gudim, I. A.; Гудим, Ирина Анатольевна; Mikhashenok, N. V.; Михашенок, Наталья Владимировна; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Melnikova, S. V.; Мельникова, Светлана Владимировна; Pavlovskii, M. S.; Павловский, Максим Сергеевич; Skorobogatov, S. A.; Скоробогатов, Станислав Алексеевич; Pankrats, A. I.; Панкрац, Анатолий Иванович
}
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| 4.
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Distribution of cobalt Co2+ ions in single crystals of spinel Li0.5Ga2.5O4 / V. V. Shapovalov, V. A. Shapovalov, T. V. Drokina [et al.] // Phys. Met. Metallogr. - 2024. - Vol. 125, Is. 1. - P. 27-32, DOI 10.1134/S0031918X23602883. - Cited References: 22
. - ISSN 0031-918X. - ISSN 1555-6190
Кл.слова (ненормированные):
electron paramagnetic resonance -- spinel single crystal -- unit cell -- crystal lattice -- structurally nonequivalent positions of ions
Аннотация: The distribution of Co2+ ions over sublattices and structurally nonequivalent positions in the unit cell of the crystal lattice of a single crystal of lithium gallium spinel Li0.5Ga2.5O4 is shown. This distribution determines the properties of both mono- and nanocrystalline substances. The distribution is obtained by a special technology and is manifested in the electron paramagnetic resonance (EPR) spectra. The distribution of Co2+ ions depends on the structural and magnetic nonequivalence. The structural and magnetic nonequivalence causes a multiminimum behavior of the crystal field potential in the unit cells of single crystals at the locations of Co2+ ions. The Co2+ ions are found in complexes with tetrahedral and octahedral oxygen ions. Three types of EPR spectra of Co2+ ions have been found and investigated. The Cotetr2+ spectrum is attributed to the Co2+ ion, which replaces the Ga3+ ion located in a tetrahedral oxygen environment. The spectrum of the Cooct2+ ion located in the crystal field with axial symmetry belongs to the Co2+ ion replacing the Li+ ion located in an octahedral oxygen environment. The spectrum of the Cooct2+ ion located in a low symmetry crystal field belongs to the Co2+ ion replacing the Ga3+ ion located in an octahedral oxygen environment. The nearest cationic environment of the ion creates rhombic distortions due to the different valence numbers of Li+ and Ga3+. The results of studying the angular dependences of the spectra show the presence of four and twelve magnetically nonequivalent positions in the unit cells.
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Держатели документа:
Math for America (MfA), New York, USA
Galkin Donetsk Institute of Physics and Engineering, 283048, Donetsk, Russia
Kirenskii Institute of Physics, 660036, Krasnoyarsk, Russia
Доп.точки доступа:
Shapovalov, V. V.; Shapovalov, V. A.; Drokina, T. V.; Дрокина, Тамара Васильевна; Vorotynov, A. M.; Воротынов, Александр Михайлович; Val'kov, V. I.; Вальков, В. И.
}
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| 5.
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Ferromagnetic resonance and magnetic anisotropy of 3d-metal wires with composition gradients / E. A. Denisova, L. A. Chekanova, S. V. Komogortsev [et al.] // Bull. Russ. Acad. Sci.: Phys. - 2024. - Vol. 88, Is. 4. - P. 531-535, DOI 10.1134/S1062873823706244. - Cited References: 13
. - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
wires with gradients of composition -- electroless deposition -- ferromagnetic resonance -- magnetic anisotropy
Аннотация: Results are presented from investigating the ferromagnetic resonance spectra of arrays of Co‒Ni and Co‒Fe‒Ni wires with different composition gradients, deposited into polycarbonate track-etched membranes. The effect interfaces and concentration gradients have on the effective fields of the investigated wires is examined. An anomalous angular dependence of the fields of ferromagnetic resonance is observed for the wire arrays at a pore density of ~18% in the membrane.
