The Experts below are selected from a list of 1125 Experts worldwide ranked by ideXlab platform
Daxiang Cui - One of the best experts on this subject based on the ideXlab platform.
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Potassium Sodium Tartrate assisted hydrothermal synthesis of baluf5 yb3 er3 nanocrystals
Particuology, 2016Co-Authors: Rongjin Sun, Peiyu Qiu, Ting Yin, Guo Gao, Kan Wang, Chunlei Zhang, Daxiang CuiAbstract:Abstract Highly-dispersed BaLuF 5 :Yb 3+ /Er 3+ nanocrystals were prepared by a facile Potassium Sodium Tartrate-assisted hydrothermal method. The average particle size was approximately 20–25 nm. The formation mechanism is discussed. Potassium Sodium Tartrate led to form a complex with an approximately three-dimensional network structure, which insured largely concurrent nucleation. As a result, we acquired uniform nanoparticles. The hydrothermal temperature, holding time, and pH value were important factors affecting the formation of the BaLuF 5 :Yb 3+ /Er 3+ nanocrystals. We investigated their influence on the formation and realized the optimal reaction parameters. Remarkably, Potassium Sodium Tartrate also contributed to the biocompatibility and potential biomedical applications of BaLuF 5 :Yb 3+ /Er 3+ nanocrystals by decomposing into small organic groups attached to the nanoparticles.
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Potassium Sodium Tartrate-assisted hydrothermal synthesis of BaLuF5:Yb3+/Er3+ nanocrystals
Particuology, 2016Co-Authors: Rongjin Sun, Peiyu Qiu, Ting Yin, Guo Gao, Kan Wang, Chunlei Zhang, Daxiang CuiAbstract:Abstract Highly-dispersed BaLuF 5 :Yb 3+ /Er 3+ nanocrystals were prepared by a facile Potassium Sodium Tartrate-assisted hydrothermal method. The average particle size was approximately 20–25 nm. The formation mechanism is discussed. Potassium Sodium Tartrate led to form a complex with an approximately three-dimensional network structure, which insured largely concurrent nucleation. As a result, we acquired uniform nanoparticles. The hydrothermal temperature, holding time, and pH value were important factors affecting the formation of the BaLuF 5 :Yb 3+ /Er 3+ nanocrystals. We investigated their influence on the formation and realized the optimal reaction parameters. Remarkably, Potassium Sodium Tartrate also contributed to the biocompatibility and potential biomedical applications of BaLuF 5 :Yb 3+ /Er 3+ nanocrystals by decomposing into small organic groups attached to the nanoparticles.
Joachim Stöckigt - One of the best experts on this subject based on the ideXlab platform.
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Crystallization and preliminary X-ray analysis of strictosidine synthase and its complex with the substrate tryptamine.
Acta crystallographica. Section D Biological crystallography, 2005Co-Authors: Juergen Koepke, Günter Fritzsch, Hartmut Michel, Joachim StöckigtAbstract:Strictosidine synthase (STR1) is a central enzyme that participates in the biosynthesis of almost all plant monoterpenoid indole alkaloids. After heterologous expression in Escherichia coli, crystals of STR1 and its substrate complex with tryptamine were obtained by the hanging-drop technique at 302-304 K with Potassium Sodium Tartrate tetrahydrate as precipitant. All crystals belong to space group R3. The native STR1 crystals diffract to 2.95 A and have unit-cell parameters a = b = 150.3, c = 122.4 A. The tryptamine complex crystals diffract to 2.38 A, with unit-cell parameters a = b = 147.3, c = 122.3 A.
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Crystallization and preliminary X-ray crystallographic analysis of strictosidine synthase from Rauvolfia: the first member of a novel enzyme family.
