CUED Publications database

Neuromorphic device architectures with global connectivity through electrolyte gating

Gkoupidenis, P and Koutsouras, DA and Malliaras, GG (2017) Neuromorphic device architectures with global connectivity through electrolyte gating. Nature Communications, 8. 15448-.

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Information processing in the brain takes place in a network of neurons that are connected with each other by an immense number of synapses. At the same time, neurons are immersed in a common electrochemical environment, and global parameters such as concentrations of various hormones regulate the overall network function. This computational paradigm of global regulation, also known as homeoplasticity, has important implications in the overall behaviour of large neural ensembles and is barely addressed in neuromorphic device architectures. Here, we demonstrate the global control of an array of organic devices based on poly(3,4ethylenedioxythiophene):poly(styrene sulf) that are immersed in an electrolyte, a behaviour that resembles homeoplasticity phenomena of the neural environment. We use this effect to produce behaviour that is reminiscent of the coupling between local activity and global oscillations in the biological neural networks. We further show that the electrolyte establishes complex connections between individual devices, and leverage these connections to implement coincidence detection. These results demonstrate that electrolyte gating offers significant advantages for the realization of networks of neuromorphic devices of higher complexity and with minimal hardwired connectivity.

Item Type: Article
Uncontrolled Keywords: Brain Electrolytes Microtechnology Models, Neurological Nerve Net Neural Networks (Computer) Neurons Polystyrenes Synapses Thiophenes
Depositing User: Cron Job
Date Deposited: 10 Sep 2017 20:11
Last Modified: 15 Apr 2021 06:58
DOI: 10.1038/ncomms15448