Int. J. Mol. Sci. 2009, 10(12), 5239-5256; doi:10.3390/ijms10125239
Article

Identification of Different Donor-Acceptor Structures via Förster Resonance Energy Transfer (FRET) in Quantum-Dot-Perylene Bisimide Assemblies

1 Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany 2 Institute of Experimental Physics I, Leipzig University, D-04103 Leipzig, Germany 3 Sabry Corporation, Cairo, Egypt
* Author to whom correspondence should be addressed.
Received: 21 October 2009; in revised form: 23 November 2009 / Accepted: 27 November 2009 / Published: 1 December 2009
(This article belongs to the Special Issue Single Molecules)
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Abstract: Nanoassemblies are formed via self-assembly of ZnS capped CdSe quantum dots (QD) and perylene bisimide (PBI) dyes. Upon assembly formation the QD photoluminescence is quenched, as can be detected both via single particle detection and ensemble experiments in solution. Quenching has been assigned to FRET and NON-FRET processes. Analysis of FRET allows for a distinction between different geometries of the QD dye assemblies. Time-resolved single molecule spectroscopy reveals intrinsic fluctuations of the PBI fluorescence lifetime and spectrum, caused by rearrangement of the phenoxy side groups. The distribution of such molecular conformations and their changed dynamics upon assembly formation are discussed in the scope of FRET efficiency and surface ligand density.
Keywords: semiconductor nanocrystals; self assembly; fluorescence resonance energy transfer; perylene bisimide; single molecule

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MDPI and ACS Style

Kowerko, D.; Krause, S.; Amecke, N.; Abdel-Mottaleb, M.; Schuster, J.; Von Borczyskowski, C. Identification of Different Donor-Acceptor Structures via Förster Resonance Energy Transfer (FRET) in Quantum-Dot-Perylene Bisimide Assemblies. Int. J. Mol. Sci. 2009, 10, 5239-5256.

AMA Style

Kowerko D, Krause S, Amecke N, Abdel-Mottaleb M, Schuster J, Von Borczyskowski C. Identification of Different Donor-Acceptor Structures via Förster Resonance Energy Transfer (FRET) in Quantum-Dot-Perylene Bisimide Assemblies. International Journal of Molecular Sciences. 2009; 10(12):5239-5256.

Chicago/Turabian Style

Kowerko, Danny; Krause, Stefan; Amecke, Nicole; Abdel-Mottaleb, Mohamed; Schuster, Jörg; Von Borczyskowski, Christian. 2009. "Identification of Different Donor-Acceptor Structures via Förster Resonance Energy Transfer (FRET) in Quantum-Dot-Perylene Bisimide Assemblies." Int. J. Mol. Sci. 10, no. 12: 5239-5256.

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