Neuromorphic responses of nanofluidic memristors in symmetric and asymmetric ionic solutions

We show that ionic conduction properties of a multipore nanofluidic memristor can be controlled not only by the amplitude and frequency of an external driving signal but also by chemical gating based on the electrolyte concentration, presence of divalent and trivalent cations, and multi-ionic system...

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Bibliographic Details
Published inThe Journal of chemical physics Vol. 160; no. 4
Main Authors Ramirez, Patricio, Portillo, Sergio, Cervera, Javier, Nasir, Saima, Ali, Mubarak, Ensinger, Wolfgang, Mafe, Salvador
Format Journal Article
LanguageEnglish
Published United States 28.01.2024
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Summary:We show that ionic conduction properties of a multipore nanofluidic memristor can be controlled not only by the amplitude and frequency of an external driving signal but also by chemical gating based on the electrolyte concentration, presence of divalent and trivalent cations, and multi-ionic systems in single and mixed electrolytes. In addition, we describe the modulation of current rectification and hysteresis phenomena, together with neuromorphic conductance responses to voltage pulses, in symmetric and asymmetric external solutions. In our case, memristor conical pores act as nanofluidic diodes modulated by ionic solution characteristics due to the surface charge-regulated ionic transport. The above facts suggest potential sensing and actuating applications based on the conversion between ionic and electronic signals in bioelectrochemical hybrid circuits.
ISSN:1089-7690
DOI:10.1063/5.0188940