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    A New Nonlinear Optical Selenide Crystal AgLiGa2Se4 with Good Comprehensive Performance in Mid-Infrared Region / A. Yelisseyev, S. Lobanov, M. Molokeev [et al.] // Adv. Opt. Mater. - 2021. - Vol. 9, Is. 5. - Ст. 2001856, DOI 10.1002/adom.202001856. - Cited References: 32. - Crystal growth and investigation of physical properties were supported by Russian Science Foundation, Russia (#19‐12‐00085). Spectroscopic data were obtained at the Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Russia; Ministry of Science and Higher Education, Russia (performed on a state assignment). The work on first‐principles calculations also supported by National Science Foundation in China (No.51872297) and Fujian Institute of Innovation (FJCXY18010201) in Chinese Academy of Sciences . - ISSN 2195-1071
   Перевод заглавия: Новый нелинейно-оптический кристалл селенида AgLiGa2Se4 с хорошими комплексными характеристиками в средней инфракрасной области
Кл.слова (ненормированные):
crystal growth -- first principles calculations -- inorganic functional materials -- laser damage threshold -- second harmonic generation
Аннотация: Mid‐infrared (mid‐IR) nonlinear optical (NLO) crystals are indispensable for the mid‐IR lasers generation with tunable wavelengths from 3 to 20 µm. AgGaSe2 is a commercial mid‐IR NLO crystal with the highest figures of merit, but suffers low laser damage threshold (LDT). To achieve the balance of optical transmission, NLO effect, and LDT, it is proposed to molecularly modify the AgGaSe2 structure by introducing the [LiSe4] tetrahedra, and successfully grow large crystals of a new selenide AgLiGa2Se4. The replacement of half of the heavy Ag+ cations with light Li+ increases the band gap to 2.2 eV (vs. 1.7 eV in AgGaSe2). The LDT value in AgLiGa2Se4 increases five times compared to that in AgGaSe2, while keeping a relatively large NLO susceptibility of 26 pm V−1. Moreover, the thermal expansion coefficients in AgLiGa2Se4 are approximately two times lower in absolute value compared with AgGaSe2, which is beneficial to the large crystal growth. All these advantages would make AgLiGa2Se4 a new promising NLO crystal for mid‐IR laser applications.

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Держатели документа:
Laboratory of Lithospheric Mantle and Diamond Deposits, Laboratory of Crystal Growth, Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, 630090, Russian Federation
Department of Physics Laboratory of Functional materials, Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Department of Engineering Physics and Radioelectronic, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Technical Institute of Physics and Chemistry CAS, Beijing, 100190, China
University of Chinese Academy of Sciences, Beijing, 100190, China
Laboratory of Condensed Matter Spectroscopy, Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russian Federation

