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Article Dans Une Revue Advanced Electronic Materials Année : 2020

Molecular Signature and Activationless Transport in Cobalt‐Terpyridine‐Based Molecular Junctions

van Quyen Nguyen
  • Fonction : Auteur
Gaelle Trippe-Allard
Pierre Bléteau
  • Fonction : Auteur
Mathieu Bastide
Sarra Gam-Derouich
  • Fonction : Auteur
Ushula Tefashe
  • Fonction : Auteur
Maria Luisa Della Rocca
Frederic Lafolet

Résumé

The control of the interface and the adhesion process are key issues for the development of new application based on electrochromic materials. In this work the functionalization of an electrode’s surface through electroreduction of diazonium generated in situ from 4-(2,5-di-thiophen-2-yl-pyrrol-1-yl)-phenylamine (SNS-An) has been proposed. The synthesis of the aniline derivative SNS-An was performed and the electrografting was investigated by cyclic voltammetry on various electrodes. Then the organic thin film was fully characterized by several techniques and XPS analysis confirms the presence of an organic film based on the chemical composition of the starting monomer and allows an estimation of its thickness confirmed by AFM scratching measurements. Depending on the number of electrodeposition cycles, the thickness varies from 2 nm to 10 nm, which corresponds to a few grafted oligomers. In addition, the grafted film showed a good electrochemical stability depending on the scan rates up to 400 V/s and the electrochemical response of the modified electrode towards several redox probes showed that the attached layer acts as a conductive switch. Therefore, the electrode behaves as a barrier to electron transfer when the standard redox potential of the probe is below the layer switching potential, whereas the layer can be considered as transparent towards the electron transfer for redox probes with a redox potential above it.

Domaines

Chimie
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Dates et versions

hal-03293553 , version 1 (21-07-2021)

Identifiants

Citer

Thi Huong Le, van Quyen Nguyen, Gaelle Trippe-Allard, Pierre Bléteau, Mathieu Bastide, et al.. Molecular Signature and Activationless Transport in Cobalt‐Terpyridine‐Based Molecular Junctions. Advanced Electronic Materials, 2020, 6 (7), pp.1901416. ⟨10.1002/aelm.201901416⟩. ⟨hal-03293553⟩
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