Raman spectroscopy of Cd1−xMnxS quantum dots

作者：Nebojša Ž. Romčević, Radmila Kostic, M. Romčević, Mirjana I. Čomor, Jovan M. Nedeljković · 发表于：Journal of Physics D Applied Physics · 年份：2005 · DOI：10.1088/0022-3727/38/24/009 · 被引用次数：21 · 研究领域：Quantum Dots Synthesis And Properties、Chalcogenide Semiconductor Thin Films、Advanced Semiconductor Detectors and Materials

Powders consisting of 44 Å Cd 1− x Mn x S ( x = 0; 0.05; 0.1; 0.15; 0.3) quantum dots (QDs) were synthesized using the colloidal chemistry method and characterized by Raman scattering measurements. The dominant Raman line of the 44 Å Cd 1− x Mn x S QDs was at about 300 cm −1 showing asymmetric broadening for ω < 300 cm −1 . A significant change in the intensity of the first harmonic for different x and excitation energies was noticed. Also, the second harmonic of confined Raman modes was experimentally observed. A theoretical model was used to calculate the relative contributions of the confined Raman scattering modes for the 44 Å CdS QDs and satisfactory agreement with experimental results was found.