Доп.точки доступа:
Yelisseyev, A.; Lobanov, S.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhang, S.; Pugachev, A.; Lin, Z.; Vedenyapin, V.; Kurus, A.; Khamoyam, A.; Isaenko, L.
}
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    Опалоподобные структуры на основе субмикросфер полиметилметакрилата / И. В. Немцев, О. В. Шабанова, И. А. Тамбасов [и др.] // Ученые зап. физ. фак-та МГУ. - 2020. - № 5. - Ст. 2050101. - Библиогр.: 18 . - ISSN 2307-9665
   Перевод заглавия: Opal-like structures based on polymethylmethacrylate submicrospheres
Кл.слова (ненормированные):
самосборка -- метаматериал -- фотонный кристалл -- опал -- фотонная запрещенная зона -- электронная микроскопия -- инфракрасная спектроскопия -- self-assembly -- metamaterial -- photonic crystal -- opal -- photonic band gap -- electron microscopy -- infrared spectroscopy
Аннотация: В данной работе методом самосборки из частиц полиметилметакрилата субмикронного размера с полидисперсностью менее 5% изготовлены двумерные и трехмерные метаматериалы - коллоидные кристаллы. Морфологические особенности полученных образцов исследованы на сканирующем электронном микроскопе сверхвысокого разрешения FE-SEM Hitachi S-5500. Три различные области поверхности трехмерного опала исследованы с помощью спектроскопии отраженного света с угловым разрешением. Измерения спектров проводились в диапазоне 400-1250 нм. Вышеуказанными методами обнаружена высокоупорядоченная структура. Выявлено узкое гранулометрическое распределение частиц. Определены средний диаметр частиц, плотность упаковки, добротность и отражательная способность образцов. На основе экспериментальных спектров отражения выполнена аппроксимация зависимости максимальной длины волны отражательной способности от угла, используя модифицированный закон Брэгга-Снеллиуса. На основании данной зависимости определены длина волны максимума отражения при нормальном падении, диаметр частиц и плотность упаковки. Рассчитана длина волны центра фотонной запрещенной зоны для высокоупорядоченной поверхности при нормальном падении. Экспериментально измеренная полная ширина пика на полувысоте для наилучшего образца составила 70 нм, а добротность - 12.4. Рассчитанный коэффициент заполнения для высокоупорядоченного опала составил 87 %. Средний диаметр частиц, полученный при помощи аппроксимации спектров отражения, отлично согласуется со значениями, полученными с помощью электронной микроскопии. Наиболее интересный результат заключается в том, что отражающая способность поверхности при нормальном падении света может достигать 98 %, и эта величина зависит от коэффициента заполнения - плотности упаковки.
In this paper, 2D and 3D metamaterials based on colloidal crystals are made from submicron-sized polymethylmethacrylate particles with a polydispersity of less than 5%. Morphological features of the obtained samples were studied using an ultra-highresolution FE-SEM Hitachi S-5500 scanning electron microscope. Three different surface areas of a three-dimensional opal was investigated using spectroscopy of the reflected light with the angular resolution. The spectra were measured in the range of 400- 1250 nm. The above methods revealed a highly ordered structure. A narrow particle size distribution was revealed. The average particle diameter, packing density, q-factor, and reflectivity of the samples were determined. Based on the experimental reflection spectra, the dependence of the maximum reflectivity wavelength on the angle is approximated using the modified Bragg-Snell law. Based on this dependence, the wavelength of the maximum reflection at normal incidence, the particle diameter, and the packing density are determined. The wavelength of the center of the photonic band gap is calculated for a highly ordered surface at normal incidence. The experimentally measured full width of the peak at half-height for the best sample was 70 nm, and the q factor was 12.4. The calculated filling factor for the highly ordered opal was 87%. The average particle diameter obtained by approximating the reflection spectra is in perfect agreement with the values obtained by electron microscopy. The most interesting result is that the reflectivity of the surface at normal light incidence can reach 98%, and this value depends on the filling factor the density of the package.

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РИНЦ
Держатели документа:
Федеральный исследовательский центр «Красноярский научный центр Сибирского отделения Российской академии наук»
Специальное конструкторско-технологическое бюро «Наука» Федеральный исследовательский центр «Красноярский научный центр Сибирского отделения Российской академии наук»
Институт физики им. Л.В. Киренского ФИЦ КНЦ СО РАН

