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Pinning enhancement by heterovalent substitution in Y1−xRExBa2Cu3O7−δ / Petrov M.I., Gokhfeld Yu.S., Balaev D.A., Popkov S.I., Dubrovskiy A.A., Gokhfeld D.M., Shaykhutdinov K.A. // 25th International Conference on Low Temperature Physics (LT25). – Amsterdam, Netherlands. - August 6-13. – 2008. – PB-Tu130, p.304

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Gokhfeld, Yu. S.; Гохфельд, Ю. С.; Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович
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Aksenov, S. V.
Majorana modes and Fano resonances in Aharonov–Bohm ring with topologically nontrivial superconducting bridge / S. V. Aksenov, M. Yu. Kagan // J. Low Temp. Phys. - 2024, DOI 10.1007/s10909-024-03171-5. - Cited References: 46. - We were inspired by Andreev’s seminal contribution in the superconducting nanophysics—the field which started in fact from Josephson effect and Andreev reflection. M. Yu. Kagan thanks the Program for basic research of the National Research University Higher School of Economics for support. The work was partially carried out within the state assignment of Kirensky Institute of Physics. S.V.A. thanks the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" for support . - Article in press. - ISSN 0022-2291. - ISSN 1573-7357
Кл.слова (ненормированные):
Topological superconductivity -- Majorana modes -- Aharonov–Bohm ring -- Fano resonanse
Аннотация: We study different resonances (first of all of the Fano type) in the interference device formed by the Aharonov–Bohm ring with superconducting (SC) wire in the topologically nontrivial state playing a role of a bridge between top and bottom arms. We analyze Majorana modes on the ends of the SC wire and show that the collapse of the additional Fano resonance, that is initially induced by transport scheme asymmetry, is connected with the increase of the length of the bridge when the binding energy of the Majorana end modes tends to zero. In local transport regime, the Fano resonances are stable against the change of the transport symmetry. The reasons of both collapse and sustainability are analyzed using a spinless toy model including the Kitaev chain.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, Russia, 660036
National Research University Higher School of Economics, Myasnitskaya Street 20, Moscow, Russia, 101000
P.L. Kapitza Institute for Physical Problems, Russian Academy of Sciences, Kosygin Street 2, Moscow, Russia, 119334

Доп.точки доступа:
Kagan, M. Yu.; Аксенов, Сергей Владимирович
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Temperature Raman study of Li4Ti5O12 and ambiguity in the number of its bands / A. A. Nikiforov, A. S. Krylov, S. N. Krylova [et al.] // J. Raman Spectrosc. - 2024. - Vol. 55, Is. 3. - P. 406-415, DOI 10.1002/jrs.6641. - Cited References: 51. - The research was funded by the Russian Science Foundation (project No 22-22-00350, https://rscf.ru/project/22-22-00350) . - ISSN 0377-0486. - ISSN 1097-4555
Кл.слова (ненормированные):
defects -- distortions -- lithium titanate -- lithium titanium oxide -- spinel structure
Аннотация: The two primary physical methods for identifying lithium titanate, a negative electrode material used commercially, are X-Ray diffraction and Raman spectroscopy. Although there are many publications on this topic, they are focused mainly on chemistry, so there are still some points that require clarification from a physical and methodological point of view. Difference of experimentally observed and theoretically predicted Raman spectra was explained through a combination of experiments and computations. The work comprises experiments and computations to explain why there are different numbers of predicted and observed Raman-active bands. Our low-temperature study and the analysis of thermal shifts during heating led us to conclude that the approach with surplus bands is advantageous and we recommend using major F2g band shifts to estimate the sample heating.

