کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1430772 | 1509192 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectroscopic investigations on hybrid nanocomposites: CdSÂ :Â Mn nanocrystals in a conjugated polymer
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Spectroscopic investigations on hybrid nanocomposites: CdSÂ :Â Mn nanocrystals in a conjugated polymer Spectroscopic investigations on hybrid nanocomposites: CdSÂ :Â Mn nanocrystals in a conjugated polymer](/preview/png/1430772.png)
چکیده انگلیسی
We have used electron paramagnetic resonance (EPR) spectroscopy for investigating the properties of spins, such as those carried by polarons which carry both spin and charge in poly (meta/para phenylene) PMPP: CdS doped Mn based nanocomposites. To identify the nature of paramagnetic species in PMPP matrix, we have studied the effect of different physical parameters. It was found that we are in presence of trapped polarons and localized spins which concentration has been estimated. Moreover, spin-spin and spin-lattice relaxation rates have been calculated. Then, we discussed the results of optical and EPR study on the hybrid nanocomposite (CdS nanostructures, doped with manganese (II) ions, incorporated in PMPP conjugated polymer matrix). The optical spectra of these nanocomposites were compared to the existing models of energy levels in quantum dots. Moreover, by the use of electronic paramagnetic resonance, conclusions about the location and the symmetry of Mn2+ ions have been drawn. The nanocomposite energy gap is in the 3.2-3.3 eV range. The size of the nanoparticle is about 3.3 nm and Mn2+ ions are located at or near the nanoparticle surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 26, Issues 2â3, March 2006, Pages 415-420
Journal: Materials Science and Engineering: C - Volume 26, Issues 2â3, March 2006, Pages 415-420
نویسندگان
C. Dridi, M. Haouari, H. Ben Ouada, A.-P. Legrand, J. Davenas, M. Bernard, J.-J. André, A. Haj Saïd, F. Mattoussi,