کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1642097 1517221 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Radial breathing modes in silver selenide quantum dots
ترجمه فارسی عنوان
حالت تنفسی رادیال در نقاط کوانتومی نقره سلنید
کلمات کلیدی
نقاط کوانتومی سلنید نقره، خوشه های آمورف، حالت تنفسی رادیال، حالت های رامان در نقاط کوانتومی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی


• Radial breathing modes in quantum dots.
• Porous mineral for synthesis of quantum dots.
• Parameters of structural stability in AgSe Clusters.

Silver selenide (Ag2Se) quantum dots obtained in synthetic zeolite F9 through ion exchange are reported in this work. A hydrothermal reaction was conducted between the zeolite–Ag+ system with Na2SeSO3. Quantum dots smaller than 10 nm were measured by Transmission Electron Microscopy (TEM). The particles have a cubic structure with a phase lm-m (229). A shoulder centered at 150 cm−1 was experimentally detected after the synthesis of quantum dots by Raman Spectroscopy. The Density Functional Theory (DFT) was employed to determine a possible allocation to the Raman band detected. The LSDA (Local Spin Density Approximation) approximation levels and B3LYP (Becke's three-parameter Exchange functional and the gradient corrected functional of Lee, Yang and Puar) were employed in combination with the basis set LANL2DZ (Los Alamos National Laboratory 2-double-ζ) to study the structural and vibrational properties in minimum energy clusters (AgSe)n. Radial Breathing Modes were detected between 150 and 252 cm−1 for these levels of approximation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 167, 15 March 2016, Pages 135–140
نویسندگان
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