Issue 23, 2017

Mapping the ionic fingerprints of molecular monolayers

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.

Graphical abstract: Mapping the ionic fingerprints of molecular monolayers

Article information

Article type
Paper
Submitted
08 Mac 2017
Accepted
12 Mei 2017
First published
12 Mei 2017

Phys. Chem. Chem. Phys., 2017,19, 15098-15109

Mapping the ionic fingerprints of molecular monolayers

J. Lehr, J. R. Weeks, A. Santos, G. T. Feliciano, M. I. G. Nicholson, J. J. Davis and P. R. Bueno, Phys. Chem. Chem. Phys., 2017, 19, 15098 DOI: 10.1039/C7CP01500C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements