Herrer, Lucia, Gonzalez-Orive, Alejandro, Marques-Gonzalez, Santiago, Martin, Santiago, Nichols, Richard J ORCID: 0000-0002-1446-8275, Luis Serrano, Jose, Low, Paul J and Cea, Pilar
(2019)
Electrically transmissive alkyne-anchored monolayers on gold.
NANOSCALE, 11 (16).
pp. 7976-7985.
Text
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Abstract
Well-ordered, tightly-packed (surface coverage 0.97 × 10-9 mol cm-2) monolayer films of 1,4-bis((4-ethynylphenyl)ethynyl)benzene (1) on gold are prepared via a simple self-assembly process, taking advantage of the ready formation of alkynyl C-Au σ-bonds. Electrochemical measurements using [Ru(NH3)6]3+, [Fe(CN)6]3-, and ferrocenylmethanol [Fe(η5-C5H4CH2OH)(η5-C5H5)] redox probes indicate that the alkynyl C-Au contacted monolayer of 1 presents a relatively low barrier for electron transfer. This contrasts with monolayer films on gold of other oligo(phenylene ethynylene) derivatives of comparable length and surface coverage, but with different contacting groups. Additionally, a low voltage transition (Vtrans = 0.51 V) from direct tunneling (rectangular barrier) to field emission (triangular barrier) is observed. This low transition voltage points to a low tunneling barrier, which is consistent with the facile electron transport observed through the C-Au contacted self-assembled monolayer of 1.
Item Type: | Article |
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Depositing User: | Symplectic Admin |
Date Deposited: | 19 Jul 2019 09:53 |
Last Modified: | 19 Jan 2023 00:37 |
DOI: | 10.1039/c8nr10464f |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3050109 |