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Preparation and characterization of nanostructured Bi_2Se_3 and Sn_(0.5)-Bi_2Se_3

Rare Metals 2009年第2期28卷 112-116页

作者： Liu, Kegao Wang, Jiyang Liu, Hong Xiang, Dong State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China School of Materials Science and Engineering Shandong Jianzhu University Jinan 250101 China

Nanostructured Bi2Se3 and Sn0.5-Bi2Se3 were successfully synthesized by hydrothermal coreduction from SnCl2?H2O and the oxides of Bi and Se. The products were characterized by X-ray diffraction (XRD),transmission electron microscopy (TEM),and field emission scanning electron microscope (FESEM). Bi2Se3 powders obtained at 180°C and 150°C consist of hexagonal flakes of 50-150 nm in side length and nanorods of 30-100 nm in diameter and more than 1 μm in length. The product obtained at 120°C is composed of thin...

关键词： growth from solution nanomaterials hydrothermal method Bi2Se3

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Facile and green route to highly luminescent ZnS-shelled CdSe nanocrystals

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Rare Metals 2009年第2期28卷 107-111页

作者： Ye Xinyua Zhuang Weidong Hu Yunsheng Luo Xinyu Zhao Chunlei Huang Xiaowei Gen Res Inst NonFerrous Met Natl Engn Res Ctr Rare Earth Mat Beijing 100088 Peoples R China Grirem Adv Mat Co Ltd Beijing 100088 Peoples R China Jiangxi Univ Sci & Technol Sch Mat & Chem Engn Ganzhou 341000 Peoples R China

Highly luminescent CdSe/ZnS nanocrystals were obtained by adapting non-TOP-based synthesis and a subsequent two-phase ZnS shelling procedure:the core CdSe nanocrystals were synthesized in sole solvent paraffin liquid with cadmium oxide,elemental sele-nium,and oleic acid; the deposition of the ZnS shell was conducted by using zinc stearate in toluene and sodium sulfide in deionized water. The green and low-cost route was proved to be more efficient to constrain the size of core nanocrystals while tuning the ...

关键词： crystal structure characterization solvent growth from solution nanomaterials CdSe/ZnS

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Synthesis, growth and Characterization of Benzophenone Added Sodium Acid Phthalate Crystal—A Potential Material for Nonlinear Optical Applications

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Journal of Minerals and Materials Characterization and Engineering 2022年第1期10卷 15-27页

作者： Anandaraj Louis Jothi Lakshmanan PG & Research Department of Physics Sacred Heart College (Autonomous) Tirupattur Tamil Nadu India Periyar University Palkalai Nagar Salem Tamil Nadu India PG & Research Department of Physics Namakkal Kavignar Ramalingam Government Arts College for Women Namakkal Tamil Nadu India

Sodium acid phthalate C8H5NaO4 is one of the suitable semiorganic single crystals hired in second harmonic generation conversion applications. In the present work, optically transparent Benzophenone doped with sodium acid phthalate (SAPB) single crystals were grown successfully by slow evaporation solution technique. Single crystal XRD analyses exposed that the crystal lattice of SAPB crystal is a monoclinic crystal system with unit cell parameters a = 6.77 Å, b = 9.31 Å, c = 13.58 Å, and space group B2cb. The crystalline nature of SAPB material was confirmed by powder XRD pattern. The functional groups present in the grown crystals were identified by the FTIR analysis ranging between 4000 and 500 cm−

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Effects of interface kinetics and anisotropyon the stability of the growing crystal faceand dissolution face during crystallization from solution under microgravity

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Chinese Physics B 2004年第12期13卷 1982-1991页

作者：朱振和洪勇葛培文俞育德 InstituteofPhysics ChineseAcademyofSciencesBeijing100080China//DepartmentofChemistryUniversityofScienceandTechnologyofBeijingBeijing100083China InstituteofPhysics ChineseAcademyofSciencesBeijing100080China//DepartmentofPhysicsCentralUniversityforNationalitiesBeijing100081China InstituteofPhysics ChineseAcademyofSciencesBeijing100080China

The stability of the shapes of the growing crystal face and dissolution face in a two-dimensional mathematical model of crystal growth from solution under microgravity is studied. Effects of the interface kinetics and anisotropy of crystallization and dissolution on the stability are also studied. It is proved that the stable shapes of crystal growth face and dissolution face do exist, which are of suitably shaped curves with their upper parts inclined backward properly no matter whether the interface kinetics and the anisotropy are taken into account or not. The stable shapes of the growing crystal faces and dissolution faces are calculated for various cases. The interface kinetics will make the inclination degree of stable crystal growth face reduce and that of stable dissolution face reduce slightly. The anisotropy of crystallization and dissolution may make the inclination degree of stable-growing crystal face smaller or larger, and that of the stable dissolution face varies very slightly.

关键词： microgravity conditions growth from solution interface interface kinetics crystallizationanisotropy

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