Stochastic dynamics of resonance electronic energy transfer in bidimensional overexcited molecular ensembles
Langue
en
Article de revue
Ce document a été publié dans
Physical Review B. 2023-11-17, vol. 108, n° 20, p. 205419
American Physical Society
Résumé en anglais
We investigate theoretically the stochastic dynamics of Resonance Electronic Energy Transfer (RET), in a bi-dimensional overexcited ensemble of donor and acceptor molecules. We find that, after initial optical excitation ...Lire la suite >
We investigate theoretically the stochastic dynamics of Resonance Electronic Energy Transfer (RET), in a bi-dimensional overexcited ensemble of donor and acceptor molecules. We find that, after initial optical excitation of all the donors, the reaction kinetics is well-described by a nonlinear mean-field theory. The latter provides a solid way to define and compute an effective rate of RET, even for disordered samples. We predict that this effective rate scales as R α with R the average distance between individual excited donors and their nearest-neighbor acceptor molecules, and α ∈ [−6, −2] an exponent depending on the spatial distribution of molecular pairs in the sample. Using a kinetic Monte-Carlo approach, we show departures from this macroscopic meanfield description arising from fluctuations and spatial correlations between several molecules involved in the RET process. We expect this prediction to be relevant for both molecular science and biology, where the control and optimization of the RET dynamics is a key issue.< Réduire
Mots clés en anglais
Chemical kinetics
Fluorescent biomolecules
Stochastic processes
2-dimensional systems
Aggregates
Nanostructures
Monte Carlo Methods
Project ANR
Réactions Chimiques, Transfert de Charges et d'Energie en Cavité Electromagnétique - ANR-18-CE30-0006
Origine
Importé de halUnités de recherche