Identification of different donor-acceptor structures via Förster Resonance Energy Transfer (FRET) in quantum-dot-perylene bisimide assemblies.
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.
Kowerko
Danny
D
Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany.
Krause
Stefan
S
Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany.
Amecke
Nicole
N
Institute of Experimental Physics I, Leipzig University, D-04103 Leipzig, Germany.
Abdel-Mottaleb
Mohamed
M
Sabry Corporation, Cairo, Egypt.
Schuster
Jörg
J
Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany.
Von Borczyskowski
Christian
C
Institute of Physics and nanoMA (Center for nanostructured Materials and Analytics), University of Technology, 09107 Chemnitz, Germany.
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*
D007094:Imides; C510697:perylene bisimide; D010569:Perylene