| 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) | C7-9 - C7-13 | |
| DOI | https://doi.org/10.1051/jphyscol:1985702 | |
Fifth International Conference on Dynamical Processes in the Excited States of Solids / Dynamique des Etats Excités dans les Solides
J. Phys. Colloques 46 (1985) C7-9-C7-13
DOI: 10.1051/jphyscol:1985702
Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, U.S.A.
J. Phys. Colloques 46 (1985) C7-9-C7-13
DOI: 10.1051/jphyscol:1985702
FRACTAL-LIKE EXCITON KINETICS IN MEMBRANES, GLASSES AND FILMS
R. KopelmanDepartment of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, U.S.A.
Abstract
Fractal-like exciton kinetics were observed in constrained naphthalene samples : 1) Naphthalene embedded in porous glass (vycor) and various porous polymeric (e.g. nylon) membranes. 2) Grain-boundaries inside fresh and annealed naphthalene films formed by rapid, low temperature, vapor deposi tion. 3) Naphthalene embedded in "cavities" of polymeric glasses (e.g. plexiglass). The anomalous exciton annihilation kinetics gives effective spectral dimensions between one and two. Relative contributions of geometric constrains and energetic strains are obtained.