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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Кашникова М. Е., Уткин Н. А., Смольников Н. А., Пискунов Ю. В., Садыков А. Ф., Казак, Наталья Валерьевна
Заглавие : 11B ЯМР-исследование кобальтового людвигита Co3BO5
Коллективы : "Новое в магнетизме и магнитных материалах", международная конференция, Научный совет по физике конденсированных сред РАН, МИРЭА - Российский технологический университет, Московский государственный университет им. М.В. Ломоносова, Магнитное общество России
Место публикации : Новое в магнетизме и магнитных материалах: сборник трудов XXV международной конференции/ прогр. ком.: Р. С. Исхаков, С. Г. Овчинников [и др.]. - 2024. - Секция 6 [Сборник 6]: Резонансные явления в магнетиках. - С. 25-28. - ISBN 978-5-4465-1869-2
Примечания : Библиогр.: 6. - Выполнено в рамках госзадания Минобрнауки № 122021000035-6
Аннотация: Впервые методами ядерного магнитного резонанса (ЯМР) выполнено исследование порошков оксибората кобальта Co3BO5 в широкой области температур (85 – 295 K) во внешнем магнитном поле H0 = 9.27 Тл. Определены параметры тензора градиента электрического поля (ГЭП) и магнитного сдвига линии ЯМР на позициях ядра-зонда 11B. Выделены орбитальный 11K0 и спиновый 11Ks вклады в сдвиг. Из температурных зависимостей сдвига и магнитной восприимчивости в Co3BO5 была определена константа сверхтонкого взаимодействия (СТВ) иона B3+ с ближайшим магнитным окружением.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Govorun I. V., Belyaev B. A., Zav'yalov Ya. B., Shumilov T. Y., Afonin A. O., Ugryumov A. V., Galeev R. G.
Заглавие : A 10 GHz monolithic filter based on stripline resonators with a split conductor
Колич.характеристики :6 с
Место публикации : Dokl. Phys. - 2023. - Vol. 68, Is. 12. - P.434-439. - ISSN 10283358 (ISSN), DOI 10.1134/S1028335823120030. - ISSN 15626903 (eISSN)
Примечания : Cited References: 18. - This work was carried out within the framework of Agreement no. 470 of August 30, 2022, between the Institute of Physics, Siberian Branch, Russian Academy of Sciences; the Regional Science Foundation; and JSC NPP Radiosvyaz, for a competition of scientific, technical, and innovative projects in the interests of the first climate Scientific and Educational Center "Yenisei Siberia"
Аннотация: The monolithic design of a compact bandpass filter X-band is made on the technology of multilayered printed circuit boards. Quarter-wave stripline resonators of the filter have two conductors divided by a layer of prepreg having low parameters that bond together the design. This eliminates the influence of the prepreg on the characteristics of the devices, ensuring good repeatability of filters in mass production. To increase the high-frequency stopband of the filter, one of the conductors of each resonator is cut in half by a transverse slit. The constructive sizes of the device were obtained by parametric synthesis using the electrodynamic analysis of its 3D model. The experimental data of the five-order filter are in good agreement with the electromagnetic simulation of filter of the 3D model. The experimental device has a central frequency of the passband of 10 GHz and a fractional bandwidth of 5.7%, and its dimensions and weight are 18.0 × 5.4 × 2.1 mm3 and 0.5 g. The important advantage of the developed design is the possibility of its installation on the board using the surface mounting method.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fedorov A. S., Eremkin E. V., Krasnov P. O., Gerasimov V. S., Agren H., Polyutov S. P.
