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    Guan, M.
    Atomic deciphering of cation exchange mechanism in upconversion nanoparticles / M. Guan, M. S. Molokeev, J. Zhou // J. Lumin. - 2020. - Vol. 224. - Ст. 117289, DOI 10.1016/j.jlumin.2020.117289. - Cited References: 36. - The authors acknowledge the Science and Technology Innovation Committee of Shenzhen (Grant No. KQTD20170810110913065), Australian Research Council (ARC) Discovery Early Career Researcher Award Scheme (J. Z., DE 180100669), and the China Scholarship Council (Ming Guan, No. 201506400025) . - ISSN 0022-2313
   Перевод заглавия: Атомная расшифровка катионообменного механизма в наночастицах с апконверсией
Кл.слова (ненормированные):
Mn2+ -- β-NaYF4 nanoparticles -- Cation exchange -- Rietveld refinement
Аннотация: Transition metal ion doping in upconversion nanoparticles (UCNPs) provides an effective way to enhance the luminescence for their wide array of applications. However, the doping sites of transition metal ions have not been comprehensively explored, and commonly assumed that transition metal ions replace the trivalent lanthanides within the lattice. Here we report that cation exchange of transition metal (Mn2+) in β-NaYF4:Yb3+/Er3+ UCNPs occurs through alkaline metal (Na+) replacement, via 2Na+ ↔ Mn2+ + Vacancy reaction. This process distorts the LnF9 polyhedrons and tailors the surrounding environment around the trivalent lanthanides, thereby improving the upconversion intensity from active lanthanides. Further confirmed by core-shell design and spectroscopic study, we prove that the transition–alkaline metal exchange enables both the emission enhancement and transition probability variation of activators.

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UTS-SUStech Joint Research Centre for Biomedical Materials & Devices, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodny Ave., Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhou, J.
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    Crystal structure of NaLuW2O8·2H2O and down/upconversion luminescence of the derived NaLu(WO4)2:Yb/Ln phosphors (Ln = Ho, Er, Tm) / X. Shi [et al.] // Inorg. Chem. - 2018. - Vol. 57, Is. 17. - P. 10791-10801, DOI 10.1021/acs.inorgchem.8b01427. - Cited References: 60 . - ISSN 0020-1669
   Перевод заглавия: Кристаллическая структура NaLuW2O8∙2H2O и люминесценция производных люминофоров NaLu(WO4)2:Yb/Ln (Ln=Ho, Er, Tm)
Аннотация: Hydrothermally reacting Lu(NO)3 and Na2WO4·2H2O at 200 °C and pH = 8 produced the new compound NaLuW2O8·2H2O, which was analyzed via the Rietveld technique to crystallize in the orthorhombic system (space group: Cmmm) with cell parameters a = 21.655(1), b = 5.1352(3), and c = 3.6320(2) Å and cell volume V = 403.87(4) Å3. The crystal structure presents -(NaO6)-(NaO6)- and -(LuO4(H2O)2WO5)-(LuO4(H2O)2WO5)- alternating layers linked together by the O2- ion common to NaO6 octahedron and WO5 triangle bipyramid. Tetragonal structured and phase-pure Na(Lu0.87Ln0.03Yb0.1)(WO4)2 phosphors (Ln = Ho, Er, and Tm) were directly produced by calcining their NaLuW2O8·2H2O analogous precursors at 600 °C for 2 h, followed by a detailed study of their downconversion/upconversion (DC/UC) photoluminescence. It was shown that the UC luminescence is dominated by a red band at ∼650 nm for Ho3+ (5F5 →5I8 transition), green bands at ∼500-575 nm for Er3+ (2H11/2/4S3/2 →4I15/2 transitions) and a blue band at ∼476 nm for Tm3+ (1G4 →3H6 transition), all via a three-photon process. DC luminescence of the phosphors is characterized by a ∼545 nm green emission for Ho3+ (5F4/5S2 →5I8 transition, ex = 453 nm), ∼500-575 nm green emissions for Er3+ (2H11/2/4S3/2 →4I15/2 transitions, ex = 380 nm), and a ∼455 nm blue emission for Tm3+ (1D2 →3F4 transition, ex = 360 nm), with CIE chromaticity coordinates of around (0.27, 0.71), (0.26, 0.72), and (0.15, 0.04), respectively.

