Surface effects in the fluorescence ultra-fast dynamics from CdSe nano-crystals

被引：17

作者：

Ispasoiu, RG

Lee, J

Papadimitrakopoulos, F

Goodson, T ^{[1
]}

机构：

[1] Wayne State Univ, Dept Chem, Detroit, MI 48202 USA

[2] Univ Connecticut, Inst Mat Sci, Nanomat Optoelect Lab, Storrs, CT 06269 USA

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 340卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(01)00360-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigated the ultra-fast photoluminescence (PL) and photoluminescence anisotropy (PLA) dynamics from colloidal CdSe nano-crystals (NC's). Both TOPO-capped and ZnS-capped NC's were excited high in the energy band for these investigations. The comparison between the PL dynamics from these two types of NC's shows that only the slow component of the PLA decay is influenced by surface treatment. We found that the decay of PA close to zero occurs on a time-scale of tens of femtoseconds, This rules out the contribution of intra-band energy relaxation to the polarization decay. (C) 2001 Elsevier Science B.V. All rights reserved.

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页码：7 / 12

页数：6

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