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Держатели документа:
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, Russia
L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russia
Independent Researcher, Ekaterinburg, Russia

Доп.точки доступа:
Nikiforov, A. A.; Krylov, A. S.; Крылов, Александр Сергеевич; Krylova, S. N.; Крылова, Светлана Николаевна; Gorshkov, V. S.; Pelegov, D. V.
}
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Synthesis of Ni nanoclusters supported on diamond by plasma technique and their electrochemical properties / N. S. Nikolaev, V. G. Isakova, N. G. Vnukova [et al.] // Diam. Relat. Mater. - 2024. - Vol. 142. - Ст. 110844, DOI 10.1016/j.diamond.2024.110844. - Cited References: 35 . - ISSN 0925-9635. - ISSN 1879-0062
Кл.слова (ненормированные):
High pressure – high temperature (HTHP) diamond -- Nickel plasma -- Cyclic voltammetric -- Electrocatalytic activity -- Methanol -- Paracetamol
Аннотация: In this study, particles of synthetic undoped diamond (DN) obtained via the high pressure – high temperature method were coated with a nickel shell using metallic nickel plasma in a two-jet plasma generator with gas vortex and magnetic flux stabilization. Through the use of scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy, we observed the formation of a nickel diamond composite with a core-shell structure, where DN serves as the core and Ni nanoclusters form the shell (DN@Ni). The results of voltammetric analysis indicated that DN@Ni, when deposited on a graphite electrode, exhibited significant electrocatalytic activity in the oxidation of methanol and paracetamol in an alkaline electrolyte.

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Держатели документа:
Kirensky Institute of Physics, FSBSI "Federal Research Center "Krasnoyarsk Science Center SB RAS", Akademgorodok 50/38, Krasnoyarsk 660036, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Academician Kirensky str., 28, Krasnoyarsk 660074, Russia
Institute of Chemistry and Chemical Technology of the Siberian Branch of the Russian Academy of Sciences, FSBSI "Federal Research Center "Krasnoyarsk Science Center SB RAS", Akademgorodok 50/24, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Nikolaev, N. S.; Николаев, Никита Сергеевич; Isakova, V. G.; Исакова, Виктория Гавриловна; Vnukova, N. G.; Внукова, Наталья Григорьевна; Elesina, V. I.; Елесина, Виктория Игоревна; Glushenko, G. A.; Глущенко, Гарий Анатольевич; Tomashevich, Y. V.; Томашевич, Евгений Владимирович; Churilov, G. N.; Чурилов, Григорий Николаевич
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Optical thermometer based on efficient near-infrared dual-emission of Cr3+ and Ni2+ in magnetoplumbite structure / Qianqian Zhang, Guogang Li, Guangzhi Li [et al.] // Adv. Optical Mater. - 2024. - Vol. 12, Is. 1. - Ст. 2301429, DOI 10.1002/adom.202301429. - Cited References: 22. - This work was financially supported by the National Science and Technology Major Project (2022YFB3503800), the Projects for Science and Technology Development Plan of Jilin Province (20210402046GH), the National Natural Science Foundation of China (NSFC No. 51932009, 51720105015, 51929201, 52072349, 52172166), the Natural Science Foundation of Zhejiang Province (LR22E020004), and the Project funded by China Postdoctoral Science Foundation (2022TQ0365). M.S. Molokeev acknowledges the support by the Ministry of Science and Higher Education of Russian Federation (Project No. FSRZ-2023-0006) . - ISSN 2195-1071
Кл.слова (ненормированные):
energy transfers -- NIR dual emissions -- NIR-LED -- optical temperature sensing
Аннотация: Recently, an optical thermometer based on the dual-emitting fluorescent intensity ratio (FIR) in the visible light (VIS) region has achieved great development. However, there is very little progress in thermometers from NIR light. In this work, a novel optical thermometer based on highly efficient NIR dual-emission of Cr3+ and Ni2+ in LaZnGa11O19 (LZG) with a magnetoplumbite structure is designed. Utilizing energy transfer from Cr3+ to Ni2+, the dual-emission shows a wide coverage in the 650–1600 nm region, covering the NIR I and II windows, respectively. The as-reported LZG:0.3Cr3+ and LZG:0.3Cr3+,0.01Ni2+ phosphors can reach internal/external quantum efficiency (IQE/EQE) of 94%/64% and 77%/53%, respectively. The electroluminescence property and potential applications in spectroscopic analysis, night-vision, and bioimaging of fabricated NIR-LED with LZG:0.3Cr3+,0.01Ni2+ have also been investigated. In addition, the designed ratiometric optical thermometer responds to wide temperature ranges (100-175 K, 200–475 K) and shows a maximum relative sensitivity value (Sr) of 2.4% K−1 at 475 K. The optical performance of absorption in the red region and emission in the NIR region enables the LZG:0.3Cr3+,0.01Ni2+ to become a candidate for NIR optical thermometers in biotechnological applications.

