کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7834145 | 1503527 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Red-ultraviolet photoluminescence tuning by Ni nanocrystals in epitaxial SrTiO3 matrix
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, the self-organized Ni nanocrystals (NCs) were embedded in the epitaxial SrTiO3 matrix using pulsed laser deposition method. With the in-situ monitoring of reflection high-energy electron diffraction, both matrix and NCs could be precisely engineered with desired qualities by regulating the growth conditions according to the full release of stress energy at the interfaces of Ni NCs and SrTiO3. We achieved a controllable strained system according to the transformation of growth modes from three dimensional (3D) islands of Ni NCs to 2D layer-by-layer of SrTiO3, corresponding to the (1â¯1â¯1) and (0â¯0â¯l) orientation for Ni and SrTiO3, respectively. With the increase of Ni NCs concentration, the absorption intensity is increasing in the regions of 190-300â¯nm, and the band gap is gradually decreased. Besides, photoluminescence (PL) spectra reveal that the energy levels of Ni 3d bands contribute to the different PL colors, further inducing the enhancement of PL intensity and red-shift of emission peaks. Compared with the pure SrTiO3 published in the literature, much wider ranges of PL emission from red to ultraviolet can be tuned by the Ni NCs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 445, 1 July 2018, Pages 65-70
Journal: Applied Surface Science - Volume 445, 1 July 2018, Pages 65-70
نویسندگان
Z.W. Xiong, L.H. Cao,