Energetic disorder limits energy transfer in semiconductor nanocrystal-DNA-dye conjugates

被引：11

作者：

Becker, Klaus ^{[1
,2
]}

Rogach, Andrey L. ^{[1
,2
]}

Feldmann, Jochen ^{[1
,2
]}

Talapin, Dmitri V. ^{[3
]}

Lupton, John M. ^{[4
]}

机构：

[1] Univ Munich, Dept Phys, D-80799 Munich, Germany

[2] Univ Munich, CeNS, Photon & Optoelect Grp, D-80799 Munich, Germany

[3] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

[4] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 14期

关键词：

QUANTUM DOTS; HYBRIDIZATION; MOLECULES; DONORS; FRET;

D O I：

10.1063/1.3242015

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate the influence of spectral linewidths of individual donor-acceptor couples on energy transfer efficiency in semiconductor nanocrystal-DNA-organic dye conjugates. Temperature-dependent single molecule and ensemble spectroscopy data are analyzed using the Forster theory within the macroscopic and microscopic approaches. The results obtained evidence on the importance of the spectral overlap between emission of a single donor and absorption of a single acceptor in its close vicinity, which determines the microscopic resonance and transfer efficiency between individual neighbors. This realization poses important implications on the applicability of ensemble spectral overlap for the analysis of distance dependencies of nanoscopic objects. (C) 2009 American Institute of Physics. [doi:10.1063/1.3242015]

引用

页数：3

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