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Держатели документа:
Kirensky Institute of Physics, Federal Reserch Center “Krasnoyarsk Science Centre,” Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Rechetnev Siberian State University of Science and Technology, 660049, Krasnoyarsk, Russia
Federal Reserch Center “Krasnoyarsk Science Center,” Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Vazhenina, I. G.; Важенина, Ирина Георгиевна; Nemtsev, I. V.; Немцев, Иван Васильевич; Li, O. A.
}
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| 6.
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Tamm plasmon polariton-based planar hot-electron photodetector for the near-infrared region / Yu. V. Konov, D. A. Pykhtin, R. G. Bikbaev, I. V. Timofeev // Nanoscale. - 2024, DOI 10.1039/D4NR00710G. - Cited References: 36
. - Article in press. - ISSN 2040-3364. - ISSN 2040-3372
Аннотация: Light-trapping devices have always been a topic of intense interest among researchers. One such device that has gained attention is the hot-electron photodetector with a tunable detection wavelength. Photodetectors based on plasmon nanostructures that provide excitation of surface plasmon polaritons are challenging to manufacture. To address this issue, a planar hot-electron photodetector based on a Tamm plasmon polariton localized in a metal–semiconductor-multilayer mirror structure has been proposed in this study. The parameters and materials of the structure were adjusted to ensure perfect absorption at the resonance wavelength. As a result, the photoresponsivity of the proposed device can reach 42.6 mA W−1 at 905 nm. For the first time, the photosensitivity was calculated analytically by solving the dispersion law for the Tamm plasmon polariton.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Konov, Yu. V.; Конов, Юрий В.; Pykhtin, D. A.; Пыхтин, Дмитрий А.; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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| 7.
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Enrichment of a fullerene mixture with endohedral metallofullerenes: methodology and evaluation / N. G. Vnukova, N. S. Nikolaev, L. S. Bartseva [et al.] // Fuller. Nanotub. Carbon Nanostructures. - 2024, DOI 10.1080/1536383X.2024.2338524. - Cited References: 46
. - Article in press. - ISSN 1536-383X. - ISSN 1536-4046
Кл.слова (ненормированные):
endohedral metallofullerene -- enrichment -- Lewis acids -- high performance liquid chromatography -- numerical integration of the spectra
Аннотация: A fullerene mixture was enriched with endohedral metallofullerenes (EMF) using Lewis acid (TiCl4), which took 22 min, whereas the standard method requires about 8 h. An algorithm for assessing small-area chromatographic peaks has been proposed, which has improved the accuracy of determination. For example, the area of the C84 peak was 4.24% using the developed program, while the use of chromatograph software estimated the area of this peak to be 1.78%.
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Держатели документа:
Kirensky Institute of Physics, FSBSI "Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russia
Institute of Non-Ferrous Metals Department of Organic and Analytical Chemistry, Siberian Federal University, Krasnoyarsk, Russia
Доп.точки доступа:
Vnukova, N. G.; Внукова, Наталья Григорьевна; Nikolaev, N. S.; Николаев, Никита Сергеевич; Bartseva, L. S.; Барцева, Любовь Сергеевна; Kastiuk, M. R.; Кастюк, Мария Романовна; Elesina, V. I.; Елесина, Виктория Игоревна; Isakova, V. G.; Исакова, Виктория Гавриловна; Churilov, G. N.; Чурилов, Григорий Николаевич
}
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| 8.
