Collective Fluorescence Blinking in Linear J-Aggregates Assisted by Long-Distance Exciton Migration
- 31 December 2009
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 10 (2), 620-626
- https://doi.org/10.1021/nl9036559
Abstract
Fluorescence blinking corresponding to collective quenching of up to 100 dye monomers is reported for individual J-aggregates of a perylene bisimide (PBI) dye. This implies an exciton diffusion length up to 70 nm in these one-dimensional assemblies. The number of quenched monomers was directly measured by comparing the fluorescence brightness of the J-aggregates with that of noncoupled PBI molecules. This brightness analysis technique is useful for unraveling photophysical parameters of any individual fluorescent nanosystem.Keywords
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