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Published on: August 23, 2012
Horizontal versus vertical charge and energy transfer in hybrid assemblies of semiconductor nanoparticles
Gilad Gotesman1, Rahamim Guliamov, Ron Naaman
1Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.
Abstract:
We studied the photoluminescence and time-resolved photoluminescence from self-assembled bilayers of donor and acceptor nanoparticles (NPs) adsorbed on a quartz substrate through organic linkers. Charge and energy transfer processes within the assemblies were investigated as a function of the length of the dithiolated linker (DT) between the donors and acceptors. We found an unusual linker-length-dependency in the emission of the donors. This dependency may be explained by charge and energy transfer processes in the vertical direction (from the donors to the acceptors) that depend strongly on charge transfer processes occurring in the horizontal plane (within the monolayer of the acceptor), namely, parallel to the substrate.
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