Pressure-gated memristor based on a microfluidic channel Alexander Barnaveli , Tim Kamsma, Willem Boon and René van Roij Utrecht University, Netherlands We theoretically study cyclic voltammetry of a microfluidic conical channel filled with an aqueous electrolyte (Fig.1) under the influence of an externally applied time-dependent voltage and pressure. It was recently demonstrated in our group [1] that a conical channel exhibits memristive properties if it is solely driven by an AC voltage; this is due to an enhanced/reduced salt concentration (and hence conductivity) during different phases of the driving period. We also showed already that the conductivity of conical channels is extremely sensitive to an applied static pressure drop [2] , i.e. conical channels are transistors gated by pressure rather than by voltage. In this poster we present the results of employing simultaneously applied time-dependent voltages and pressures to study the suppression or enhancement of the memristive properties of conical channels by pressure. Such an additional control over memristive effects introduces a completely new (hydraulic) way of manipulating neuromorphic circuits based on conical pores. One of the interesting consequences of having two control mechanisms in such circuits is the increased bandwidth, since electric and hydraulic signaling is possible in parallel. References 1. Kamsma, T. M., W. Q. Boon, T. ter Rele, C. Spitoni, and R. van Roij. "Iontronic neuromorphic signalling with conical microfluidic memristors." arXiv preprint arXiv:2301.06158 (2023). 2. Boon, Willem Q., Tim E. Veenstra, Marjolein Dijkstra, and René van Roij. "Pressure-sensitive ion conduction in a conical channel: Optimal pressure and geometry." Physics of Fluids 34, no. 10 (2022): 101701.
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