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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Shakhura I. E., Vyunishev A. M., Zaitsev A. I., Zamkov A. V.
Заглавие : Nonlinear optical processes in randomized domain structures of strontium tetraborate
Место публикации : International Conference "Laser Optics 2008" June 23-28, 2008, St.Petersburg, Russia, p.55
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Chukalina E., Popova M., Bezmaternykh L. N.
Заглавие : Spectroscopic studies of the mixed system NdxGd1-xFe3(BO3)4
Коллективы : International Conference on Physics of Optical Materials and Devices
Место публикации : 2nd International Conference on Physics of Optical Materials and Devices (ICOM 2009)/ International Conference on Physics of Optical Materials and Devices (2nd ; 2009 ; AUG ; 27-30 ; Herceg Novi, Montenegro). - С. 55
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Gudim I. A., Krylov A. S, Temerov V. E.
Заглавие : Luminescence of manganese ions in yttrium aluminium borate
Место публикации : 15th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, Lyon, 2008, p.482
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Malakhovskii A. V., Edelman I. S., Sokolov A. Е., Sukhachev A. L., Temerov V. L., Gnatchenko S. L., Kachur I. S., Piryatinskaya V. G., Valiev U. V.
Заглавие : Optical absorption and luminescence of Tm3+ and Yb3+ ions in huntite structure
Место публикации : Республиканская конференция «Оптические методы в современной физике», Ташкент, Узбекистан, 2008, с. 33-35
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popov A. K., Myslivets S. A., Shalaev V. M.
Заглавие : Backward-wave optical parametric amplification and mirrorless oscillations in negative-index materials
Место публикации : APS March Meeting, March 10-14, 2008; New Orleans, Louisiana; Bulletin of the American Physical Society Series II, 2008. - V. 53, № 2, Abstract V28.00002, p.476
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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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Guan M., Hao J., Qiu L., Molokeev M. S., Ning L., Dai Zh., Li G.
Заглавие : Two-dimensional hybrid perovskite with high-sensitivity optical thermometry sensors
Колич.характеристики :8 с
Место публикации : Inorg. Chem. - 2024. - Vol. 63, Is. 8. - P.3835-3842. - ISSN 00201669 (ISSN), DOI 10.1021/acs.inorgchem.3c04140. - ISSN 1520510X (eISSN)
Примечания : Cited References: 37. - This work was supported by the National Natural Science Foundation of China (Grant Nos. 52072349, 52172162, 12374386, and 11974022). Z.D. acknowledges support from the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (No.162301202610), the Natural Science Foundation of Guangdong Province (2022A1515012145), and Shenzhen Science and Technology Program(JCYJ20220530162403007). G.L. acknowledges support from the Natural Science Foundation of Zhejiang Province (LR22E020004). M.M. acknowledges the support from the Ministry of Science and High Education of Russian Federation (Project No. FSRZ-2023-0006)
Аннотация: Optical thermometry has gained significant attention due to its remarkable sensitivity and noninvasive, rapid response to temperature changes. However, achieving both high absolute and relative temperature sensitivity in two-dimensional perovskites presents a substantial challenge. Here, we propose a novel approach to address this issue by designing and synthesizing a new narrow-band blue light-emitting two-dimensional perovskite named (C8H12NO2)2PbBr4 using a straightforward solution-based method. Under excitation of near-ultraviolet light, (C8H12NO2)2PbBr4 shows an ultranarrow emission band with the full width at half-maximum (FWHM) of only 19 nm. Furthermore, its luminescence property can be efficiently tuned by incorporating energy transfer from host excitons to Mn2+. This energy transfer leads to dual emission, encompassing both blue and orange emissions, with an impressive energy transfer efficiency of 38.3%. Additionally, we investigated the temperature-dependent fluorescence intensity ratio between blue emission of (C8H12NO2)2PbBr4 and orange emission of Mn2+. Remarkably, (C8H12NO2)2PbBr4:Mn2+ exhibited maximum absolute sensitivity and relative sensitivity values of 0.055 K–1 and 3.207% K–1, respectively, within the temperature range of 80–360 K. This work highlights the potential of (C8H12NO2)2PbBr4:Mn2+ as a promising candidate for optical thermometry sensor application. Moreover, our findings provide valuable insights into the design of narrow-band blue light-emitting perovskites, enabling the achievement of single-component dual emission in optical thermometry sensors.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yang Ch., Zheng D., Zou X., Dai X., Tang B., Molokeev M. S., Zhang X., Zhang H., Liu Y., Lei B.