Доп.точки доступа:
Немцев, И. В.; Шабанова, О. В.; Тамбасов, Игорь Анатольевич; Tambasov, I. A.; Иваненко, Александр Анатольевич; Ivanenko, A. A.; Зырянов, Виктор Яковлевич; Zyryanov, V. Ya.
}
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    Multi-Site Cation Control of Ultra-Broadband Near-Infrared Phosphors for Application in Light-Emitting Diodes / G. N.A.D. Guzman, V. Rajendran, Z. Bao [et al.] // Inorg. Chem. - 2020. - Vol. 59, Is. 20. - P. 15101-15110, DOI 10.1021/acs.inorgchem.0c02055. - Cited References: 26. - The authors would like to acknowledge the support of the Ministry of Science and Technology of Taiwan (Contract Nos. MOST 109-2112-M-003-011, MOST 109-2113-M-002-020-MY3, MOST 107-2113-M-002-008-MY3, MOST 107-2923-M-002-004-MY3, and MOST 106-2112-M-003-007-MY3), the National Science Center Poland Grant Opus (No. 2016/23/B/ST3/03911), and the National Center for Research and Development Poland Grant (No. PL-TW/V/1/2018). T. Lesniewski would like to acknowledge the support of the National Science Center Poland, Grant Preludium 13 (No. 2017/25/N/ST3/02412) . - ISSN 0020-1669
   Перевод заглавия: Управление катионами в нескольких позициях сверхширокополосных люминофоров ближнего инфракрасного диапазона для применения в светодиодах
Аннотация: Near-infrared (NIR) phosphors are fascinating materials that have numerous applications in diverse fields. In this study, a series of La3Ga5GeO14:Cr3+ phosphors, which was incorporated with Sn4+, Ba2+, and Sc3+, was successfully synthesized using solid-state reaction to explore every cationic site comprehensively. The crystal structures were well resolved by combining synchrotron X-ray diffraction and neutron powder diffraction through joint Rietveld refinements. The trapping of free electrons induced by charge unbalances and lattice vacancies changes the magnetic properties, which was well explained by a Dyson curve in electron paramagnetic resonance. Temperature and pressure-dependent photoluminescence spectra reveal various luminescent properties between strong and weak fields in different dopant centers. The phosphor-converted NIR light-emitting diode (pc-NIR LED) package demonstrates a superior broadband emission that covers the near-infrared (NIR) region of 650-1050 nm. This study can provide researchers with new insight into the control mechanism of multiple-cation-site phosphors and reveal a potential phosphor candidate for practical NIR LED application.

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Department of Physics, National Taiwan Normal University, Taipei, 116, Taiwan
Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei, 106, Taiwan
Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
Institute for Superconducting and Electronic Materials, Faculty of Engineering, University of Wollongong, Wollongong, 2522, Australia
Institute of Experimental Physics, Faculty of Mathematic, Physics and Informatics, University of Gdansk, Wita Stwosza 57, Gdansk, 80-308, Poland
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 60041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Institute of Physics, Department of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology, Szczecin, al. Piastow 48, Szczecin, 70-311, Poland
Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan
Everlight Electronics Co., Ltd., New Taipei City, 238, Taiwan

Доп.точки доступа:
Guzman, G. N.A.D.; Rajendran, V.; Bao, Z.; Fang, M. -H.; Pang, W. -K.; Mahlik, S.; Lesniewski, T.; Grinberg, M.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Leniec, G.; Kaczmarek, S. M.; Ueda, J.; Lu, K. -M.; Hu, S. -F.; Chang, H.; Liu, R. -S.
}
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Theoretical DFT interpretation of infrared spectra of biologically active arabinogalactan sulphated derivatives / A. S. Kazachenko, F. N. Tomilin, A. A. Pozdnyakova [et al.] // Chem. Pap. - 2020. - Vol. 74, Is. 11. - P. 4103-4113, DOI 10.1007/s11696-020-01220-3. - Cited References: 52. - The reported work was funded by RFBR and the government of Krasnoyarsk region according to the research project. 18-43-242003. The study was carried out using equipment of the Krasnoyarsk Regional Center of Research Equipment, Federal Research Center "Krasnoyarsk Science Center SB RAS". Publication was also partially supported by Project FSWM-2020-0033 of Russian Ministry of Science and Education.The authors are grateful to I.V. Korolkova for IR-spectra. . - ISSN 2585-7290. - ISSN 1336-9075