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Crystal growth and cation order of Ni3-xCoxB2O6 oxyborates / S. Sofronova, E. Moshkina, A. Chernyshev [et al.] // CrystEngComm. - 2024, DOI 10.1039/D4CE00091A. - Cited References: 28. - The research was funded by Russian Science Foundation and Krasnoyarsk Regional Fund of Science, project № 23-12-20012 (https://rscf.ru/en/project/23-12-20012/)
. - Article in press. - ISSN 1466-8033
Аннотация: A series of single crystals of Ni3-xCoxB2O6 compounds with the kotoite structure and with different concentrations of transition metal ions (x = 0; 0,19; 0,6; 0,93; 2) were obtained. The lattice parameters and atomic coordinates were determined using X-ray diffraction. The theoretical calculations using the WIEN2k package predict that nickel ions tend to occupy the 4f crystallographic position, while cobalt ions tend to occupy the 2a crystallographic positions. The study of the diffuse scattering spectra and comparison of the Racah parameters for the compounds Ni3B2O6 and Co2NiB2O6 provides experimental evidence that the nickel ions occupy crystallographic position 4f.
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Держатели документа:
Kirensky Institute of Physics of the Federal Research Center "Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences", 660036 Krasnoyarsk, Russia
Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Russia
Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Moshkina, E. M.; Мошкина, Евгения Михайловна; Chernyshev, A.; Чернышев, Артем Валерьевич; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Maximov, N.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Andryushchenko, T.; Андрющенко, Татьяна Александровна; Shabanov, A. V.; Шабанов, Александр Васильевич
}
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| 9.
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Biocompatible systems for controlled delivery of antiseptics for topical application / A. V. Vladimirova, A. V. Murueva, A. M. Shershneva [et al.] // J. Sib. Fed. Univ. Biol. - 2024. - Vol. 17, Is. 1. - P. 19-32 ; Журн. СФУ. Биол. - Cited References: 28
. - ISSN 1997-1389. - ISSN 2313-5530
Перевод заглавия: Биосовместимые системы для контролируемой доставки антисептиков для местного применения
Кл.слова (ненормированные):
polyhydroxyalkanoates -- drug delivery system -- controlled delivery -- wound healing -- reconstructive technologies -- topical antiseptics -- полигидроксиалканоаты -- системы доставки лекарств -- контролируемая доставка -- заживление ран -- реконструктивные технологии -- антисептики местного действия
Аннотация: Controlled drug delivery is one of the frontier areas of science, which uses an interdisciplinary approach. The delivery systems offer numerous advantages over conventional dosage forms, such as improved efficacy and patient compatibility, reduced toxicity, and ease of use. Such systems often use micro- and nanoparticles as carriers for drugs, the prolonged effect of which is achieved due to the controlled slow release of the encapsulated drug. This study investigated the effects of encapsulation of various antiseptics (brilliant green, miramistin, and furacilin) and the chemical composition of the polymer on the yield, structure, size, drug release kinetics, and antibacterial activity of microparticles produced from resorbable polyesters of microbiological origin, polyhydroxyalkanoates. Microparticles with a 5.6–94.8 μm diameter were produced. The form of the active substance molecule has been found to be the most significant factor affecting the characteristics of polyhydroxyalkanoate microparticles. The surface structure of particles is rather determined by the chemical composition of the polymer, and the release kinetics to the model medium depends on the encapsulated drug. Microparticles based on PHAs loaded with brilliant green and furacilin showed antibacterial effects in S. aureus and E. coli cultures. The study demonstrated that microparticles with antiseptics encapsulated in them have potential as prolonged drug delivery systems and are of interest for further research.
Технология контролируемой доставки лекарств является одной из передовых областей науки, включающей междисциплинарный научный подход. Эти системы доставки обладают многочисленными преимуществами по сравнению с обычными лекарственными формами, такими как повышенная эффективность и биосовместимость, сниженная токсичность и простота использования. В таких системах в качестве носителей лекарственных средств часто используют микро- и наночастицы, пролонгированное действие которых достигается за счет контролируемого медленного высвобождения инкапсулированного лекарственного средства. В данном исследовании изучалось влияние включения различных антисептиков (бриллиантовый зелёный, мирамистин и фурацилин), а также химического состава полимера на выход, структуру, размер, кинетику высвобождения лекарственных средств и антибактериальную активность микрочастиц, полученных из резорбируемых полиэфиров микробиологического происхождения, полигидроксиалканоатов. Было получено семейство микрочастиц диаметром 5,6–94,8 мкм. Установлено, что наиболее значимым фактором, влияющим на характеристики микрочастиц полигидроксиалканоатов, является форма молекулы активного вещества. Структура поверхности частиц больше зависит от химического состава полимера, а кинетики выхода в модельную среду – от инкапсулированного лекарства. Микрочастицы на основе ПГА с депонированными бриллиантовым зеленым и фурацилином показали антибактериальное действие в культурах S. aureus и E. coli. Результаты продемонстрировали, что микрочастицы с депонированными антисептиками обладают потенциалом в качестве систем пролонгированной доставки и представляют интерес для дальнейших исследований.