Biochimica et biophysica acta, 2004Co-Authors: Juergen Koepke, Toni M. Kutchan, Günter Fritzsch, Ralf Diem, Hartmut Michel, Joachim StöckigtAbstract:Strictosidine synthase is a central enzyme involved in the biosynthesis of almost all plant monoterpenoid indole alkaloids. Strictosidine synthase from Rauvolfia serpentina was heterologously expressed in Escherichia coli. Crystals of the purified recombinant enzyme have been obtained by the hanging-drop technique at 303 K with Potassium Sodium Tartrate tetrahydrate as precipitant. The crystals belong to the space group R3 with cell dimensions of a=b=150.3 A and c=122.4 A. Under cryoconditions (120 K), the crystals diffract to about 2.95 A.
Rongjin Sun - One of the best experts on this subject based on the ideXlab platform.
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Potassium Sodium Tartrate assisted hydrothermal synthesis of baluf5 yb3 er3 nanocrystals
Particuology, 2016Co-Authors: Rongjin Sun, Peiyu Qiu, Ting Yin, Guo Gao, Kan Wang, Chunlei Zhang, Daxiang CuiAbstract:Abstract Highly-dispersed BaLuF 5 :Yb 3+ /Er 3+ nanocrystals were prepared by a facile Potassium Sodium Tartrate-assisted hydrothermal method. The average particle size was approximately 20–25 nm. The formation mechanism is discussed. Potassium Sodium Tartrate led to form a complex with an approximately three-dimensional network structure, which insured largely concurrent nucleation. As a result, we acquired uniform nanoparticles. The hydrothermal temperature, holding time, and pH value were important factors affecting the formation of the BaLuF 5 :Yb 3+ /Er 3+ nanocrystals. We investigated their influence on the formation and realized the optimal reaction parameters. Remarkably, Potassium Sodium Tartrate also contributed to the biocompatibility and potential biomedical applications of BaLuF 5 :Yb 3+ /Er 3+ nanocrystals by decomposing into small organic groups attached to the nanoparticles.
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Potassium Sodium Tartrate-assisted hydrothermal synthesis of BaLuF5:Yb3+/Er3+ nanocrystals
Particuology, 2016Co-Authors: Rongjin Sun, Peiyu Qiu, Ting Yin, Guo Gao, Kan Wang, Chunlei Zhang, Daxiang CuiAbstract:Abstract Highly-dispersed BaLuF 5 :Yb 3+ /Er 3+ nanocrystals were prepared by a facile Potassium Sodium Tartrate-assisted hydrothermal method. The average particle size was approximately 20–25 nm. The formation mechanism is discussed. Potassium Sodium Tartrate led to form a complex with an approximately three-dimensional network structure, which insured largely concurrent nucleation. As a result, we acquired uniform nanoparticles. The hydrothermal temperature, holding time, and pH value were important factors affecting the formation of the BaLuF 5 :Yb 3+ /Er 3+ nanocrystals. We investigated their influence on the formation and realized the optimal reaction parameters. Remarkably, Potassium Sodium Tartrate also contributed to the biocompatibility and potential biomedical applications of BaLuF 5 :Yb 3+ /Er 3+ nanocrystals by decomposing into small organic groups attached to the nanoparticles.
Jing-tai Zhao - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and luminescence properties of Y2O3:Eu with flower-like microstructure
Journal of Alloys and Compounds, 2012Co-Authors: Xue-mei Zhang, Jiao Wang, Kai Guo, Haohong Chen, Xin-xin Yang, Jing-tai ZhaoAbstract:Abstract Europium-doped yttrium hydroxide (Y(OH) 3 :Eu) with flower-like microstructure has been successfully prepared via a facile hydrothermal process, using Potassium Sodium Tartrate (C 4 H 4 O 6 KNa) as a structure-directing reagent. Europium-doped yttrium oxide (Y 2 O 3 :Eu) with similar morphology is prepared by calcining the as-prepared Y(OH) 3 :Eu at 700 °C for 4 h. Influencing factors such as the concentration of Potassium Sodium Tartrate, the amount of Sodium hydroxide, and the temperature used for hydrothermal synthesis are systematically investigated. Possible formation mechanism for the flower-like microstructure is proposed on the basis of time-dependent experiment. Y 2 O 3 :Eu samples show a strong red emission corresponding to the 5 D 0 - 7 F 2 transition of Eu 3+ ions under excitation. Emission intensity varies between samples with different morphologies. The optimum Eu 3+ doping concentration is also explored. This work sheds some light on the design and preparation of novel microstructures.
