title: Identification of different donor-acceptor structures via Förster Resonance Energy Transfer (FRET) in quantum-dot-perylene bisimide assemblies.
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.
authors.affiliation: Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany.
authors.forename: Danny
authors.initials: D
authors.lastname: Kowerko
authors.affiliation: Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Krause
authors.affiliation: Institute of Experimental Physics I, Leipzig University, D-04103 Leipzig, Germany.
authors.forename: Nicole
authors.initials: N
authors.lastname: Amecke
authors.affiliation: Sabry Corporation, Cairo, Egypt.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Abdel-Mottaleb
authors.affiliation: Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Schuster
authors.affiliation: Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Von Borczyskowski
mesh_terms: D031541:Fluorescence Resonance Energy Transfer; D007094:Imides / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry; D045663:Quantum Dots / Q000737:chemistry*
chemical_list: D007094:Imides; C510697:perylene bisimide; D010569:Perylene