Fiche publication
Date publication
mai 2015
Journal
ACS applied materials & interfaces
Auteurs
Membres identifiés du Cancéropôle Est :
Dr NICOLAI Adrien
Tous les auteurs :
Saha S, Nicolaï A, Owens JR, Krawicz A, Dinolfo PH, Meunier V, Lewis KM
Lien Pubmed
Résumé
We report bistability in current-voltage curves from di(PEP)PorZn in an electromigrated molecular junction. Bistability was observed at ±0.3 V at 300 K but did not occur at 4 K. No bistability was identified at 300 K for another porphyrin molecule (di(Xyl)PorZn), where the phenyl-ethnyl-phenyl (PEP) side groups were replaced with a flexible p-xylene. Molecular dynamics simulations show that bistability may be due to conformation changes related to the fluctuation of the dihedral angle surrounding the zinc and/or the rotation of the porphyrin central plane of the molecule. Results suggest that other mechanisms may play a role in the current-voltage characteristics observed.
Mots clés
bistability, electromigration, molecular dynamic simulations, molecular junctions, porphyrin, temperature dependence
Référence
ACS Appl Mater Interfaces. 2015 05 20;7(19):10085-90