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Держатели документа:
Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang Liaoning, 110819, China
Institute for Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning, 110819, China
Research Center for Functional Materials, National Institute for Materials Science, Tsukuba Ibaraki, 305-0044, Japan
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
College of New Energy, Bohai University, Jinzhou Liaoning, 121007, China

Доп.точки доступа:
Shi, X.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wang, X.; Wang, Z.; Zhu, Q.; Li, J. -G.
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Crystal structure refinement and upconversion properties of CaGd2(MoO4)4:Er3+/Yb3+ particles synthesized by the microwave-modified sol-gel method / V. V . Atuchin [и др.] // The 8th Conference on Multi-functional Materials and Applications (ICMMA 2014). - 2014 . - Ст. Poster 05-P. - P87-89

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Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Ji Myung Jang; Yong Woo Yoon; Dong Min Won; Lei Zhu; Chang Sung Lim ; Conference on Multi-functional Materials and Applications, (8 ; 2014 ; Nov. ; 27-29 ; Chungnam, Korea)
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Makarov, N. P.
Effective upconversion of CO2-laser radiation in sodium vapors / N. P. Ьakarov, A. K. Popov, V. P. Timofeev // Appl. Phys. B. - 1983. - Vol. 30, Is. 1. - P. 53-55, DOI 10.1007/BF00692659. - Cited References: 17 . - ISSN 0721-7269

РУБ Physics, Applied

Кл.слова (ненормированные):
42.65 -- 42.80 -- LASERS, CARBON DIOXIDE -- SODIUM AND ALLOYS -- LIGHT

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Держатели документа:
Siberian Branch, L. V. Kirensky Institute of Physics, USSR Academy of Sciences, Krasnoyarsk, SU-660036, Russia

Доп.точки доступа:
Popov, A. K.; Попов, Александр Кузьмич; Timofeev, V. P.
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Erratum to: fabrication of microcrystalline NaPbLa(WO4)3:Yb3+/Ho3+ phosphors and their upconversion photoluminescent characteristics (vol 29, pg 741, 2019) / C. S. Lim, V. V. Atuchin, A. S. Aleksandrovsky [et al.] // Kor. J. Mater. Res. - 2020. - Vol. 30, Is. 1. - P. 50, DOI 10.3740/MRSK.2020.30.1.50. - Cited References: 1. - This study was supported by the Research Program through the Campus Research Foundation funded by Hanseo University in 2019 (191Yunghap09). . - ISSN 1225-0562. - ISSN 2287-7258

РУБ Materials Science, Multidisciplinary

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Держатели документа:
Hanseo Univ, Dept Aerosp Adv Mat & Chem Engn, Seosan 356706, South Korea.
RAS, Inst Semicond Phys, Lab Opt Mat & Struct, SB, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Lab Semicond & Dielectr Mat, Novosibirsk 630090, Russia.
Kemerovo State Univ, Res & Dev Dept, Kemerovo 650000, Russia.
RAS, Kirensky Inst, Phys Fed Res Ctr, KSC,SB,Lab Coherent Opt, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660041, Russia.
Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia.
Ind Univ Tyumen, Dept Gen & Special Chem, Tyumen 625000, Russia.
RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB,Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB,Lab Mol Spect, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Lim, Chang Sung; Atuchin, V. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Denisenko, Yuriy G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Campus Research Foundation - Hanseo University [191Yunghap09]
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Fabrication of Microcrystalline NaPbLa(WO4)3:Yb3+/Ho3+ Phosphors and Their Upconversion Photoluminescent Characteristics / C. S. Lim, V. V. Atuchin, A. S. Aleksandrovsky [et al.] // Kor. J. Mater. Res. - 2019. - Vol. 29, Is. 12. - P. 741-746, DOI 10.3740/MRSK.2019.29.12.741. - Cited References: 28. - This study was supported by the Research Program through the Campus Research Foundation funded by Hanseo University in 2019 (191Yunghap09) and the Russian Science Foundation (19-42-02003). The authors are grateful for the support from RFBR, according to the research project 18-32-20011. . - ISSN 1225-0562. - ISSN 2287-7258
Кл.слова (ненормированные):
yellowish green phosphor -- triple tungstate -- microwave assisted sol-gel -- upconversion characteristics
Аннотация: New triple tungstate phosphors NaPbLa(WO4)3:Yb3+/Ho3+ (x = Yb3+/Ho3+ = 7, 8, 9, 10) are successfully fabricated by microwave assisted sol-gel synthesis and their structural and frequency upconversion (UC) characteristics are investigated. The compounds crystallized in the tetragonal space group I41/a and the NaPbLa(WO4)3 host have unit cell parameters a = 5.3927(1) and c = 11.7961(3) Å, V = 343.05(2) Å3, Z = 4. Under excitation at 980 nm, the phosphors have yellowish green emissions, which are derived from the intense 5S2/ 5F4 → 5I8 transitions of Ho3+ ions in the green spectral range and strong 5F5 → 5I8 transitions in the red spectral range. The optimal Yb3+:Ho3+ ratio is revealed to be x = 9, which is attributed to the quenching effect of Ho3+ ions, as indicated by the composition dependence. The UC characteristics are evaluated in detail under consideration of the pump power dependence and Commission Internationale de L'Eclairage chromaticity. The spectroscopic features of Raman spectra are discussed in terms of the superposition of Ho3+ luminescence and vibrational lines. The possibility of controlling the spectral distribution of UC luminescence by the chemical content of tungstate hosts is demonstrated.