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Держатели документа:
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei2 30026, China
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan4 30074, China
Zhejiang Institute, China University of Geosciences, Hangzhou 311305, China
College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, P. R. China
International Research Center of Spectroscopy and Quantum Chemistry—IRCSQC, Siberian Federal University, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Zhang, Qianqian; Li, Guogang; Li, Guangzhi; Liu, Dongjie; Dang, Peipei; Qiu, Lei; Lian, Hongzhou; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lin, Jun
}
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Room temperature ferromagnetism in graphene/SiC(0001) system intercalated by Fe and Co / S. O. Filnov, D. A. Estyunin, I. I. Klimovskikh [et al.] // Phys. Status Solidi - Rapid Res. Lett. - 2024. - Vol. 18, Is. 3. - Ст. 2300336, DOI 10.1002/pssr.202300336. - Cited References: 76. - This research was funded by the Ministry of Science and Higher Education of the Russian Federation grant no. 075-15-2020-797 (13.1902.21.0024) . - ISSN 1862-6254. - ISSN 1862-6270
Аннотация: The utilization of graphene on silicon carbide (SiC) substrates holds substantial promise for advancements in spintronics and nanoelectronics. Furthermore, incorporating magnetic metals provides an optimal framework for probing fundamental physical phenomena. The approach to developing such systems is in situ intercalation of graphene with magnetic metals. Herein, the electronic structure is analyzed and the magnetic properties of the system are synthesized by the thermal decomposition of 6H-SiC(0001) surface and subsequent intercalation of graphene with cobalt (Co) and iron (Fe) atoms. X-ray photoemission spectroscopy and low-energy electron diffraction are employed to control the synthesis and metal intercalation processes. The morphological characteristics of the synthesized system are studied by means of atomic force microscopy. The findings derived from magneto-optic Kerr effect measurements reveal a homogeneous ferromagnetic ordering at room temperature. Angle-resolved photoemission spectroscopy is used to ascertain the impact of intercalation on graphene's electronic structure. The results of this study are essential for the development of graphene-based spintronics and nanoelectronic devices as well as for fundamental studies in magnetic graphene systems.

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Держатели документа:
Saint Petersburg State University, Saint Petersburg, 198504, Russian Federation
Donostia International Physics Center, Donostia-San Sebastian, 20018, Spain
Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Kol'tsovo, 630559, Russian Federation
National Research Center “Kurchatov Institute”, Moscow, 123182, Russian Federation

Доп.точки доступа:
Filnov, S. O.; Estyunin, D. A.; Klimovskikh, I. I.; Estyunina, T. P.; Golyashov, V. 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; Rybkina, A. A.; Vilkov, O. Yu.; Shikin, A. M.; Tereshchenko, O. E.; Chumakov, R. G.; Lebedev, A. M.; Rybkin, A. G.
}
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Relaxation of the trapped magnetic flux in a mesoscopic HTS with artificial pinning in the form of submicron holes / A. N. Maksimova, D. M. Gokhfeld, A. N. Moroz, V. A. Kashurnikov // Chin. J. Phys. - 2024. - Vol. 88. - P. 493-502, DOI 10.1016/j.cjph.2023.11.030. - Cited References: 31. - V.A. Kashurnikov and A.N. Maksimova were supported by the Ministry of Science and Higher Education of the Russian Federation (state task project No. FSWU-2023-0031), A.N. Moroz was supported by MEPhI Program Priority 2030 . - ISSN 0577-9073. - ISSN 2309-9097
Кл.слова (ненормированные):
High-temperature superconductor -- trapped flux -- pinning -- relaxation
Аннотация: Vortex relaxation has been studied in a microsized HTS with various distributions of artificial pinning in the form of submicro-holes. It has been shown that, in some cases, for a superconductor with dimensions up to several micrometers, the time dependences of the trapped magnetic field do not correspond with the collective creep model. The dependences of the trapped-field relaxation rate and vortex activation energy on the magnetizing field (up to 0.5 T) and temperature (up to 50 K) have been obtained. It has been shown that the presence of submicro-holes slightly increases the relaxation rate, mainly due to the decrease in the number of random nanosized pinning centers.

