Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Concentration dependence of fluorescence resonance energy transfer in CdSe/ZnS quantum dots colloidal systems

Not Accessible

Your library or personal account may give you access

Abstract

The study of the spatial photon migration as a function of the concentration brings into attention the problem of the energy transfer in quantum dot (QD) embedded systems. By measuring the photon propagation and its spatial dependence it is possible to understand the whole dynamics in a QD system, and also improve their concentration dependence to maximize energy propagation due to radiative and non-radiative processes. Core-shell quantum dots CdSe-ZnS in decane colloidal solutions were used to explore energy transfer phenomena. A confocal microscope was adapted to scan the spatial distribution of emitted luminescence from the samples. The energy migration provided by the luminescence spatial distribution was measured as photon propagation according to the diffusion theory. We observed that the photon migration length (PML) decreases by increasing the QD concentration. At high concentrations, this process is regarded as a signature of Förster resonance energy transfer (FRET) from the donor QDs to the acceptor QDs.

© 2013 Optical Society of America

PDF Article
More Like This
Photon migration and energy transfer in CdSe/ZnS quantum dots

G. A. Alves, A. F. G. Monte, E. J. dos Santos, and T. P. Quaresma
WE22 Latin America Optics and Photonics Conference (LAOP) 2010

Energy transfer between CdSe/ZnS quantum dots in colloidal solution studied by thermal lens technique

Vanessa M. Martins, Adamo F. G. do Monte, Acácio A. Andrade, and Djalmir N. Messias
LM2A.31 Latin America Optics and Photonics Conference (LAOP) 2012

Laser Induced Energy Transfer in Colloidal System of Quantum Dots Coupled by FRET

Guilherme A. Alves, José M. Villas-Bôas, and Adamo F. G. do Monte
JW3A.1 Frontiers in Optics (FiO) 2013

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved