Symmetry Effects on Attenuation Factors in Graphene-Based Molecular Junctions - Archive ouverte HAL Access content directly
Journal Articles Journal of Physical Chemistry Letters Year : 2017

## Symmetry Effects on Attenuation Factors in Graphene-Based Molecular Junctions

(1, 2) , (1, 2) , (1, 2) , (1, 2) , (3, 4) , (5) , (6) , (6) , (1) , (1)
1
2
3
4
5
6
Qian Zhang
Weitao Su
• Function : Author
Alexander Smogunov
• Function : Author
Yannick J Dappe
• Function : Author
Richard J. Nichols
• Function : Author
Li Yang

Connectez-vous pour contacter l'auteur

#### Abstract

Unique structural and electronic characteristics of graphene make it an attractive contact for fundamental single-molecule electrical studies. With this in mind, we have probed here the electrical conductance of a molecular junction based on $\alpha$,$\omega$-diaminoalkane chains sandwiched between a gold and a graphene electrode. Using an STM based I(s) method combined with density functional theory-based transport calculations, we demonstrate that the resulting attenuation factor turns out to be much lower when compared to the standard molecular junction between two gold electrodes. This effect is attributed to asymmetric coupling of the molecule through strong chemisorption at the gold electrode and weaker van der Waals contact at graphene. Moreover, this asymmetric coupling induces higher conductance than that in the same hybrid metal−graphene molecular junction using standard thiol anchoring groups.

#### Domains

Physics [physics]

### Dates and versions

cea-01687065 , version 1 (18-01-2018)

### Identifiers

• HAL Id : cea-01687065 , version 1
• DOI :

### Cite

Qian Zhang, Shuhui Tao, Ruowei Yi, Chunhui He, Cezhou Zhao, et al.. Symmetry Effects on Attenuation Factors in Graphene-Based Molecular Junctions. Journal of Physical Chemistry Letters, 2017, 8, pp.5987 - 5992. ⟨10.1021/acs.jpclett.7b02822⟩. ⟨cea-01687065⟩

### Export

BibTeX TEI Dublin Core DC Terms EndNote Datacite

50 View