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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
L.V. Kirensky Institute of Physics SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation
Доп.точки доступа:
Vladimirova, A. V.; Murueva, A. V.; Shershneva, A. M.; Prudnikova, S. V.; Shabanov, A. V.; Шабанов, Александр Васильевич; Shishatskaya, E. I.
}
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| 10.
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Machine-learning-driven discovery of Mn4+-doped red-emitting fluorides with short excited-state lifetime and high efficiency for mini light-emitting dIode displays / H. Ming, Ya. Zhou, M. S. Molokeev [et al.] // ACS Mater. Lett. - 2024. - Vol. 6. - P. 1790-1800, DOI 10.1021/acsmaterialslett.4c00263. - Cited References: 39. - This work was financially supported by the National Key Research and Development Program of China (No. 2022YFB3503800), National Natural Science Foundation of China (Grants Nos. 52202170 and 52322208), Natural Science Foundation of Guangdong Province (No. 2022A1515140032) and Distinguished Youth Foundation of Guangdong Scientific Committee (No. 2023B1515020059). This work was also supported by the Tyumen Oblast Government, as part of the West-Siberian Interregional Science and Education Center’s Project No. 89-DON (3). H. Ming acknowledges the fellowship support from the China Scholarship Council (CSC No. 202206150038)
. - ISSN 2639-4979
Перевод заглавия: Открытие на основе машинного обучения фторидов красного излучения, легированных Mn4+, с коротким временем жизни в возбужденном состоянии и высокой эффективностью для мини-светодиодных дисплеев
Аннотация: The discovery of high-efficiency Mn4+-activated fluoride red phosphors with short excited-state lifetimes (ESLs) is urgent and crucial for high-quality, wide-color-gamut display applications. However, it is still a great challenge to design target phosphors with both short ESL and high luminescence efficiency. Herein, we propose an efficient machine learning approach based on a small dataset to establish the ESL prediction model, thereby facilitating the discovery of new Mn4+-activated fluorides with short ESLs. Such a model can not only accurately predict the ESLs of Mn4+ in fluorides but also quantify the impact of structure features on ESLs, therefore elucidating the “structure-lifetime” correlations. Guided by the correlations, two new Mn4+-doped tetramethylammonium (TMA)-based hybrid fluorides (TMA)2BF6:Mn4+ (B = Sn or Hf) with both short ESLs (τ ≤ 3.7 ms) and high quantum efficiencies (internal QEs ˃ 92%, external QEs ˃ 55%) have been discovered successfully. A prototype displayer with excellent performance (∼124% National Television Standards Committee (NTSC) color gamut) is assembled by employing a (TMA)2SnF6:Mn4+-based white Mini-LED backlight module, demonstrating its practical prospects in high-quality displays. This work not only brings promising candidates for Mn4+-doped fluoride phosphors but also provides a valuable reference for accelerating the discovery of new promising phosphors.
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Держатели документа:
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, and Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, South China University of Technology, Guangzhou 510641, China
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Laboratory of Theory and Optimization of Chemical and Technological Processes, University of Tyumen, Tyumen 625003, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk 660041, Russia
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China
Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials and College of Materials, Xiamen University, Xiamen 361005, China
Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528225, China
Доп.точки доступа:
Ming, H.; Zhou, Ya.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhang, Ch.; Huang, L.; Wang, Yu.; Sun, H.-T.; Song, E.; Zhang, Q.