РУБ Chemistry, Multidisciplinary
Рубрики:
DENSITY-FUNCTIONAL THEORIES
ASTRAGALUS POLYSACCHARIDE
ANTICOAGULANT
Кл.слова (ненормированные):
Arabinogalactan -- Sulphated arabinogalactan -- FTIR-spectra -- Molecular structure -- Density functional theory
Аннотация: Arabinogalactan (AG) and sulphated arabinogalactans which are products of chemical modification of arabinogalactan polysaccharide with anticoagulant properties were studied by experimental infrared (IR) spectroscopy combined with density functional theory simulations. Mutual analysis of experimental and theoretical IR frequencies indicates that the discrepancies between experiment and theory is caused by the influence of –OH groups, which led to the energy shift and broadening of the absorption IR bands. It was found that theoretical and experimental spectra correspond well within the 3000–4000 cm−1 spectral region. Addition of sulphur group in AG structure causes hydroxyl group to become accessible for further sulphation. The difference between experimental and theoretical IR frequencies of sulphated AG derivatives is greater than that of the parent arabinogalactan due to the increase in the number of possible isomers and conformers.

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Держатели документа:
FRC Krasnoyarsk Sci Ctr SB RAS, Inst Chem & Chem Technol SB RAS, 50-24 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
FRC Krasnoyarsk Sci Ctr SB RAS, Kirensky Inst Phys SB RAS, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Natl Res Tomsk State Univ, Lenin Ave 36, Tomsk 634050, Russia.
Kyungpook Natl Univ, Dept Chem, 80 Daehak Ro, Daegu 41566, South Korea.
Kyungpook Natl Univ, Green Nano Mat Res Ctr, 80 Daehak Ro, Daegu 41566, South Korea.

Доп.точки доступа:
Kazachenko, Aleksandr S.; Tomilin, F. N.; Томилин, Феликс Николаевич; Pozdnyakova, Anastasia A.; Vasilyeva, Natalia Yu; Malyar, Yuriy N.; Kuznetsova, Svetlana A.; Avramov, P. V.; Аврамов, Павел Вениаминович; RFBRRussian Foundation for Basic Research (RFBR); government of Krasnoyarsk region [18-43-242003]; Russian Ministry of Science and EducationMinistry of Education and Science, Russian Federation [FSWM-2020-0033]
}
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    Two-site Cr3+ occupation in the MgTa2O6:Cr3+ phosphor toward broad-band near-infrared emission for vessel visualization / G. C. Liu, M. S. Molokeev, B. F. Lei, Z. G. Xia // J. Mater. Chem. C. - 2020. - Vol. 8, Is. 27. - P. 9322-9328, DOI 10.1039/d0tc01951h. - Cited References: 52. - The present work was supported by the National Natural Science Foundations of China (Grant No. 51972118, 51961145101 and 51722202), Fundamental Research Funds for the Central Universities (D2190980), the Guangzhou Science & Technology Project (202007020005), the Guangdong Provincial Science & Technology Project (No. 2018A050506004), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). This work is also funded by RFBR according to the research project No. 19-52-80003. . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Заселение Cr3+ двух кристаллографических позиций в люминофоре MgTa2O6:Cr3+ для широкополосного ближнего инфракрасного излучения используемого для визуализации сосудов

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
LIGHT-SOURCES
   PHOSPHOR
   LUMINESCENCE
   PHOTOLUMINESCENCE
Аннотация: Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) have great potential in photonic, optoelectronic and biological applications, while the discovery of a broad-band NIR phosphor still remains a challenge. Here, we report a novel Cr3+-activated MgTa2O6 phosphor with an asymmetrical emission band ranging from 700 to 1150 nm and a large full width at half maximum (FWHM) of 140 nm upon 460 nm blue light excitation. The broad spectrum is assigned to the overlap of two bands centered at 910 and 834 nm, which originate from the spin-allowed transition of 4T2 → 4A2 for different Cr3+ ions located in the two six-coordinated crystallographic sites of Mg2+ and Ta5+, respectively. The distribution of blood vessels and bones in human palm and wrist is observed with the assistance of a commercial NIR camera and a fabricated pc-LED, which demonstrates that the MgTa2O6:Cr3+ phosphor is promising in biological applications.

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Держатели документа:
South China Univ Technol, Sch Mat Sci & Technol, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510640, Peoples R China.
Fed Res Ctr KSC SB RAS, Lab Crystal Phys, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Peoples R China.

