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Issue 7, 2020

The nanoscopic principles of capacitive ion sensing interfaces

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Abstract

Herein we discuss the operational principles of molecular interfaces that specifically recruit ions from an electrolyte solution and report this in a reagentless capacitive manner. At low ionic occupancy the response of the interface obeys a Debye-type phenomenon akin to classic “image charge” effects. At higher levels of occupancy, the response follows Thomas–Fermi screening and, significantly, is dependent on the electronic structure of the mesoscopic ion–receptor host–guest ensemble.

Graphical abstract: The nanoscopic principles of capacitive ion sensing interfaces

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Article information


Submitted
11 Oct 2019
Accepted
20 Jan 2020
First published
20 Jan 2020

Phys. Chem. Chem. Phys., 2020,22, 3770-3774
Article type
Communication

The nanoscopic principles of capacitive ion sensing interfaces

P. R. Bueno, R. Hein, A. Santos and J. J. Davis, Phys. Chem. Chem. Phys., 2020, 22, 3770 DOI: 10.1039/C9CP05543F

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