کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1521480 1511809 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase- and morphology-controlled synthesis of CdSe microstructures through an effective mixed-solvothermal route
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Phase- and morphology-controlled synthesis of CdSe microstructures through an effective mixed-solvothermal route
چکیده انگلیسی


• Cubic-phase CdSe hollow microspheres and hexagonal-phase CdSe urchin-like microstructures were controllably prepared.
• The influence of solvent ratio on the phase and morphology of CdSe was investigated.
• The optical properties of the obtained CdSe crystals were investigated.
• An “in situ phase transformation and crystal growth” mechanism was proposed.

Cubic-phase CdSe (C–CdSe) hollow microspheres and hexagonal-phase CdSe (H–CdSe) urchin-like microstructures have been controllably synthesized through an effective mixed solvothermal method in the absence of any surfactants. The products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), UV–Vis absorption spectroscopy and photoluminescence spectroscopy. The volume ratio of ethylenediamine and ethanol of two solvents is a key factor that determines the phase and shape of CdSe crystals. When the volume ratio of ethylenediamine and ethanol is changed from 1:3, through 1:1 to 4:1, CdSe crystals can be changed from hollow spheres (cubic phase), through acanthosphere (mixed phase) to urchin-like architectures (hexagonal phase). Based on the investigation of the influence of solvent ratio on the phase and morphology of CdSe, an “in situ phase transformation and crystal growth” mechanism is proposed. Optical properties indicate that the as-obtained H–CdSe urchin-like microstructures have much stronger optical absorption and emission than C–CdSe hollow microspheres.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 154, 15 March 2015, Pages 10–15
نویسندگان
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