کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1332103 979030 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Selected-control solution-phase route to multiple-dendritic and cuboidal structures of PbSe
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Selected-control solution-phase route to multiple-dendritic and cuboidal structures of PbSe
چکیده انگلیسی

Well-crystalline PbSe multiple-dendritic hierarchical structures have been prepared through a facile hydrothermal process in an alkaline glycerol/water solution system using SeO2 as selenium source and hydrous hydrazine as reducing agent at 160 °C for 12 h. The obtained products were characterized by X-ray powder diffraction, field emission scanning electron microscopy and transmission electron microscopy, which showed that the obtained products were face-centered cubic PbSe multiple-dendritic superstructures with length of each dendrite ranging from 1.0 to 1.5 μm. Additionally, cuboidal PbSe microcrystals with different concave faces can be obtained through a similar process except for using Se powders instead of SeO2 as selenium source and without hydrous hydrazine. The edge lengths of these cuboidal microcrystals range from 1.0 to 2.5 μm observed by field emission scanning electron microscopy. The influencing factors for the formation of the two kinds of PbSe microstructures were discussed and the possible growth mechanisms were proposed from the point of crystallographic and kinetic views. The studies on the corresponding photoluminescence (PL) properties of the two kinds of PbSe structures are also carried out.

PbSe multiple-dendritic hierarchical structure with 4-fold structural symmetry and cuboidal microcrystals with concave faces were selectively obtained by using different selenium sources in a glycerol/water solution system.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 179, Issue 1, January 2006, Pages 56–61
نویسندگان
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