Fast energy transfer in layer-by-layer assembled CdTe nanocrystal bilayers

被引：123

作者：

Franzl, T

Koktysh, DS

Klar, TA

Rogach, AL

Feldmann, J

Gaponik, N

机构：

[1] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany

[2] Univ Munich, CeNS, D-80799 Munich, Germany

[3] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 15期

关键词：

D O I：

10.1063/1.1702136

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on efficient resonant energy transfer in bilayers of water-soluble CdTe quantum dots. The bilayers of CdTe nanocrystals of two different sizes capped by short-chain thiols were formed by layer-by-layer assembly. Temporally and spectrally resolved fluorescence spectroscopy reveals spectral diffusion of the fluorescence signal for quantum dots within one layer as well as rapid (254 ps) energy transfer from layers of small dots to layers of larger dots, which is fast for nanocrystal pairs. Subspecies within the inhomogeneous distribution of donor nanocrystals even show energy transfer rates of (134 ps)(-1) due to a large spectral overlap with acceptor nanocrystals. (C) 2004 American Institute of Physics.

引用

页码：2904 / 2906

页数：3

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