Заглавие : Highly-efficiency far-red emission in Cr3+ activated Ca1.8Mg1.2Al2Ge3O12 toward plant precise lighting
Колич.характеристики :9 с
Место публикации : Adv. Opt. Mater. - 2024. - Ст.2303235. - Article in press. - ISSN 21951071 (eISSN), DOI 10.1002/adom.202303235
Примечания : Cited References: 48. - The work was supported by the National Natural Science Foundations of China (No. 12274144), the Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (No. 2023KJ122), the Key Realm R&D Program of Guangdong Province (No. 2021B0707010003), the Guangdong Provincial Science and Technology Project (No. 2022A1515010229), and the Project of GDUPS (2018) for Prof. Bingfu LEI
Аннотация: Far-red (FR) region (beyond 700 nm) lighting sources possess special potential for plant lighting. However, it remains a challenge to obtain high-performance Cr3+-doped FR phosphors. This study developed a FR phosphor, Ca1.8Mg1.2Al2Ge3O12:Cr3+ (CMAGG: Cr3+), using the cation substitution strategy. Under 438 nm blue light excitation, the phosphors display FR emission centered at 720 nm with a full width at half maximum (FWHM) of 91 nm. Benefit from the favorable match with the FR phytochrome (Pfr), the phosphor is combined with InGaN blue light chips to create a FR phosphor-converted light-emitting diode (pc-LED), which is used in Italian lettuce growth experiments and it results shown in a 15% increase in fresh weight and a 6.5% increase in dry weight. Notably, supplemental FR light modulated its growth morphology. The results of this study will be useful for further research on novel Cr3+-doped FR phosphors to meet the precise spectral requirements for plant growth.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dai X., Zou X., Zhang H., Chen W., Yang C., Molokeev M. S., Xia Z., Liu Y., Zhang X., Zheng M., Lei B.
Заглавие : Novel Cr3+-doped garnet phosphor with broadband efficient far-red emission for photochrome matching plant-lighting
Колич.характеристики :9 с
Место публикации : Adv. Opt. Mater. - 2024. - Vol. 12, Is. 11. - Ст.2302380. - ISSN 21951071 (eISSN), DOI 10.1002/adom.202302380
Примечания : Cited References: 54. - The work was supported by the National Natural Science Foundations of China (No. 12274144), the Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (No. 2023KJ122), the Key Realm R&D Program of Guangdong Province (No. 2021B0707010003), the Guangdong Provincial Science and Technology Project (No. 2022A1515010229), and the Project of GDUPS (2018) for Prof. Bingfu LEI
Аннотация: Cr3+-doped phosphors are highly recognized in various fields for their remarkable luminous efficiency and spectral flexibility, including modern agriculture and horticulture. However, the shortage of suitable Cr3+-doped phosphors for far-red LED devices has inhibited their popularization in plant lighting. Herein, an innovative Cr3+-doped phosphor Ca2YAl3Ge2O12:Cr3+ (CYAG:Cr3+), achieving a broad far-red emission at 770 nm upon 450 nm blue light excitation is designed. The optimal CYAG:Cr3+ phosphor exhibits a high internal quantum yield of 78.2% and low thermal-quenching behavior of 85%@373 K. Thus, the fabricated phosphor-converted LEDs (pc-LEDs) for plant far-red lighting have a high output power of 33.3 mW and photovoltaic conversion efficiency of 11.5% at 100 mA. The potential of CYAG:Cr3+ in plant lighting is assessed by supplementing the far-red lighting of Italian lettuce with fabricated pc-LEDs, and the biomass of Italian lettuce is significantly increased by 33%. The successful development of CYAG:Cr3+ phosphors provides a high-quality option for plant far-red light devices and further stimulates the development of new Cr3+-doped plant-lighting phosphors.
