Electronic conductance and thermopower of single-molecule junctions of oligo(phenyleneethynylene) derivatives - Archive ouverte HAL Access content directly
Journal Articles Nanoscale Year : 2020

Electronic conductance and thermopower of single-molecule junctions of oligo(phenyleneethynylene) derivatives

Abstract

We report the synthesis and the single-molecule transport properties of three new oligo(phenyleneethynylene) (OPE3) derivatives possessing terminal dihydrobenzo[b]thiophene (DHBT) anchoring groups and various core substituents (phenylene, 2,5-dimethoxyphenylene and 9,10-anthracenyl). Their electronic conductance and their Seebeck coefficient have been determined using scanning tunneling microscopy-based break junction (STM-BJ) experiments between gold electrodes. The transport properties of the molecular junctions have been modelled using DFT-based computational methods which reveal a specific binding of the sulfur atom of the DHBT anchor to the electrodes. The experimentally determined Seebeck coefficient varies between −7.9 and −11.4 μV K−1 in the series and the negative sign is consistent with charge transport through the LUMO levels of the molecules.
Fichier principal
Vignette du fichier
d0nr04413j.pdf (2.33 Mo) Télécharger le fichier
d1nr90031e.pdf (317.5 Ko) Télécharger le fichier
Origin Publication funded by an institution
Licence
Licence

Dates and versions

hal-03193693 , version 1 (09-04-2021)

Licence

Identifiers

Cite

Hervé Dekkiche, Andrea Gemma, Fatemeh Tabatabaei, Andrei Batsanov, Thomas Niehaus, et al.. Electronic conductance and thermopower of single-molecule junctions of oligo(phenyleneethynylene) derivatives. Nanoscale, 2020, 12 (36), pp.18908-18917. ⟨10.1039/D0NR04413J⟩. ⟨hal-03193693⟩
45 View
67 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More