| Numéro |
J. Phys. Colloques
Volume 46, Numéro C7, Octobre 1985
Fifth International Conference on Dynamical Processes in the Excited States of Solids / Dynamique des Etats Excités dans les Solides
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|---|---|---|
| Page(s) | C7-85 - C7-90 | |
| DOI | https://doi.org/10.1051/jphyscol:1985716 | |
Fifth International Conference on Dynamical Processes in the Excited States of Solids / Dynamique des Etats Excités dans les Solides
J. Phys. Colloques 46 (1985) C7-85-C7-90
DOI: 10.1051/jphyscol:1985716
Department of Chemistry, University of Rochester, Rochester, New York 14627, U.S.A.
J. Phys. Colloques 46 (1985) C7-85-C7-90
DOI: 10.1051/jphyscol:1985716
SPATIAL PROPERTIES OF ENERGY TRANSPORT IN THREE DIMENSIONAL DISORDERED SYSTEMS
L. Gomez-Jahn, J. Kasinski et R.J. Dwayne MillerDepartment of Chemistry, University of Rochester, Rochester, New York 14627, U.S.A.
Abstract
The picosecond transient grating technique is used to directly measure the excited state energy transport diffusion constant of dye molecules in solution. The use of extremely narrow grating fringe spacings (< 980A) enabled measurement of the excitation's spatial mobility from low concentration (C = 1) where the transport is non-diffusive up to concentrations (C≈10) where the transport is essentially diffusive. The results are compared to theortical predictions for the concentration dependence of the diffusive propagation of the excitation.