Доп.точки доступа:
Liu, Gaochao; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lei, Bingfu; Xia, Zhiguo
}
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Metastable growth and infrared spectra of CuB2O4:Ni single crystals / E. Moshkina, M. Molokeev, N. Belskaya [et al.] // CrystEngComm. - 2021. - Vol. 23, Is. 38. - P. 6761-6768, DOI 10.1039/d1ce00729g. - Cited References: 23. - The authors acknowledge Dr. Irina Gudim regarding the valuable discussion of the obtained results on the experimental stage and the stage of manuscript preparation. This research was supported by the Russian Science Foundation grant no.19-12-00413. X-ray and EDX data was obtained with use the analytical equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS" . - ISSN 1466-8033

РУБ Chemistry, Multidisciplinary + Crystallography

Аннотация: In this work, the formation of CuB2O4:Ni crystals in fluxes based on Li2WO4-Bi2O3-WO3 solvents was studied. The crystallized phases were studied with respect to the WO3 content and the mode of crystal holder insertion. A distinctive feature of the used flux growing mode is the metastable nature of nucleation: the desirable phase was obtained by using a super-cooled crystal holder - under insertion of a crystal holder cooled down to temperatures of the metastable zone. By powder X-ray diffraction, the composition of the obtained samples was analyzed. IR reflection and transmission spectra of the as-synthesized single crystals were recorded and analyzed in comparison with that of "pure" CuB2O4.

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Держатели документа:
RAS, Kirensky Inst Phys SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Fed Res Ctr, Krasnoyarsk 660036, Russia.
RAS, Inst Spect, Moscow 108840, Russia.

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Belskaya, N. A.; Бельская, Надежда Алексеевна; Nemtsev, I. V.; Немцев, Иван Васильевич; Molchanova, Anastasiia; Boldyrev, Kirill; Russian Science FoundationRussian Science Foundation (RSF) [19-12-00413]
}
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    A highly efficient and suitable spectral profile Cr3+-doped garnet near-infrared emitting phosphor for regulating photomorphogenesis of plants / X. Zou, X. Wang, H. Zhang [et al.] // Chem. Eng. J. - 2022. - Vol. 428. - Ст. 132003, DOI 10.1016/j.cej.2021.132003. - Cited References: 46. - The work was supported from the National Natural Science Foundations of China (Nos. 21671070, 51802101), the Guangdong Basic and Applied Basic Research Foundation (No. 2021A1515012613), the Guangdong Provincial Science & Technology Project (Nos. 2020A1414010046, 2021A0505050006), the Guangzhou Science & Technology Project (No. 202007020005), the Natural Science Foundation of Guangdong Province (No. 2018A030310217), the Project of GDUPS (2018) for Prof. Bingfu LEI, and the Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (Nos. 2021KJ131 , 2021KJ122) . - ISSN 1385-8947
   Перевод заглавия: Высокоэффективный и подходящий спектральный профиль гранатового люминофора ближнего инфракрасного диапазона, легированного Cr3+, для регулирования фотоморфогенеза растений
Кл.слова (ненормированные):
Cr3+-doped phosphor -- NIR pc-LED -- Photomorphogenesis -- Plant growth
Аннотация: Far-red/phytochrome (PFR) plays a key role in photomorphogenesis of plants. However, how to obtain a near-infrared (NIR) emitting phosphor with high external quantum efficiency (EQE), suitable spectral profile, and low thermal quenching remains a huge challenge. Herein, a NIR phosphor, Gd2.4Lu0.6Ga4AlO12:Cr3+,H3BO3 (GLGA:Cr3+) was developed via regulating the crystal field environment and adding fluxes, which exhibits a peak maximum at 728 nm with a relatively narrow full-width at half maximum (FWHM) of 107 nm, matching well with the absorption band of PFR. Upon 450 nm excitation, the internal quantum efficiency (IQE) and EQE of the optimal phosphor are 90.3% and 32.0%, respectively. At 423 K, the integrated emission intensity of the investigated phosphor is about 75% of that at room temperature. Benefiting from the excellent optical performance, a NIR phosphor-converted light-emitting diode (pc-LED) was fabricated, which shows a NIR output power of 505.99 mW and photoelectric conversion efficiency of 11.24% at 300 mA. Moreover, plant growth experiments demonstrate that the biomass of pea seedlings is increased by 67.72% under supplementary NIR light irradiation. The findings of this research will motivate further research on new Cr3+-doped NIR phosphors for regulating photomorphogenesis of plants.