Заглавие : A hybrid quantum–classical theory for predicting terahertz charge-transfer plasmons in metal nanoparticles on graphene
Колич.характеристики :13 с
Место публикации : J. Chem. Phys. - 2024. - Vol. 160, Is. 4. - Ст.044117. - ISSN 00219606 (ISSN), DOI 10.1063/5.0178247. - ISSN 10897690 (eISSN)
Примечания : Cited References: 61. - This study was funded by the Ministry of Science and High Education of Russian Federation, Project No. FSRZ-2023-0006. The calculations of CTPs in specific NP–graphene complexes were performed within the RSF Grant No. 23-12-20007 and the Krasnoyarsk Territorial Foundation for Support of Scientific and R & D Activities, Agreement No. 256. H. Ågren was supported by the Swedish Science Research Council on Contract No. 2022-03405
Аннотация: Metal nanoparticle (NP) complexes lying on a single-layer graphene surface are studied with a developed original hybrid quantum–classical theory using the Finite Element Method (FEM) that is computationally cheap. Our theory is based on the motivated assumption that the carrier charge density in the doped graphene does not vary significantly during the plasmon oscillations. Charge transfer plasmon (CTP) frequencies, eigenvectors, quality factors, energy loss in the NPs and in graphene, and the absorption power are aspects that are theoretically studied and numerically calculated. It is shown the CTP frequencies reside in the terahertz range and can be represented as a product of two factors: the Fermi level of graphene and the geometry of the NP complex. The energy losses in the NPs are predicted to be inversely dependent on the radius R of the nanoparticle, while the loss in graphene is proportional to R and the interparticle distance. The CTP quality factors are predicted to be in the range ~ 10 – 100. The absorption power under CTP excitation is proportional to the scalar product of the CTP dipole moment and the external electromagnetic field. The developed theory makes it possible to simulate different properties of CTPs 3–4 orders of magnitude faster compared to the original FEM or the finite-difference time domain method, providing possibilities for predicting the plasmonic properties of very large systems for different applications.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Martyanov O., Yudanov V., Lee R., Volkov N. V., Sablina K. A.
Заглавие : A tool to investigate the spatial magnetic phase separation phenomena in manganites
Место публикации : Phys. Stat. Sol (RRL). - 2007. - Vol. 1, Is.1. - P.R22-R24. - DOI 10.1016/j.jmmm.2006.07.033
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Begunovich L. V., Kovaleva E. A., Korshunov M. M., Shabanov V. F.
Заглавие : Absorption spectra of the purple nonsulfur bacteria light-harvesting complex: A DFT study of the B800 part
Колич.характеристики :7 с
Место публикации : J. Photochem. Photobiol. A: Chem. - 2024. - Vol. 450. - Ст.115454. - ISSN 10106030 (ISSN), DOI 10.1016/j.jphotochem.2023.115454. - ISSN 18732666 (eISSN)
Примечания : Cited References: 42. - This work was supported by the state assignment of the Ministry of Science and Higher Education of the Russian Federation. Authors would like to thank Information Technology Centre, Novosibirsk State University for providing access to their supercomputers. L.V.B. would like to thank Irkutsk Supercomputer Center of SB RAS for providing the access to HPC-cluster «Akademik V.M. Matrosov» (Irkutsk Supercomputer Center of SB RAS, Irkutsk: ISDCT SB RAS; http://hpc.icc.ru, accessed 20.10.2023)
Аннотация: We’ve studied the B800 part of Rhodoblastus acidophilus light-harvesting complex (LH2) by several quantum chemical techniques based on the density functional theory (DFT) and determined the specific method and a minimal reliable model suitable for further studies of the LH2. In addition to bacteriochlorophyll a molecules, the minimal model includes two α and one β chain amino acids. Within the model, we are able to reproduce the contribution of the B800 ring of nine bacteriochlorophyll a molecules to the near infrared Qy absorption band. We also discuss the use of hybrid DFT calculations for precise energy and optical estimations and DFT-based tight binding (DFTB) method for the large-scale calculations. Crucial importance of Hartree-Fock exchange interaction for the correct description of B800 peak position was shown.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Liu Sh., Li L., Qin X., Du R., Sun Y., Xie Sh., Wang J., Molokeev M. S., Xi Sh., Bunzli J.-C. G., Zhou L., Wu M.
