Carbon-contacted single molecule electrical junctions

He, Chunhui, Zhang, Qian, Tao, Shuhui, Zhao, Cezhou, Zhao, Chun, Su, Weitao, Dappe, Yannick J, Nichols, Richard J ORCID: 0000-0002-1446-8275 and Yang, Li ORCID: 0000-0002-1040-4223 (2018) Carbon-contacted single molecule electrical junctions. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 20 (38). pp. 24553-24560.

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Li Yang Qian AUTHOR ACCEPTED VERSION Carbon Contacted Junctions PCCP 6-19-no tracked change.pdf - Author Accepted Manuscript
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Official URL: http://dx.doi.org/10.1039/c8cp02877j

Abstract

A fully metal-free molecular junction (MJ) has been built by using an electrochemically etched carbon fibre STM tip as the top electrode and graphene as the bottom electrode. The corresponding conductance values for 1,n-alkanediamine and 1,n-alkanedithiol (n = 2, 4, 6, 8 and 10) have been measured using the STM-I(s) technique. The tunnelling decay constant of the alkanediamine and alkanedithiol junctions with these carbon contacts is much lower than the corresponding metal contacted junctions of 0.24 and 0.38 per -CH2 unit, but the junction conductance with these carbon contacts is also lower. The carbon fibre tip can be considered a good candidate as an electrode. Compared with a gold tip, the carbon fibre tip leads to correspondingly lower molecular junction conductance.

Item Type:	Article
Depositing User:	Symplectic Admin
Date Deposited:	13 Sep 2018 13:09
Last Modified:	19 Jan 2023 01:17
DOI:	10.1039/c8cp02877j
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3026240