}
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| 11.
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Synthesis and study of superhigh-concentrated organosols of silver nanoparticles / S. A. Vorobyev, M. Yu. Flerko, S. A. Novikova [et al.] // Colloid J. - 2024. - Vol. 86, Is. 2. - P. 208-217, DOI 10.1134/S1061933X23601294. - Cited References: 33. - The work was carried out with the financial support of the basic project FWES-2021-0014 of the Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, and the Federal Program "Priority 2030" using the equipment of the Krasnoyarsk regional center for collective use of the Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences
. - ISSN 1061-933X. - ISSN 1608-3067
Кл.слова (ненормированные):
silver nanoparticles (NPs) -- concentrated silver organosols -- phase transfer of nanoparticles -- X-ray photoelectron spectroscopy (XPS) -- transmission electron microscopy (TEM) -- conductive silver films
Аннотация: Due to their unique properties, organosols of silver nanoparticles are widely used in optical and semiconductor devices, to produce electrically and thermally conductive films, as catalysts, antibacterial materials, etc. This work proposes a simple and highly productive method for the preparation of silver organosols, which have a metal concentration as high as 1800 g/L and contain spherical nanoparticles with low polydispersity and a median size of 9.1 nm. The method consists in the initial preparation of silver nanoparticle hydrosols with a concentration of higher than 30 g/L followed by the transfer of the NPs into an organic phase of o-xylene. A set of physical research methods has been employed to study the regularities of the extraction of silver nanoparticles with o-xylene in the presence of cetyltrimethylammonium bromide (CTAB) and ethanol and to determine the optimal process conditions, under which the extraction degree is as high as 62.5%. It has been found that bromine anions contained in CTAB molecules cause the aggregation of some amount of silver nanoparticles with the formation of silver metal sediment in the aqueous phase. According to X-ray photoelectron spectroscopy data, the sediment contains bromide ions (up to 4 at %) on the particle surface. Organosols synthesized under optimal conditions are stable for more than 7 months and withstand repeated cycles of drying and redispersing. Silver organosols have been used to obtain metal films with an electrical conductivity of about 68 500 S/cm, which increases to 412 000 and 509 500 S/cm (87.8% of the electrical conductivity of bulk silver) after thermal treatment at 150 and 250°C, respectively.
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Держатели документа:
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Tomsk National Research State University, 634050, Tomsk, Russia
Доп.точки доступа:
Vorobyev, S. A.; Flerko, M. Yu.; Novikova, S. A.; Mazurova, E. V.; Tomashevich, Ye. V.; Likhatski, M. N.; Saikova, S. V.; Samoilo, A. S.; Zolotovsky, N. A.; Золотовский, Н. А.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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| 12.
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Investigation of surface magnetism in systems based on MnBi2Te4 using the magneto-optical Kerr effect / D. A. Glazkova, D. A. Estyunin, A. S. Tarasov [et al.] // Crystallogr. Rep. - 2024. - Vol. 69, Is. 1. - P. 79-84, DOI 10.1134/S1063774523601296. - Cited References: 39. - This study was supported by the St. Petersburg State University (project no. 94031444) and the Russian Science Foundation (grant no. 23-12-00016). The samples were synthesized within the project "State Assignment for the Sobolev Institute of Geology and Mineralogy of the Siberian Branch of the Russian Academy of Sciences and the Rzhanov Institute of Semiconductor Physics of the Siberian Branch of the Russian Academy of Sciences"
. - ISSN 1063-7745. - ISSN 1562-689X
Аннотация: MnBi2Te4, Mn(Bi,Sb)2Te4, and MnBi2Te4(Bi2Te3)m (m ≥ 1) are assigned to magnetic topological insulators. Successful application of these materials in nanoelectronic devices calls for comprehensive investigation of their electronic structure and magnetic properties in dependence of the Bi/Sb atomic ratio and the number m of Bi2Te3 blocks. The magnetic properties of the surface of MnBi2Te4, MnBi4Te7, and Mn(Bi1-xSbx)2Te4 compounds (x = 0.43 and 0.32) have been studied using the magneto-optical Kerr effect. It is shown that the temperatures of magnetic transitions on the surface and in the bulk of MnBi4Te7 and Mn(Bi, Sb)2Te4 differ significantly.