Заглавие : Achieving ultra-broadband sunlight-like emission in single-phase phosphors: The interplay of structure and luminescence
Колич.характеристики :9 с
Место публикации : Adv. Mater. - 2024. - Ст.2406164. - Article in press. - ISSN 09359648 (ISSN), DOI 10.1002/adma.202406164. - ISSN 15214095 (eISSN)
Примечания : Cited References: 43. - S.L. and L.L. contributed equally to this work. This work was ﬁnancially supported by grants from the National Natural Science Foundationof China (NSFC, No. 52272174) and its joint project with Guangdong(Nos. U22A20135, U1801253 and U1301242) Province. J. Wang acknowl-edges Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) projects SML2021SP204, SML2023SP215/218/238. The authorsare grateful to Prof. Peter A. Tanner and Prof. Ka-Leung Wong for the indepth communication and valuable advice on the improvement of the manuscriptOpen access funding provided by Ecole Polytechnique Federale de Lausanne
Аннотация: The quest for artificial light sources mimicking sunlight has been a long-standing endeavor, particularly for applications in anticounterfeiting, agriculture, and color hue detection. Conventional sunlight simulators are often cost-prohibitive and bulky. Therefore, the development of a series of single-phase phosphors Ca9LiMg1-xAl2x/3(PO4)7:0.1Eu2+ (x = 0-0.75) with sunlight-like emission represents a welcome step towards compact and economical light source alternatives. The phosphors are obtained by an original heterovalent substitution method and emit a broad spectrum spanning from violet to deep red. Notably, the phosphor with x = 0.5 exhibits an impressive full width at half-maximum of 330 nm. A synergistic interplay of experimental investigations and theory unveils the mechanism behind sunlight-like emission due to the local structural perturbations introduced by the heterovalent substitution of Al3+ for Mg2+, leading to a varied distribution of Eu2+ within the lattice. Subsequent characterization of a series of organic dyes combining absorption spectroscopy with convolutional neural network analysis convincingly demonstrates the potential of this phosphor in portable photodetection devices. Broad-spectrum light source testing empowers the model to precisely differentiate dye patterns. This points to the phosphor being ideal for mimicking sunlight. Beyond this demonstrated application, the phosphor's utility is envisioned in other relevant domains, including visible light communication and smart agriculture.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ivanova O. S., Edel'man I. S., Sventitsky E. S., Serdyuk A. A., Toropova E. S.
Заглавие : Adsorption and Catalytic Properties of Nanoparticles Fe3O4-Ag in Relation to Various Types of Organic Dyes
Коллективы : "Mechanisms of catalytic reactions", International conference, "Механизмы каталитических реакций", международная конференция, Институт катализа им. Г.К. Борескова Сибирского отделения РАН, Институт органической химии им. Н.Д. Зелинского РАН, Московский государственный университет им. М.В. Ломоносова, Сибирское отделение РАН, Центр компетенций НТИ "Водород как основа низкоуглеродной экономики"
Место публикации : XII lnternational conference "Mechanisms of catalvtic reactions": abstracts. - Novosibirsk, 2024. - Ст.PP-09. - P.174-175. - ISBN 978-5-906376-56-5
Примечания : Библиогр.: 2. - РНФ и Красноярский краевой фонд науки, проект 23-22-10025
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanova O. S., Lin, Chun-Rong, Edelman I. S., Svetlitsky E. S., Sokolov A. Е., Zharkov S. M., Sukhachev A. L., Vorobyev S. A., Petrov D. A., Lin, En-Szu
Заглавие : Adsorption properties and catalytic activity of Fe3O4-Ag nanostructures
Колич.характеристики :12 с
Место публикации : Appl. Surf. Sci. - 2024. - Vol. 665. - Ст.160236. - ISSN 01694332 (ISSN), DOI 10.1016/j.apsusc.2024.160236. - ISSN 18735584 (eISSN)
Примечания : Cited References: 48. - The work is supported by the Russian Science Foundation (project no. 23-22-10025, https://rscf.ru/project/ 23-22-10025/) and by the Krasnoyarsk Regional Fund of Science and Technology Support. The electron microscopy and EDS investigations were conducted in the SFU Joint Scientific Center. Magnetic investigations were carried out in the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS"
Аннотация: The morphology and magnetic properties as well as adsorption capacity and catalytic activity of Fe3O4-Ag nanoparticles synthesized by the solvothermal method were studied in dependence on the duration of the thermolysis process (3, 6, and 8 h). X-ray diffraction, transmission electron microscopy, and energy-dispersive spectroscopy measurements showed that the morphology of nanoparticles changed strongly as the duration of thermolysis increased. At 6 and 8 h duration, Fe3O4 nanocrystals grow and assemble into porous spherical globules with an Ag core (samples 2 and 3). These samples demonstrate high magnetization value and very low coercivity. The adsorption capacity of nanoparticles was studied with respect to two organic dyes: cationic methylene blue (MB) and anionic Congo red (CR). The particles showed preferential adsorption of the cationic dye. High catalytic activity towards four dyes: MB, methyl orange (MO), CR, and Rhodamine C (RhC) at the presence of NaBH4 is the remarkable property of these samples. The rate constant of the catalytic reaction was 1.4 min−1. Simultaneous exposure of CR and MO dyes to nanoparticles and NaBH4 caused their irreversible 100 % degradation while in the case of MB and RhC, a transition to their leuco form occurred.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aksenov S. V., Kagan M. Yu.
