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Общее количество найденных документов : 902
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 1-10    11-20   21-30   31-40   41-50   51-60      
1.

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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2.

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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3.

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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4.

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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5.

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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6.

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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7.

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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8.

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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9.

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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