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Держатели документа:
St. Petersburg State University, 198504, St. Petersburg, Russia
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036, Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 660041, Krasnoyarsk, Russia
Krasnoyarsk State Agrarian University, Achinsk Branch, 662155, Achinsk, Russia
Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
Доп.точки доступа:
Glazkova, D. A.; Estyunin, D. A.; Tarasov, A. S.; Тарасов, Антон Сергеевич; Kosyrev, N. N.; Косырев, Николай Николаевич; Komarov, V. A.; Комаров, Василий Андреевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Golyashov, V. A.; Tereshchenko, O. E.; Kokh, K. A.; Koroleva, A. V.; Shikin, A. M.
}
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| 13.
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Correction: Volova et al. Laser processing of polymer films fabricated from PHAs differing in their monomer composition. Polymers 2021, 13, 1553 / T. G. Volova, A. I. Golubev, I. V. Nemtsev [et al.] // Polymers. - 2024. - Vol. 16, Is. 8. - Ст. 1075, DOI 10.3390/polym16081075. - Cited References: 1
. - ISSN 2073-4360
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Держатели документа:
Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
L.V. Kirensky Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/38 Akademgorodok, 660036 Krasnoyarsk, Russia
Special Design and Technological Bureau ‘Nauka’ Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/45 Akademgorodok, 660036 Krasnoyarsk, Russia
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences” 50 Akademgorodok, 660036 Krasnoyarsk, Russia
Доп.точки доступа:
Volova, T. G.; Golubev, A. I.; Голубев, Алексей И.; Nemtsev, I. V.; Немцев, Иван Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Dudaev, A. E.; Shishatskaya, E. I.
}
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| 14.
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Light-driven anisotropy of 2D metal-organic framework single crystal for repeatable optical modulation / Yu. A. Kenzhebayeva, N. K. Kulachenkov, S. S. Rzhevskiy [et al.] // Commun. Mater. - 2024. - Vol. 5, Is. 1. - Ст. 48, DOI 10.1038/s43246-024-00485-5. - Cited References: 84. - V.A.M. acknowledges the financial support from the Russian Science foundation (Grant Numb. 22-72-10027 “Flexible hybrid materials as active layer in memory devices”, work on pump-probe and nonlinear optical spectroscopuy) and the Priority 2030 Federal Academic Leadership Program. Y.A.K. acknowledges the financial support from the Russian Science foundation (Grant Numb. 19-79-10259 for transmission optical spectroscopy with heating and laser mode). S.S. acknowledges the financial support by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program. P.A. acknowledge AFM Centre of ITMO University for help with the MOF mechanical characterization. Temperature-dependent SCXRD analysis was carried out at XRD facilities of NIIC operating with the support from the Ministry of Science and Higher Education of the Russian Science Federation (project 121031700321-3). The authors would like to thank Mirko Schoenitz and Irina Molodetsky for discussion of crystallographic data. A.K. acknowledges the financial support from RFBR and DFG (Grant Numb. 21-52-12018 for Raman measurements). Raman experiments have been performed in the Center of Common Use of the Krasnoyarsk Scientific Center SB RAS
. - ISSN 2662-4443
Аннотация: Structural transformations of metal-organic frameworks (MOFs) go through a complex energy landscape with multiple intermediate states. Although the transformations allow controlling the functional properties of the MOFs, an imbalance between MOF flexibility and rigidity sets a fundamental barrier to achieving fast and multiple transformations. Here, we study the stimuli-responsive structural transformation in a 2D MOF assembled from paddle-wheel secondary building units joined by a semi-flexible organic ligand with 1,2,4-triazole and carboxylate groups with a rigid adamantane cage between them. The structure results in a distinctive combination of MOF flexibility and rigidity, thus, facilitating a continuous transformation driven by laser light. We reveal the laser-induced anisotropic thermal expansion nature of such transformation, initiating optical changes of the 2D MOF. The latter is utilized for fast and highly repeatable optical modulation of over 10,000 cycles. The endurance of such a 2D MOF-based optical modulator during 1 year of storage at ambient conditions paves the way to design tunable and robust MOFs for diverse applications.
