Mapping the ionic fingerprints of molecular monolayers

Lehr, J ORCID: https://orcid.org/0000-0001-5698-7244, Weeks, J, Santos, A, Feliciano, GT, Nicholson, MIG, Davis, JJ and Bueno, PR 2017, 'Mapping the ionic fingerprints of molecular monolayers' , Physical Chemistry Chemical Physics, 19 (23) , pp. 15098-15109.

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Abstract

We have previously proposed, and experimentally resolved, an ionic charge relaxation model for redox inactive self-assembled monolayers (SAMs) on metallic electrodes in contact with a liquid electrolyte. Here we analyse, by capacitance spectroscopy, the resistance and capacitance terms presented by a range of thiolated molecular films. Molecular dynamics simulations support a SAM-specific energy barrier to solution-phase ions. Once surmounted, the entrapped ions support a film embedded ionic capacitance and non-faradaic relaxation, which can be assigned as a particular case of general electrochemical capacitance.

Item Type:	Article
Schools:	Schools > School of Environment and Life Sciences > Biomedical Research Centre
Journal or Publication Title:	Physical Chemistry Chemical Physics
Publisher:	Royal Society of Chemistry
ISSN:	1463-9076
Related URLs:	Publisher
Depositing User:	J Lehr
Date Deposited:	26 Mar 2019 10:18
Last Modified:	27 Aug 2021 21:20
URI:	https://usir.salford.ac.uk/id/eprint/50509

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