Заглавие : Majorana modes and Fano resonances in Aharonov–Bohm ring with topologically nontrivial superconducting bridge
Колич.характеристики :22 с
Место публикации : J. Low Temp. Phys. - 2024. - Article in press. - ISSN 00222291 (ISSN), DOI 10.1007/s10909-024-03171-5. - ISSN 15737357 (eISSN)
Примечания : 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
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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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Altunin R. R., Moiseenko E. T., Zharkov S. M.
Заглавие : Kinetics of diffusion and phase formation in a solid-state reaction in Al/Au thin films
Колич.характеристики :10 с
Место публикации : J. Alloys Compd. - 2024. - Vol. 1002. - Ст.175500. - ISSN 09258388 (ISSN), DOI 10.1016/j.jallcom.2024.175500. - ISSN 18734669 (eISSN)
Примечания : Cited References: 83. - This work was supported by the Russian Science Foundation (grant # 22-13-00313)
Аннотация: The kinetics of diffusion and formation of Al-Au intermetallic compounds in a solid-state reaction between layers of aluminum and gold has been studied by the method of in situ electron diffraction. The phase sequence in the solid-state reaction in Al/Au thin films is found to depend on the atomic ratio of aluminum and gold at the initial state. Specifically, with the atomic ratio being Al:Au=2:1, one observes the formation sequence: Al3Au8→AlAu2→Al2Au, while with the ratio Al:Au=1:4, the sequence is Al3Au8→AlAu4. The observed change in the sequence is explained using the theoretical model of EHF (Effective Heat of Formation). The kinetic parameters of the diffusion of gold through the layer of reaction products in the Al/Au thin films have been determined, including the apparent activation energy of the diffusion Ea=1.17 eV and pre-exponential factor D0=120 cm2/s. Based on the data obtained by in situ electron diffraction, the kinetic parameters of the phase formation have been estimated by the Kissinger-Akahira-Sunose method. In addition, the kinetic parameters of the formation of the Al-Au intermetallic compounds have been determined (apparent activation energy Ea, pre-exponential factor A) in the solid-state reaction in the Al/Au thin films, namely, Ea = 0.77 eV, log(A, s−1) = 9 for Al3Au8; Ea = 1.08 eV, log(A, s−1) = 13 for AlAu2; Ea = 1.13 eV, log(A, s−1) = 13 for Al2Au; and Ea = 1.35 eV, log(A, s−1) = 16 for the phase AlAu4. The kinetic parameters of the formation of the AlAu4 phase have been estimated for the first time.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Golovkina E. V., Krylova S. N., Vtyurin A. N., Krylov A. S.
Заглавие : Analyzing the symmetry of the Raman spectra of crystals according to angular dependences
Колич.характеристики :6 с
Место публикации : Bull. Russ. Acad. Sci. Phys. - 2024. - Vol. 88, Is. 5. - P.773-778. - ISSN 10628738 (ISSN), DOI 10.1134/S1062873824706573. - ISSN 19349432 (eISSN)
Примечания : 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
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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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Kharkov A., Sitnikov M.