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Держатели документа:
Department of Aerospace Advanced Materials & Chemical Engineering, Hanseo University, Seosan 356-706, Republic of Korea
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk 630090, Russia
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk 630090, Russia
Research and Development Department, Kemerovo State University, Kemerovo 650000, Russia
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Photonics and Laser Technologies, Siberian Federal University, Krasnoyarsk 660041, Russia
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen 625003, Russia
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen 625000, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Siberian Federal University, Krasnoyarsk 660041, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Lim, Chang Sung; Atuchin, V. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Denisenko, Yuriy G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич
}
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    Incommensurately modulated structure and spectroscopic properties of CaGd2(MoO4)4:Ho3+/Yb3+ phosphors for up-conversion applications / C. S. Lim [et al.] // J. Alloys Compd. - 2017. - Vol. 695. - P. 737-746, DOI 10.1016/j.jallcom.2016.06.134. - Cited References: 60. - This research was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (2015-058813) and the Russian Foundation for Basic Research (15-52-53080). VVA, ASA and ASO were partially supported by the Ministry of Education and Science of the Russian Federation. . - ISSN 0925-8388
   Перевод заглавия: Несоразмерно модулированная структура и спектроскопические свойства люминофоров CaGd2(MoO4)4:Ho3+/Yb3+ для апконверсионного применения
Кл.слова (ненормированные):
Modulation -- Molybdate -- Raman -- Sol-gel synthesis -- Upconversion -- XRD
Аннотация: CaGd2(MoO4)4:Ho3+/Yb3+ phosphors doped by Ho3+ and Yb3+ (Ho3+ = 0 and 0.05, and Yb3+ = 0, 0.35, 0.40, 0.45 and 0.50) were successfully synthesized by the microwave sol-gel method. The synthesized particles, being formed after heat-treatment at 900 °C for 16 h, showed a well crystallized morphology. All compounds are (3 + 2)D incommensurately modulated with superspace group I41/a(α,β,0)00(-β,α,0)00. It was found that parameter (α2 + β2)1/2 is proportional to cell parameter a for all studied compositions and, therefore, modulation vector k is the same for all known CaRE2(MoO4)4 compounds. The modulation vector invariance is a specific and valuable feature of this type of the structure. Under the excitation at 980 nm, the doped particles exhibited the yellow emission composed of green (545-nm) and red (655-nm) emission bands due to frequency upconversion (UC). The pump power dependence and CIE chromaticity of the UC emission were evaluated. The shape of UC bands in CaGd2(MoO4)4:Ho3+/Yb3+ is dependent on the Yb content due to the influence of the crystal field affecting a holmium ion. 13 Raman-active modes of the CaGd2(MoO4)4 lattice were identified via a comparison of experimental Raman spectra and the lattice dynamics simulation results. Four additional Raman lines were found in the region of stretching vibrations and, at least, two additional modes are present in the bending mode region. These additional modes are ascribed to incommensurate crystal lattice modulation. Luminescence bands of Ho ions are severely broadened due to a statistical disorder in the CaGd2−xYby (MoO4)4 lattice.