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Держатели документа:
National Research Nuclear University MEPhI, Moscow, 115409 Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036 Russia
Siberian Federal University, Krasnoyarsk, 660041 Russia

Доп.точки доступа:
Maksimova, A.N.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Moroz, A.N.; Kashurnikov, V.A.
}
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On the use of dual-polarized multi-angular observations of P-band brightness temperature for soil moisture profile retrieval in thawed mineral soil / K. V. Muzalevskiy, J. P. Walke, F. Brakhasi [et al.] // Int. J. Remote Sens. - 2024. - Vol. 45, Is. 5. - P. 1498-1521, DOI 10.1080/01431161.2024.2313993. - Cited References: 37. - The work was supported by the State assignment of Kirensky Institute of Physics [FWES-2021-0034]; Australian Research Council funding [DP170102373 and LE150100047]. The work was carried out within the state assignment of Kirensky Institute of Physics and the Australian Research Council funding (DP170102373 and LE150100047) that was used to collect the P-band data . - ISSN 0143-1161. - ISSN 1366-5901
Кл.слова (ненормированные):
Microwave remote sensing -- radiometry -- P-band -- Burke mode -- moisture and temperature retrieval depth -- soil moisture profile
Аннотация: This article investigated the possibility of remotely sensing the soil moisture profile in thawed soil from multi-angular dual-polarized brightness temperature (TB) observations at P-band frequencies of 750 MHz and 409 MHz using a modified Burke model. Moreover, it was found that an excellent agreement (coefficient of determination R2 = 0.999 and root-mean-square error (RMSE) no more than RMSE = 0.6 K) could be achieved between the Njoku coherent brightness temperature model and the modified Burke model by introducing a reflectivity from the air-soil interface that takes into account the phases of the multiple re-reflected waves in the underlying layers. Based on the modified Burke model, the depths from which apparent moisture and temperature could be retrieved in a dielectrically-inhomogeneous, non-isothermal soil were investigated, being approximately ten times less than the depth for which apparent soil temperature could be retrieved. In general, the thickness of the emitting layer depends on the TB look angle and polarization, along with the moisture and temperature profiles of the soil. It was also shown that due to the effect of the Brewster angle, the H-polarization of TB was twice as sensitive (4 K/1%) to changes in volumetric soil moisture than V-polarization (1.9 K/1%). Based on multi-angular (10°-50°) observations of TB at H- and V-polarizations, a method of moisture profile retrieval in the top 5–15 cm soil (depending on surface moisture) was proposed using an exponential fitting function, the parameters of which are found in the course of solving the inverse problem. A decrease in the sensing frequency from 750 MHz to 409 MHz makes it possible to increase the accuracy of soil moisture profiles retrieval by a factor of two, being from RMSE = 1.6% (R2 = 0.946) to RMSE = 0.85% (R2 = 0.982) in the top 15 cm layer of soil. The conducted investigation shows the promise of using P-band observations of TB for soil moisture profile retrieval.

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Держатели документа:
Laboratory of Radiophysics of the Earth Remote Sensing, Kirensky Institute of Physics Federal Research Center KSC Siberian Branch Russian Academy of Sciences, Krasnoyarsk, Russia
Department of Civil Engineering, Monash University, Clayton, Australia
Yangtze Institute for Conservation and Development, Hohai University, Nanjing, China

