Energy transfer in colloidal CdTe quantum dot nanoclusters
Citation:Clare Higgins, Manuela Lunz, A. Louise Bradley, Valerie A. Gerard, Stephen Byrne, Yurii K. Gun'ko, Vladimir Lesnyak, and Nikolai Gaponik, Energy transfer in colloidal CdTe quantum dot nanoclusters, Optics Express, 18, 24, 2010, 24486-24494
Energy transfer in colloidal CdTe quantum dot nanoclusters.pdf (Published (publisher's copy) - Peer Reviewed) 1.001Mb
Quantum dot (QD) nanoclusters were formed using oppositely charged colloidal CdTe QDs, of two different sizes, mixed in aqueous solutions. The photoluminescence (PL) spectra and time-resolved PL decays show signatures of Forster resonant energy transfer (FRET) from the donor QDs to the acceptor QD in the nanoclusters. A concentration dependence of the donor QD lifetime is observed in mixed solutions with a donor: acceptor ratio greater than 1:1. The concentration dependent time-resolved PL data indicate different regimes of cluster formation, with evidence for donor-to-donor FRET in the larger donor-acceptor nanoclusters and evidence for the formation of all-donor clusters in mixed solutions with high donor concentrations.
Science Foundation Ireland (SFI)
Type of material:Journal Article
Series/Report no:Optics Express
Availability:Full text available