Заглавие : Regulation of the thermopower and ultrasound by magnetic field in manganese sulfide doped with variable-valence ions
Колич.характеристики :11 с
Место публикации : Eur. Phys. J. Plus. - 2024. - Vol. 139, Is. 3. - Ст.247. - ISSN 21905444 (eISSN), DOI 10.1140/epjp/s13360-024-05032-2
Примечания : Cited References: 50. - The study was supported by a grant from the Russian Science Foundation N 23-22-10016, the Krasnoyarsk Regional Science Foundation. The investigation of microstructural properties of the samples was carried out using equipment’s (SEM and TEM) the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS». The authors are grateful to A.V. Shabanov for the scanning electron microscopy investigations
Аннотация: The effect of cation nonstoichiometry and variable-valence samarium ions on the thermoelectric and structural characteristics of manganese sulfide is studed. Nonstoichiometry leads to a change in the thermopower sign in the antiferromagnetic region in a magnetic field and a decrease in the thermopower in the paramagnetic region. It is shown that the thermopower and Nernst–Ettingshausen coefficient of samarium-substituted manganese sulfide change their signs in the vicinity of structural and electronic transitions established from the thermal expansion coefficient. A decrease in the sound attenuation in a magnetic field is found. A correlation between the temperatures of the change of the sign of the Nernst–Ettingshausen effect and the change in electrosound in a magnetic field is established and explained within the model of carrier diffusion in the phase transition region. The conductivity control by the ultrasound is demonstrated.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krylov A. S., Shipilovskikh S. A., Krylova S. N., Slyusarenko N. V., Timofeeva M., Kenzhebayeva Yu. A., Bachinin S. V., Yushina I. D., Cherepakhin A. V., Shestakov N. P., Nemtsev I. V., Vtyurin A. N., Milichko V. A.
Заглавие : Application of DUT-4 MOF structure switching for optical and electrical humidity sensing
Колич.характеристики :6 с
Место публикации : Dalton Trans. - 2024. - Vol. 53, Is. 8. - P.3459-3464. - ISSN 14779226 (ISSN), DOI 10.1039/D4DT00038B. - ISSN 14779234 (eISSN)
Примечания : Cited References: 37. - The authors acknowledge the support by the state assignment of the Kirensky Institute of Physics FRC KSC SB RAS, also this work was financially supported by the RFBR (Russian Foundation for Basic Research), project no. 21-52-12018. S. A. S. acknowledges the financial support by the Russian Science Foundation (chemical part, Grant No. 22-73-10069 "Design and application of flexible metal organic frameworks for photonics devices"). V.A.M. acknowledges the Priority 2030 Federal Academic Leadership Program Ivan Sergeev (student in ITMO Univ.) for supporting in IV curve analysis. Raman, FTIR and SEM experiments were performed in the Center for Common Use of the Krasnoyarsk Scientific Center SB RAS (Krasnoyarsk, Russia)
Аннотация: The threshold structural transformation of the DUT-4 metal–organic framework (MOF) from an ordered to distorted phase during exposure to ambient conditions has been revealed. The in situ X-ray diffraction analysis, in situ Raman and FTIR spectroscopy, scanning electron microscopy and synchronous thermal analysis have been used for investigation. The reversible effect of exposure time and humidity on such a phase transition has been confirmed. We also demonstrated that the observed phase transition correlated well with changes in the optical and electronic properties of DUT-4, paving the way to a new family of MOF-based phase change materials for optoelectronic applications.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Andryushchenko T. A., Lyashchenko S. A., Lukyanenko A. V., Varnakov S. N., Ovchinnikov S. G.
Заглавие : Auger electron spectroscopy of the air-exposed (Cr0.5Mn0.5)2GaC MAX film surface
Колич.характеристики :6 с
Место публикации : Tech. Phys. Lett. - 2023. - Vol. 49, Is. 7. - P.59-64. - ISSN 10637850 (ISSN), DOI 10.61011/TPL.2023.07.56448.19430. - ISSN 10906533 (eISSN)
Примечания : Cited References: 16. - This study was supported by a grant from the Russian Science Foundation, project № 21-12-00226 (http://rscf.ru/project/21-12-00226/)
Аннотация: We have analyzed chemical bonding of atmospheric oxygen with chromium and manganese on the epitaxial MAX-phase (Cr0.5Mn0.5)2GaC surface using Auger electron spectroscopy combined with ion etching. It was found that the system has a specific anisotropic oxidation where oxygen atoms bind to chromium and manganese ones more actively at the faces of layered MAX phase crystallites in contrast to the (0001) basal plane. At the same time, the dominance of the Mn–O chemical bonding over Cr–O is observed on the latter.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Andryushchenko T. A., Lyashchenko S. A., Varnakov S. N., Lukyanenko A. V., Nemtsev I. V., Yakovlev I. A., Shevtsov D. V., Maximova O. A., Ovchinnikov S. G.
Заглавие : Auger electron spectroscopy of thin Cr2GeC films
Колич.характеристики :7 с
Место публикации : Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 14. - P.1776-1782. - ISSN 0031918X (ISSN), DOI 10.1134/S0031918X2360135X. - ISSN 15556190 (eISSN)
Примечания : Cited References: 33. - The research was supported by the Russian Science Foundation (grant no. 21-12-00226, http://rscf.ru/project/21-12-00226/)
Аннотация: Auger electron spectroscopy was used to determine the phase composition of Cr2GeC MAX phase thin films. A distinctive feature of the formation of carbon-containing MAX phases is the shape of carbon Auger peaks, which is characteristic of metal carbides spectra. Features of the Auger spectra in the presence of secondary phases of chromium germanides are found. Their presence can manifest itself in an increase in the energy of the germanium peaks, which is caused by a chemical shift during the formation of the Cr–Ge bond. Moreover, we have detected the accumulation of electronic charge, which can be explained by the features of the surface morphology.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Avramov P. V., Sorokin P. B., Fedorov A. S., Fedorov D. G., Maeda Y.
Заглавие : Band gap unification of partially Si-substituted single wall carbon nanotubes
Место публикации : Phys. Rev. B. - 2006. - Vol. 74. - P.245417. - DOI 10.1103/PhysRevA.75.067401
Примечания : Библиогр.: 44
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bayukov O. A., Petrakovskii G. A., Savitskii A. F.
Заглавие : Orbital Ordering in CuGeO3
Место публикации : Physics of the Solid State: Nauka, 1998. - Vol. 40, № 9. - С. 1534-1539. - ISSN 1063-7834
Аннотация: The combined effect of the ligand crystal field and the exchange interaction on the Cu2+ cation in CuGeO3 is examined. It is shown that, if the magnitude of the exchange interaction exceeds the splitting of the energy levels of the dx2-y2 and dxy orbitals, then an alternate filling of the d orbitals along a chain (orbital ordering) is possible. This effect creates an antiferromagnetic interaction between Cu2+ pairs in 90° exchange and a doubling of the lattice period. A Jahn-Teller pseudoeffect causes singletization of the ground state of the antiferromagnetic chain of Cu2+ spins. © 1998 American Institute of Physics.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Drokin N. A., Shabanov V. F., Shepov V. N.
Заглавие : Behavior of high-friequency dielectric spectra of liquid crystals nCB and nOCB
Место публикации : Proc. of SPIE. - 2002. - Vol. 4759. - P.282-284. - ISSN 0277-786X. - ISSN 978-0-81948-566-3
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Berggren K.-F., Sadreev A. F.
Заглавие : Simulation of wave chaos using resonant electric network analogues
Место публикации : AIP Conf. Proc. - 2006. - Vol. 834. - С. 307-317
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vladimirova A. V., Murueva A. V., Shershneva A. M., Prudnikova S. V., Shabanov A. V., Shishatskaya E. I.
Заглавие : Biocompatible systems for controlled delivery of antiseptics for topical application
Колич.характеристики :14 с
Место публикации : J. Sib. Fed. Univ. Biol. - 2024. - Vol. 17, Is. 1. - P.19-32. - ISSN 19971389 (ISSN); Журн. СФУ. Биол. - ISSN 23135530 (eISSN)
Примечания : Cited References: 28
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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