Доп.точки доступа:
Muzalevskiy, K. V.; Музалевский, Константин Викторович; Walke, J. P.; Brakhasi, F.; Ye, N.; Wu, X.; Shen, X.
}
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Strain-induced charge ordering above room temperature in rare-earth manganites / Yu. Samoshkina, M. Rautskii, D. Neznakhin [et al.] // Dalton Trans. - 2024. - Vol. 53, Is. 12. - P. 5721-5731, DOI 10.1039/D3DT04299E. - Cited References: 52 . - ISSN 1477-9226. - ISSN 1477-9234
Аннотация: Most known mixed manganites containing rare-earth elements demonstrate a pronounced charge ordering (CO) state below room temperature. The behavior of the magnetic susceptibility and electronic magnetic resonance of polycrystalline Pr1−xSrxMnO3/YSZ (x = 0.2 and x = 0.4) films without a pronounced texture indicates the formation of the CO phase in the samples at temperatures close to and above room temperature. Moreover, this phase manifests itself with a typical sign of martensitic transformation.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Institute of Natural Sciences and Mathematics, Ural Federal University, Yekaterinburg 620002, Russia
National University of Science and Technology (NUST “MISIS”), Moscow 119991, Russia
Research and Education Center “Smart Materials and Biomedical Applications”, Immanuel Kant Baltic Federal University, Kaliningrad 236041, Russia
Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia
Moscow Technical University of Communication and Informatics, Moscow 111024, Russia

Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Neznakhin, D.; Stepanova, E.; Andreev, N.; Chichkov, V.; Zaikovskii, V.; Chernichenko, A.
}
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10.

Temperature/component-dependent luminescence in lead-free hybrid metal halides for temperature sensor and anti-counterfeiting / G. Zhou, Y. Wang, Y. Mao [et al.] // Adv. Funct. Mater. - 2024. - Ст. 2401860, DOI 10.1002/adfm.202401860. - Cited References: 89. - G.J.Z. and Y.T.W. contributed equally to this work. This work was supported by the National Natural Science Foundation of China (No.52202177, 22271211), Fundamental Research Program of Shanxi Province (No.20210302124054), Science and Technology Innovation Project of Colleges and Universities in Shanxi Province (No.2021L262), 1331 Project of Shanxi Province, Postgraduate Innovation Project of Shanxi Province (No.2023KY462), and supported by the Ministry of Science and High Education of Russian Federation (No.FSRZ-2023-0006). The authors would like to thank Prof. Haijun Jiao, Leibniz-Institut für Katalyse e.V., Germany, for the theoretical support on the electron-transition mechanism . - Article in press. - ISSN 1616-301X. - ISSN 1616-3028
Кл.слова (ненормированные):
electron-transition -- hybrid metal halides -- optical-functional applications -- self-trapped excitons -- tunable photoluminescence
Аннотация: Hybrid metal halides (HMHs) have emerged as a promising platform for optically functional crystalline materials, but it is extremely challenging to thoroughly elucidate the electron transition coupled to additional ligand emission. Herein, to discover sequences of lead-free HMHs with distinct optically active metal cations are aimed, that is, Sb3+ (5s2) with the lone-pair electron configuration and In3+ (4d10) with the fully-filled electron configuration. (Me2NH2)4MCl6·Cl (Me = −CH3, M = Sb, In) exhibits the superior temperature/component-dependent luminescence behaviors resulting from the competition transition between triplet-states (Tn-S0) self-trapped excitons (STEs) of inorganic units and singlet-state (S1-S0) of organic cations, which is manipulated by the optical activity levels of [SbCl6]3− and [InCl6]3−. The bonding differences between Sb3+/In3+ and Cl− in terms of electronic excitation and hybridization are emphasized, and the different electron-transition mechanisms are established according to the PL spectra at the extreme temperature of 5 to 305 K and theoretical calculations. By fine-tuning the B-site Sb3+/In3+ alloying, the photoluminescence quantum yield (PLQY = 81.5%) and stability are optimized at 20% alloying of Sb3+. This research sheds light on the rules governing PL behaviors of HMHs, as well as exploring the optical-functional application of aviation temperature sensors and access-control systems.

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Держатели документа:
Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, P. R. China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
International Research Center of Spectroscopy and Quantum Chemistry-IRC SQC, Siberian Federal University, Krasnoyarsk 660041, Russia
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, Guangdong 510641, P. R. China
College of Chemistry & Chemical Engineering, Key Laboratory of Interface Science and Engineering in Advanced Material, Ministry of Education, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China

Доп.точки доступа:
Zhou, G.; Wang, Y.; Mao, Y.; Guo, C.; Zhang, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Z.; Zhang, X.-M.
}
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