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10.

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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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhang, Qianqian, Li, Guogang, Li, Guangzhi, Liu, Dongjie, Dang, Peipei, Qiu, Lei, Lian, Hongzhou, Molokeev M. S., Lin, Jun
Заглавие : Optical thermometer based on efficient near-infrared dual-emission of Cr3+ and Ni2+ in magnetoplumbite structure
Колич.характеристики :9 с
Место публикации : Adv. Optical Mater. - 2024. - Vol. 12, Is. 1. - Ст.2301429. - ISSN 21951071 (eISSN), DOI 10.1002/adom.202301429
Примечания : 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)
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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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Glazkova D. A., Estyunin D. A., Tarasov A. S., Kosyrev N. N., Komarov V. A., Patrin G. S., Golyashov V. A., Tereshchenko O. E., Kokh K. A., Koroleva A. V., Shikin A. M.
Заглавие : Investigation of surface magnetism in systems based on MnBi2Te4 using the magneto-optical Kerr effect
Колич.характеристики :6 с
Место публикации : Crystallogr. Rep. - 2024. - Vol. 69, Is. 1. - P.79-84. - ISSN 10637745 (ISSN), DOI 10.1134/S1063774523601296. - ISSN 1562689X (eISSN)
Примечания : 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"
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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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : 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., Pavlov D. I., Fedin V. P., Potapov A. S., Milichko V. A.
Заглавие : Light-driven anisotropy of 2D metal-organic framework single crystal for repeatable optical modulation
Колич.характеристики :11 с
Место публикации : Commun. Mater. - 2024. - Vol. 5, Is. 1. - Ст.48. - ISSN 26624443 (eISSN), DOI 10.1038/s43246-024-00485-5
Примечания : 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
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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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Isaenko L., Dong L., Melnikova S. V., Molokeev M. S., Korzhneva K. E., Krinitsin P. G., Kurus A. F., Samoshkin D. A., Belousov R. A., Lin Zh.
Заглавие : Phase transitions and nonlinear optical property modifications in BaGa4Se7
Колич.характеристики :8 с
Место публикации : Inorg. Chem. - 2024. - Vol. 63, Is. 21. - P.10042-10049. - ISSN 00201669 (ISSN), DOI 10.1021/acs.inorgchem.4c01341. - ISSN 1520510X (eISSN)
Примечания : Cited References: 27. - This work was supported by the National Natural Science Foundation of China, grant no. 22133004 (first-principles studies), the Ministry of Education and Science of the Russian Federation, grant FSUS-2020-0036 (crystal growth, crystal structure analysis, and band gap measurement), and partly done on the state assignment of IGM SB RAS no. 122041400031-2 (composition chemical analysis and SHG coefficient measurements)
Аннотация: Phase transitions can change the crystal structure and modify the physical properties of crystals. In this work, we investigate the phase transition behavior in BaGa4Se7, an important middle infrared (mid-IR) nonlinear optical (NLO) crystal, in the temperature range from room temperature to 1173 K. Interestingly, the BaGa4Se7 crystal undergoes a reversible ferroelastic phase transition at T = 528 K, resulting in the presence of a newly discovered phase (γ-phase) at the higher temperature. The experimental temperature dependence of optical birefringence, as well as the first-principles birefringence and NLO coefficients, reveals that the γ-phase exhibits larger birefringence and better NLO properties compared with those of the low-temperature phase (α-phase). This work demonstrates that phase-transition-induced structural modification can improve the mid-IR NLO properties, which would provide an effective avenue to obtain materials with good optoelectronic performance.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhou G., Wang Y., Mao Y., Guo C., Zhang J., Molokeev M. S., Xia Z., Zhang X.-M.
