Advanced iontronic spiking modes with multiscale diffusive dynamics in a fluidic circuit
Neuromorphic Computing and Engineering(2024)
摘要
Fluidic iontronics is emerging as a distinctive platform for implementing
neuromorphic circuits, characterized by its reliance on the same aqueous medium
and ionic signal carriers as the brain. Drawing upon recent theoretical
advancements in both iontronic spiking circuits and in dynamic transport of
aqueous electrolytes through conical ion channels, which form fluidic
memristors, we expand the repertoire of proposed neuronal spiking dynamics in
iontronic circuits. Through a modelled circuit containing channels that carry a
bipolar surface charge, we extract phasic bursting, mixed-mode spiking, tonic
bursting, and threshold variability, all with spike voltages and frequencies
within the typical range for mammalian neurons. These features are possible due
to the strong dependence of the typical conductance memory retention time on
the channel length, enabling timescales varying from individual spikes to
bursts of multiple spikes within a single circuit. These advanced forms of
neuronal-like spiking support the exploration of aqueous iontronics as an
interesting platform for neuromorphic circuits.
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关键词
iontronic spiking,ion channel memristor,microfluidic circuit,tonic bursting,phasic bursting,mixed mode spiking
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