Power-law-distributed dark states are the main pathway for photobleaching of single organic molecules
Hoogenboom, Jacob P. (Institute for Nanotechnology (Enschede, Països Baixos))
van Dijk, Erik M. H. P. (Institute for Nanotechnology (Enschede, Països Baixos))
Hernando Campos, Jordi (Institute for Nanotechnology (Enschede, Països Baixos))
van Hulst, Niek F.. (Institute for Nanotechnology (Enschede, Països Baixos))
García Parajó, María F.. (Institute for Nanotechnology (Enschede, Països Baixos))

Data:	2005
Resum:	We exploit the strong excitonic coupling in a superradiant trimer molecule to distinguish between long-lived collective dark states and photobleaching events. The population and depopulation kinetics of the dark states in a single molecule follow power-law statistics over 5 orders of magnitude in time. This result is consistent with the formation of a radical unit via electron tunneling to a time-varying distribution of trapping sites in the surrounding polymer matrix. We furthermore demonstrate that this radicalization process forms the dominant pathway for molecular photobleaching.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; Versió publicada
Publicat a:	Physical review letters, Vol. 95, Issue 9 (August 2005) , p. 097401, ISSN 1079-7114

DOI: 10.1103/PhysRevLett.95.097401

4 p, 253.5 KB

El registre apareix a les col·leccions:
Articles > Articles publicats