Заглавие : Temperature/component-dependent luminescence in lead-free hybrid metal halides for temperature sensor and anti-counterfeiting
Колич.характеристики :9 с
Место публикации : Adv. Funct. Mater. - 2024. - Ст.2401860. - Article in press. - ISSN 1616301X (ISSN), DOI 10.1002/adfm.202401860. - ISSN 16163028 (eISSN)
Примечания : 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
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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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chernyshev V. A., Ruseikina A. V., Grigoriev M. V., Krylova S. N., Safin D. A.
Заглавие : First-principles calculations to investigate optical, phonon and electronic properties of quaternary sulfides SrRECuS3 (RE = La, Nd, Tm)
Колич.характеристики :7 с
Место публикации : Inorg. Chem. Commun. - 2024. - Vol. 165. - Ст.112449. - ISSN 13877003 (ISSN), DOI 10.1016/j.inoche.2024.112449. - ISSN 18790259 (eISSN)
Примечания : Cited References: 43. - This work was supported by The Ministry of Science and Higher Education of the Russian Federation (project No. FEUZ-2023-0017)
Аннотация: The structure and properties of three layered heterometallic quaternary sulfides SrLaCuS3, SrNdCuS3 and SrTmCuS3 were studied for the first time using first-principles calculations in the stoichiometric and nonstoichiometric approximations. The applied DFT-based computations were performed using a hybrid functional with the contribution of nonlocal exchange in the Hartree-Fock formalism. It was revealed that the nonstoichiometry of SrLaCuS3 and SrNdCuS3 must be considered for modeling phonon spectra, elastic properties and band gaps. The wavenumbers and types of the Raman and "silent" modes at the Г-point were determined. From the analysis of displacement vectors, the degree of participation of ions in each mode was determined. The elastic constants and elastic moduli of the reported sulfides were calculated.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ma Y., Liao W., Quan B., Kong Z., Molokeev M. S., Zolotov A., Cheng M., Chen X., Zhou Zh., Xia M.
Заглавие : Solid solution structural engineering enhances the luminescence of SrMgAl10O17:Cr3+ for agricultural lighting
Колич.характеристики :7 с
Место публикации : J. Lumin. - 2024. - Vol. 270. - Ст.120553. - ISSN 00222313 (ISSN), DOI 10.1016/j.jlumin.2024.120553. - ISSN 18727883 (eISSN)
Примечания : Cited References: 46. - The authors would like to gratefully acknowledge funds from the Key R & D Projects in Hunan Province (2021SK2047, 2022NK2044), the Wangcheng Science and Technology Plan (KJ221017), the Science and Technology Innovation Program of Hunan Province (2022WZ1022). The work was supported by the Ministry of Science and Higher Education of the Russian Federation as part of the World-class Research Center program: ‘‘Advanced Digital Technologies’’, contract no. 075-15-2020-935. Research Foundation of Education Bureau of Hunan Province, China (22B0211)
Аннотация: Lead-free non-rare earth oxide phosphors have attracted wide attention due to their environmental protection, sustainability, and potential to replace halides and fluorides in the field of plant lighting. Among them, the Cr3+-excited aluminate phosphor exhibits high brightness, high thermal stability, and far red to near-infrared (NIR) emission due to the influence of the crystal field strength (CFS). This property gives rise to a variety of strategies used to modulate the CFS, for example, single ion substitution, chemical unit co-substitution, etc. Here, we chose the substitution of a single ion, with [BaO6] gradually replacing [SrO6] to form a solid solution. Their structural characteristics and the local structure of Cr3+ are studied and discussed. The device is packaged to evaluate the feasibility of the material for practical application. The prepared phosphor had a bright far-red light emission of 693 nm under blue light excitation, and this spectrum strongly matched the absorption of plant phytochrome PFR. This work provides the design principle of far red light emission activated by Cr3+ aluminate solid solution, which can inspire further research on pc-LED lights for plant lighting.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bukhanov E. R., Shikhov V. N., Velichko V. V., Lipshin A. G., Surin N. A.