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Держатели документа:
Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangdong, Guangzhou, 510642, China
Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong, Maoming 525100, China
Department of Physics, Georgia Southern University, Statesboro, GA 30460, United States
College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Zou, X.; Wang, X.; Zhang, H.; Kang, Y.; Yang, X.; Zhang, X.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lei, B.
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Dynamics of resonant x-ray and Auger scattering / F. Gel'mukhanov, M. Odelius, S. P. Polyutov [et al.] // Rev. Mod. Phys. - 2021. - Vol. 93, Is. 3. - Ст. 035001, DOI 10.1103/RevModPhys.93.035001. - Cited References: 467. - The reported study was funded by the Russian Foundation for Basic Research (RFBR) (Project No. 19-29-12015) and partly supported by the Ministry of Science and Higher Education of the Russian Federation (Project No. FSRZ-2020-0008). M. O. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under Marie Skłodowska-Curie Grant Agreement No. 860553, the Carl Tryggers Foundation (Contract No. CTS18:285), and the Swedish Energy Agency (Contract No. 2017-006797). Funding is acknowledged from the European Research Council through ERC-ADG-2014 (Advanced Investigator Grant No. 669531 EDAX) at the University of Potsdam within the Horizon 2020 EU Framework Programme for Research and Innovation. Support from the Helmholtz Association, in particular, the Helmholtz Virtual Institute 419 “Dynamic Pathways in Multidimensional Landscapes” and the Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, is acknowledged. Support from the Swedish Research Council (Grants No. 2019-03470 and No. 2015-03781) is also acknowledged . - ISSN 0034-6861
Кл.слова (ненормированные):
Augers -- Electrons -- Free electron lasers -- Light absorption -- Neutron scattering -- X ray scattering -- X rays -- Electron-nuclear dynamics -- Experimental techniques -- Resonant inelastic x-ray scattering -- Resonant scattering -- Structural aspects -- Time resolved studies -- Vibrational infrared -- X-ray free electron lasers
Аннотация: An overview of both experimental and theoretical results in the field of resonant scattering of tunable soft and hard x-ray radiation is presented, with a main focus on the closely related processes of resonant inelastic x-ray scattering (RIXS) and resonant Auger scattering (RAS). The review starts with an overview of fundamental dynamical aspects of RIXS illustrated for different systems. A detailed analysis of case studies with increasing complexity, considering both gas-phase and condensed matter (liquids and solids) applications, is given. In the review, the most important achievements in investigations of coupled electron-nuclear dynamics and structural aspects in studies of liquids and solids over the last two decades are outlined. To give a perspective on the insights from RIXS and RAS, the x-ray results are discussed against the background of complementary experimental techniques like vibrational infrared absorption and Raman spectroscopy, as well as small-angle x-ray and neutron scattering. Finally, recent achievements in time-resolved studies based on x-ray free-electron lasers are described.