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Держатели документа:
School of Physics and Engineering, ITMO University, St Petersburg, 197101, Russia
Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, 620137, Russia
Center for Advancing Electronics, Technische Universitat Dresden, 01069, Dresden, Germany
Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ, 07102, USA
South Ural State University, Chelyabinsk, 454080, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, 630090, Russia
Institut Jean Lamour, Universit de Lorraine, UMR CNRS 7198, 54011, Nancy, France
Доп.точки доступа:
Kenzhebayeva, Yu. A.; Kulachenkov, N. K.; Rzhevskiy, S. S.; Slepukhin, P. A.; Shilovskikh, V. V.; Efimova, A.; Alekseevskiy, P.; Gor, G. Y.; Emelianova, A.; Shipilovskikh, S.; Yushina, I. D.; Krylov, A. S.; Крылов, Александр Сергеевич; Pavlov, D. I.; Fedin, V. P.; Potapov, A. S.; Milichko, V. A.
}
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| 15.
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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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| 16.
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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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| 17.
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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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| 18.
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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.
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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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| 20.
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Yellow-orange emission in Sb3+-doped hexakis(thiocarbamidium) hexabromoindium(III) tribromide / N. N. Golovnev, M. A. Gerasimova, I. M. Belash [et al.] // Inorg. Chem. - 2024. - Vol. 63, Is. 20. - P. 9175-9183, DOI 10.1021/acs.inorgchem.4c00555. - Cited References: 53. - This work was supported by the Russian Science Foundation, project No. 24-43-00006
. - ISSN 0020-1669. - ISSN 1520-510X
Аннотация: A luminescent zero-dimensional organic–inorganic hybrid indium halide (TUH)6[In1–xSbxBr6]Br3 (TU = thiourea, 0 ≤ x ≤ 0.0998) was synthesized via the solvothermal method. In structures, resolved by single-crystal X-ray diffraction, isolated distorted [InBr6]3– and [SbBr6]3– octahedra are linked to organic TUH+ cations by intermolecular N–H···Br and N–H···S hydrogen bonds. The crystals were characterized by elemental analysis, TG-DSC, powder X-ray diffraction, FTIR analysis, and steady-state absorption and photoluminescence spectroscopy. (TUH)6[In1–xSbxBr6]Br3 exhibits a broadband yellow-orange emission centered at 595–602 nm with a half-width of 141–149 nm (0.48–0.52 eV) and a large Stokes shift of 232–238 nm (1.33–1.35 eV). This emission can be attributed to the self-trapped exciton emission of triplet states of the octahedral anion [SbBr6]3– or [InBr6]3–. Two possible emission mechanisms were discussed. Doping with Sb3+ leads to a significant increase in photoluminescence quantum yield from 25.7 at x = 0 to 48.4% at x = 0.0065, when excited at 365 nm, indicating the potential use of (TUH)6[In1–xSbxBr6]Br3 compounds in the field of photonics.
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Держатели документа:
Siberian Federal University, Krasnoyarsk 660041, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Krasnoyarsk 660036, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
Доп.точки доступа:
Golovnev, N. N.; Gerasimova, M. A.; Belash, I. M.; Zolotov, A. O.; Molokeev, M. S.; Молокеев, Максим Сергеевич
}
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