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Daisy-like Y(OH)3:Eu/Y2O3:Eu microstructure: Formation and luminescence properties
Materials Letters, 2012Co-Authors: Xue-mei Zhang, Man-lian Huang, Zhi-jun Zhang, Bi-qiu Liu, Jing-tai ZhaoAbstract:Abstract An interesting daisy-like Y(OH)3:Eu microstructure was successfully prepared via a facile hydrothermal process employing Potassium Sodium Tartrate (C4H4O6KNa) as a structure-directing agent for the first time. Y2O3:Eu with the same morphology was obtained by calcining Y(OH)3:Eu precursor at 800 °C for 5 h. Phase and morphology of the products were investigated by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) respectively. It was found that the concentrations of NaOH and C4H4O6KNa played crucial roles in controlling particle size and morphology of precursor. A possible formation mechanism of the novel microstructure was proposed. The daisy-like Y2O3:Eu microstructure had a stronger photoluminescence (PL) intensity than the microrod and reference nanoparticle.
R Gopalakrishnan - One of the best experts on this subject based on the ideXlab platform.
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comparative studies on conventional solution and sankaranarayanan ramasamy sr methods grown Potassium Sodium Tartrate tetrahydrate single crystals
CrystEngComm, 2012Co-Authors: T S Shyju, S Anandhi, R GopalakrishnanAbstract:Good transparent single crystals of Rochelle salt material of Potassium Sodium Tartrate tetrahydrate (PST) was successfully grown by a conventional solution growth technique and an unidirectional growth method of Sankaranarayanan–Ramasamy. The seed crystal obtained by conventional solution growth method was cut along the (100) orientation and subsequently used for unidirectional growth. A large size single crystal was grown by slow cooling technique, with the help of solubility data. The unit cell parameters were determined from single crystal and powder X-ray diffraction studies. FTIR and Raman studies were performed to identify the functional groups present in the title compound. TG/DTA and DSC analyses have also been carried out, and the thermal behaviour of PST crystal has been studied. The grown crystals by both conventional solution growth and SR methods were subjected to various characterization methods such as HRXRD, UV-Vis, hardness, dielectric and Laser damage threshold studies to analyze the properties. The structural perfection of the grown crystals was analysed by high-resolution X-ray diffraction (HRXRD) studies and compared. The laser damage threshold studies were carried out. It is found that SR method grown crystal possesses good optical, mechanical, structural and dielectric properties when compared to conventional solution grown crystal.
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Comparative studies on conventional solution and Sankaranarayanan–Ramasamy (SR) methods grown Potassium Sodium Tartrate tetrahydrate single crystals
CrystEngComm, 2012Co-Authors: T S Shyju, S Anandhi, R GopalakrishnanAbstract:Good transparent single crystals of Rochelle salt material of Potassium Sodium Tartrate tetrahydrate (PST) was successfully grown by a conventional solution growth technique and an unidirectional growth method of Sankaranarayanan–Ramasamy. The seed crystal obtained by conventional solution growth method was cut along the (100) orientation and subsequently used for unidirectional growth. A large size single crystal was grown by slow cooling technique, with the help of solubility data. The unit cell parameters were determined from single crystal and powder X-ray diffraction studies. FTIR and Raman studies were performed to identify the functional groups present in the title compound. TG/DTA and DSC analyses have also been carried out, and the thermal behaviour of PST crystal has been studied. The grown crystals by both conventional solution growth and SR methods were subjected to various characterization methods such as HRXRD, UV-Vis, hardness, dielectric and Laser damage threshold studies to analyze the properties. The structural perfection of the grown crystals was analysed by high-resolution X-ray diffraction (HRXRD) studies and compared. The laser damage threshold studies were carried out. It is found that SR method grown crystal possesses good optical, mechanical, structural and dielectric properties when compared to conventional solution grown crystal.