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Держатели документа:
Department of Theoretical Chemistry and Biology, KTH Royal Institute of Technology, Stockholm, 10691, Sweden
Institute for Methods and Instrumentation in Synchrotron Radiation Research, Helmholtz-Zentrum Berlin fur Materialien und Energie, Albert-Einstein-Strasse 15, Berlin, 12489, Germany
International Research Center of Spectroscopy and Quantum Chemistry-IRC SQC, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Physics, AlbaNova University Center, Stockholm University, Stockholm, SE-106 91, Sweden
Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Strasse 24-25, Potsdam, 14476, Germany

Доп.точки доступа:
Gel'mukhanov, F.; Гельмуханов, Фарис Хафизович; Odelius, M.; Polyutov, S. P.; Полютов, Сергей Петрович; Fohlisch, A.; Kimberg, V.; Кимберг, Виктор Валерьевич
}
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    Li/Na substitution and Yb3+ co-doping enabling tunable near-infrared emission in LiIn2SbO6:Cr3+ phosphors for light-emitting diodes / G. Liu, T. Hu, M. S. Molokeev, Z. Xia // iScience. - 2021. - Vol. 24, Is. 4. - Ст. 102250, DOI 10.1016/j.isci.2021.102250. - Cited References: 45. - The present work was supported by the National Natural Science Foundation of China of China (Grant Nos. 51972118 and 51961145101), the Fundamental Research Funds for the Central Universities (D2190980), the Guangzhou Science & Technology Project (202007020005), the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Pro-gram (2017BT01X137), and RFBR according to the research project No. 19-52-80003 . - ISSN 2589-0042
   Перевод заглавия: Замещение Li/Na и содопирование Yb3+, позволяющее настраивать излучение в ближней инфракрасной области в люминофорах LiIn2SbO6: Cr3+ для светоизлучающих диодов
Кл.слова (ненормированные):
Inorganic Chemistry -- Optical Materials -- Photonics
Аннотация: Near-infrared (NIR) phosphor-converted light-emitting diode (pc-LED) has great potential in non-invasive detection, while the discovery of tunable broadband NIR phosphor still remains a challenge. Here, we report that Cr3+-activated LiIn2SbO6 exhibits a broad emission band ranging from 780 to 1400 nm with a full width at half maximum (FWHM) of 225 nm upon 492 nm excitation. The emission peaks are tuned from 970 to 1020 nm together with considerable broadening of FWHM (∼285 nm) via Li/Na substitution. Depending on Yb3+ co-doping, a stronger NIR fluorescence peak of Yb3+ appears with improved thermal resistance, which is ascribed to efficient energy transfer from Cr3+ to Yb3+. An NIR pc-LED package has been finally designed and demonstrated a remarkable ability to penetrate pork tissues (∼2 cm) so that the insertion depth of a needle can be observed, indicating that the phosphor can be applied in non-destructive monitoring.

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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 Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation

Доп.точки доступа:
Liu, G.; Hu, T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Z.
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10.

Oreshonkov, A. S.
Structural features of Y2O2SO4 via DFT calculations of electronic and vibrational properties / A. S. Oreshonkov, Y. G. Denisenko // Materials. - 2021. - Vol. 14, Is. 12. - Ст. 3246, DOI 10.3390/ma14123246. - Cited References: 44 . - ISSN 1996-1944
Кл.слова (ненормированные):
Yttrium oxysulfate -- DFT -- Lattice dynamics -- Infrared -- Raman -- Vibrations -- Y2O2SO4
Аннотация: The traditional way for determination of molecular groups structure in crystals is the X-Ray diffraction analysis and it is based on an estimation of the interatomic distances. Here, we report the analysis of structural units in Y2O2SO4 using density functional theory calculations of electronic properties, lattice dynamics and experimental vibrational spectroscopy. The Y2O2SO4 powder was successfully synthesized by decomposition of Y2(SO4)3 at high temperature. According to the electronic band structure calculations, yttrium oxysulfate is a dielectric material. The difference between the oxygen–sulfur and oxygen–yttrium bond nature in Y2O2OS4 was shown based on partial density of states calculations. Vibrational modes of sulfur ions and [Y2O22+] chains were obtained theoretically and corresponding spectral lines observed in experimental Infrared and Raman spectra.

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Держатели документа:
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
School of Engineering and Construction, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation

Доп.точки доступа:
Denisenko, Y. G.; Орешонков, Александр Сергеевич
}
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