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Держатели документа:
Department of Advanced Materials Science & Engineering, Hanseo University, Seosan, South Korea
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, Russian Federation
Institute of Chemistry, Tyumen State University, Tyumen, Russian Federation
Laboratory for Nonlinear Optics and Spectroscopy, Siberian Federal University, Krasnoyarsk, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Photonics and Laser Technologies, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Lim, C. S.; Atuchin, V. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич
}
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Microwave sol-gel derived Ho3+/Yb3+ co-doped NaCaGd(MoO4)3 yellow phosphors and their upconversion photoluminescence properties for optoelectronic devices / Chang Sung LimWon-Chun Oh, A. S. Aleksandrovsky [et al.] // The 15th International conference on multifunctional materials and application. - 2021. - Ст. PO7. - P. 73-74. - Cited References: 4

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Доп.точки доступа:
Chang Sung Lim; Won-Chun Oh; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; International Conference on Multifunctional Materials and Application(15 ; 2021 ; Nov. 25-25 ; Nakhon Si Thammarat Rajabhat University, Thailand)
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Microwave sol-gel derived MMoO4 (M=Ba,Cs,Sr) nanoparticles doped with Er/Yb, Ho/Yb, Ho/Yb/Tm and their upconversion photoluminescence properties for biomedical applications / V. V. Atuchin [et al.] // The 10th International conference on multifunctional materials and application. - 2016. - Ст. 43-P. - P. 76

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Доп.точки доступа:
Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Park, Hee Kook; Lee, Beom Hyun; Won, Dong Min; Oh, Won-Chun; Lim, Chang Sung; International Conference on Multifunctional Materials and Application (10 ; 2016 ; Dec. 1-3 ; Khon Kaen, Tailand)
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10.

    Microwave sol-gel synthesis, microstructural and spectroscopic properties of scheelite-type ternary molybdate upconversion phosphor NaPbLa(MoO4)3:Er3+/Yb3+ / C. S. Lim [et al.] // J. Alloys Compd. - 2020. - Vol. 826. - Ст. 152095, DOI 10.1016/j.jallcom.2019.152095. - Cited References: 53. - This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2018R1D1A1A09082321). This study was supported by the Russian Science Foundation (19-42-02003, in part of conceptualization). Also, this study was supported by RFBR (18-32-20011, 18-03-00750). . - ISSN 0925-8388. - ISSN 1873-4669
   Перевод заглавия: Микроволновый золь-гель синтез, микроструктурные и спектроскопические свойства апконверсионного люминофора тройного молибдата NaPbLa(MoO4)3:Er3+/Yb3+ со структурой шеелита
Кл.слова (ненормированные):
Optical materials -- Chemical synthesis -- Molybdate -- Raman spectroscopy -- X-ray diffraction -- Phosphors
Аннотация: New ternary molybdate NaPbLa(1-x-y)(MoO4)3:xEr3+,yYb3+ (x = y = 0, x = 0.05 and y = 0.35, 0.4, 0.45 and 0.5) phosphors were successfully fabricated by the MSG (microwave sol-gel) method, and the microstructural and spectroscopic properties were characterized. The crystal structure of NaPbLa(MoO4)3 (NPLM) was defined by Rietveld analysis in space group I41/a with unit cell parameters a = 5.3735(2) and c = 11.8668(4) Å, V = 342.65(3) Å3, Z = 4 (RB = 6.64%). The unit cell volume of NaPbLa(MoO4)3 (NPLM) was intermediate between those of NaLa(MoO4)2 and PbMoO4. Under the 980 nm excitation, upconverted yellowish-green emissions at transitions from 2H11/2 and 4S3/2 were observed. No concentration quenching in the subsystem of donor ions at the content up to 50 at.% and no cross-relaxation losses in the subsystem of acceptor ions at the concentrations as high as 5 at. % were verified. The individual chromaticity points for the NaPbLa(MoO4)3:Er3+,Yb3+ phosphors, corresponding to the equal-energy point in the standard CIE diagram, revealed yellowish-green emissions.

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Держатели документа:
Department of Aerospace Advanced Materials & Chemical Engineering, Hanseo University, Seosan, 356-706, Republic of Korea
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Department of Photonics and Laser Technologies, Siberian Federal University, Krasnoyarsk, 660041, Russia
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russia
Functional Electronics Laboratory, Tomsk State University, Tomsk, 634050, Russia
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russia
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Lim, Chang Sung; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич
}
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