Заглавие : Influence of growth environment on structural and optical characteristics of higher plants
Колич.характеристики :5 с
Коллективы : International Advances in Applied Physics and Materials Science Congress and Exhibition
Место публикации : AIP Conf. Proc. - 2024. - Vol. 2924: Proceedings of the 3rd International Advances in Applied Physics and Materials Science Congress & Exhibition, Is. 1. - Ст.040003. - ISSN 0094243X (ISSN), DOI 10.1063/5.0181655. - ISSN 15517616 (eISSN). - ISSN 978-073544852-0 (ISBN)
Примечания : Cited References: 26
Аннотация: Two barley samples were taken for the study – one grown in the field and the other in a special chamber under intensive light. Chloroplasts structure was obtained during electron microscopy process. The results showed that the maximum quantum yield of photosystem II in both samples was in the range of values typical for normal physiological state of plants. At the same time, electron transport speed comparison shows that electrons are transferred 1.7 times faster in the vegetation chamber compared to field environment. Such difference is confirmed by the results of microscopy performed with flag leaves tissue samples of barley grown under intensive light in a chamber and in the field. A grana structure significantly denser and better organized was observed in chloroplasts of barley grown in chamber. This study shows a clear connection between the environment, the ordering of thylakoid structures and fluorescent indicators of photosynthesis.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Grigorchenko V.M., Molokeev M. S., Oreshonkov A. S., Aleksandrovsky A. S., Kertman A.V., Abulkhaev M.U., Mereshchenko A.S., Yurev I.O., Shulaev N.А., Kamaev D.N., Elyshev A.V., Andreev O.V.
Заглавие : Synthesis and properties of the NdSF compound, phase diagram of the NdF3–Nd2S3 system
Колич.характеристики :9 с
Место публикации : J. Solid State Chem. - 2024. - Vol. 333. - Ст.124640. - ISSN 00224596 (ISSN), DOI 10.1016/j.jssc.2024.124640. - ISSN 1095726X (eISSN)
Примечания : Cited References: 48. - This research was funded by the Tyumen Oblast Government as part of the West-Siberian Interregional Science and Education Center’s project No. 89-DON (3)The studies ab initio simulation of electron band structure, analysis of optical properties, XRD analysis was partially supported by "Priority-2030" program for the Siberian Federal University, and the state assignment of Kirensky Institute of Physics
Аннотация: The NdF3–Nd2S3 system attracts attention of researchers due to the possibility of using LnSF compounds (Ln = rare earth element) as possible new p- and n-type materials. The samples of this system were synthesized from NdF3 and Nd2S3. The NdSF compound belongs to the PbFCl structural type, P4/nmm space group, unit cell parameters: a = 3.9331(20) Å, c = 6.9081(38) Å. The experimentally determined direct and indirect NdSF bandgaps are equal to 2.68 eV and 2.24 eV. The electronic band structure was calculated via DFT simulation. The NdSF compound melts congruently at T = 1385 ± 10°С, ΔНm = 40.5 ± 10 kJ/mol, ΔS = 24.4 ± 10 J/mol. The NdSF microhardness is 455 ± 10 HV. Five phase transformations in the NdF3–Nd2S3 system were recorded by DSC; their balance equations were derived. The liquidus of the system calculated from the Redlich–Kister equation is fully consistent with the DSC data.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. M., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Optical transmission modulation and spectral properties of self-organized nematic domains
Колич.характеристики :6 с
Место публикации : Opt. Mater. - 2024. - Vol. 150. - Ст.115232. - ISSN 09253467 (ISSN), DOI 10.1016/j.optmat.2024.115232. - ISSN 18731252 (eISSN)
Примечания : Cited References: 24
Аннотация: The modulation and spectral characteristics of self-organized ensembles of nematic domains with the disclination lines non-aligned and aligned in a magnetic field have been studied using an electric field. The obtained experimental voltage dependences of the light transmission agree well with the dependences calculated using the model considerations. These dependences have been compared with the electro-optical characteristics of a homogeneous planar nematic layer. The amplitude component of the optical transmission determined by light scattering and the oscillating component caused by the phase modulation have been examined. The effect of the spectral dispersion of transmission on the electro-optical characteristics of domain ensembles has been evaluated.
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