The nanoscopic principles of capacitive ion sensing interfaces
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2020-02-21
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Bueno, Paulo R. [UNESP]
Hein, Robert
Santos, Adriano [UNESP]
Davis, Jason J.
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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.
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Physical Chemistry Chemical Physics, v. 22, n. 7, p. 3770-3774, 2020.