Resonant Raman scattering in ultrafine CdSxSe1-x colloidal particles

被引：4

作者：

Melnik, N. N. ^{[1
]}

Zavaritskaya, T. N. ^{[1
]}

Kucherenko, I. V. ^{[1
]}

Plyashechnik, O. S. ^{[1
]}

Valakh, M. Ya. ^{[2
]}

Dzhagan, V. N. ^{[2
]}

Raevskaya, A. E. ^{[3
]}

机构：

[1] Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia

[2] Natl Acad Sci Ukraine, VE Lashkaryov Inst Semicond Phys, UA-03028 Kiev, Ukraine

[3] Natl Acad Sci Ukraine, LV Pisarzhevsky Inst Phys Chem, UA-03028 Kiev, Ukraine

来源：

BULLETIN OF THE LEBEDEV PHYSICS INSTITUTE | 2011年 / 38卷 / 02期

关键词：

colloidal nanoparticles; CdSSe; absorption; RRS; photoluminescence; anharmonicity; CDS QUANTUM DOTS; SEMICONDUCTOR-NANOCRYSTALS; SIZE-DEPENDENCE; SURFACE PHONONS; OPTICAL PHONONS; SPECTROSCOPY; POLYETHYLENIMINE;

D O I：

10.3103/S1068335611020047

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Vibrational spectra of ultrafine (similar to 1.8 nm) CdS (x) Se1-x colloidal nanoparticles (NPs) are studied by resonant Raman scattering (RRS). The detected difference of the shape and spectral position of the longitudinal optical vibration band in comparison with the spectrum of slightly larger NPs (a parts per thousand yen 2 nm) is explained by the dominance of surface atoms as their fraction increases above 50%. The correlation of experimental results with ab initio calculated vibrational spectra and with vibration anharmonicity enhancement as the NP size decreases is discussed.

引用

页码：48 / 51

页数：4

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