Probing charge transfer dynamics in a single iron tetraphenylporphyrin dyad adsorbed on an insulating surface - NANOPHYS Accéder directement au contenu
Article Dans Une Revue Nanoscale Année : 2018

Probing charge transfer dynamics in a single iron tetraphenylporphyrin dyad adsorbed on an insulating surface

Résumé

Although the dynamics of charge transfer (CT) processes can be probed with ultimate lifetime resolution, the inability to control CT at the nanoscale is one of the most important roadblocks to revealing some of its deep fundamental aspects. In this work, we present an investigation of CT dynamics in a single iron tetraphenylporphyrin (Fe-TPP) donor/acceptor dyad adsorbed on a CaF2/Si(100) insulating surface. The tip of a scanning tunneling microscope (STM) is used to create local ionic states in one fragment of the dyad. The CT process is monitored by imaging subsequent changes in the neighbor acceptor molecule and its efficiency is mapped, revealing the influence of the initial excited state in the donor molecule. In the validation of the experiments, simulations based on density functional theory show that holes have a higher donor–acceptor CT rate compared to electrons and highlight a noticeable initial state dependence on the CT process. We leverage the unprecedented spatial resolution achieved in our experiments to show that the CT process in the dyad is governed via molecule–molecule coherent tunneling with negligible surface-mediated character.
Fichier principal
Vignette du fichier
1807.01876.pdf (1.79 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04517599 , version 1 (27-03-2024)

Identifiants

Citer

Pablo Ramos, Marc Mankarious, Michele Pavanello, Damien Riedel. Probing charge transfer dynamics in a single iron tetraphenylporphyrin dyad adsorbed on an insulating surface. Nanoscale, 2018, 10 (37), pp.17603-17616. ⟨10.1039/c8nr05424j⟩. ⟨hal-04517599⟩
16 Consultations
4 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More