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Orientation dependence of fluorescence lifetimes near an interface

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48224

Kreiter,  Maximilian
MPI for Polymer Research, Max Planck Society;

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Zitation

Kreiter, M., Prummer, M., Hecht, B., & Wild, U. P. (2002). Orientation dependence of fluorescence lifetimes near an interface. Journal of Chemical Physics, 117(20), 9430-9433.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-6496-7
Zusammenfassung
The fluorescence lifetime of single DiI-dye molecules in a 20 nm polymer film on glass is measured as a function of the orientation of the absorption dipole moment. A strong dependence of the lifetime on the orientation of the dye molecules relative to the polymer/air interface is found. Molecules with a dipole moment perpendicular to the interface exhibit a lifetime which is by a factor of 2.1+/-0.1 longer than the lifetime of molecules with parallel dipole moments. The general trend of the results is in good agreement with theoretical predictions. However there are significant deviations which are attributed to varying molecular environments. (C) 2002 American Institute of Physics.