کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5403891 | 1505931 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Au-catalyst growth and photoluminescence of zinc-blende and wurtzite ZnS nanobelts via chemical vapor deposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Zinc-blende (ZB) and wurtzite (W) ZnS nanobelts have been achieved by rapid chemical vapor deposition at 1050 °C, with Au as catalyst and graphite as reductant. The size and crystal structure of ZnS nanobelts were influenced by the deposition temperature. In general, the ZnS nanobelts deposited at 600 °C were smoother and smaller than those at 800 °C. X-ray diffraction spectrum shows the ZnS nanobelts deposited at 600 °C were mainly ZB-ZnS, but those at 800°C were only W-ZnS. Transmission electron microscopy image and selected-area electron diffraction pattern show three crystal structures of ZnS nanobelts which were deposited at 600 °C: ZB-ZnS growing along [0 0 1], W-ZnS along [0-1 1 0] and the co-existence of ZB-twins and W-ZnS. The PL spectrum of the nanobelts under a He-Cd laser excitation shows a blue peak at 420 nm originating from ZnS self-activated center of ZnS and a green emission at 520 nm from Au impurity center.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volumes 122â123, JanuaryâApril 2007, Pages 172-175
Journal: Journal of Luminescence - Volumes 122â123, JanuaryâApril 2007, Pages 172-175
نویسندگان
Juntao Hu, Guanzhong Wang, Changxin Guo, Dapeng Li, Linli Zhang, Junjing Zhao,