Single Levy States-Disorder Induced Energy Funnels in Molecular Aggregates

Summary, in English

Using fluorescence super-resolution microscopy we studied simultaneous spectral, spatial localization, and blinking behavior of individual 1D J-aggregates. Excitons migrating 100 nm are funneled to a trap appearing as an additional red-shifted blinking fluorescence band. We propose that the trap is a Frenkel exciton state formed much below the main exciton band edge due to an environmentally induced heavy-tailed Levy disorder. This points to disorder engineering as a new avenue in controlling light-harvesting in molecular ensembles.

• Author: Aboma Merdasa; Angel J. Jimenez; Rafael Camacho Dejay; Matthias Meyer; Frank Wuerthner; Ivan Scheblykin
• Department/s: Chemical Physics
• Publishing year: 2014
• Language: English
• Pages: 6774-6781
• Publication/Series: Nano Letters
• Volume: 14
• Issue: 12
• Links: http://dx.doi.org/10.1021/nl5021188
• Document type: Journal article
• Publisher: The American Chemical Society (ACS)
• Topic: Atom and Molecular Physics and Optics
• Keywords: J-aggregates; Levy distribution; super-resolution microscopy; single; molecule spectroscopy; Frenkel excitions; energy funneling
• Status: Published
• ISBN/ISSN/Other: ISSN: 1530-6992