کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400288 | 1505911 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of the solvent environments on the spectral features of CdSe quantum dots with and without ZnS shell
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Influence of the solvent environments on the spectral features of CdSe quantum dots with and without ZnS shell Influence of the solvent environments on the spectral features of CdSe quantum dots with and without ZnS shell](/preview/png/5400288.png)
چکیده انگلیسی
The spectral properties of 5Â nm size of bare CdSe and (CdSe)ZnS core-shell quantum dots (QDs) have been recorded and investigated under different solvent environments with different polarities and different concentrations. The results showed that the spectral profile of absorption did not change for both quantum dots in different solvents under a wide range of concentrations. On the other hand, the photoluminescence (PL) spectra of (CdSe)ZnS core-shell quantum dots in non-polar solvents showed two bands; the primary around 420Â nm and the secondary around 620Â nm. In contrast, the PL spectra of bare CdSe in non-polar solvents, showed a very strong band around 590Â nm, with a total absence of the primary wavelength band at 420Â nm. Under high polar solvent environments, bare CdSe showed a new peak around 420Â nm, which was totally absent in non-polar solvent. Therefore, the solvent plays an important role in the PL spectra of bare CdSe and (CdSe)ZnS core-shell quantum dots.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 149, May 2014, Pages 369-373
Journal: Journal of Luminescence - Volume 149, May 2014, Pages 369-373
نویسندگان
K.H. Ibnaouf, Saradh Prasad, M.S. Al Salhi, A. Hamdan, M.B. Zaman, L. El Mir,