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Redox-Controlled Resistive Switching in Hybrid Metal-Organic Thin Films towards Neuromorphic Computing

Project description

A library of novel materials will support the implementation of neuromorphic computing

Boolean logic centres around the idea that the output of any computation is either true or false. This simplified representation leaves a lot to be desired when one is trying to emulate the brain and its complex signal processing using Boolean logic and computer programmes. The EU-funded RESWITCH project is developing the foundations for neuromorphic computing via redox-active hybrid metal–organic coordination polymer thin films that can mimic synapses – the connections between two neurons – and their variable 'weights'. Scientists will develop a library of such materials whose conductances can vary and characterise them for ultimate exploitation in a novel device.

Objective

Cognitive computing has brought about the possibility of computer programs with ability to learn by recognizing patterns in data and to make predictions on the learned dependencies by mimicking the operation of the human brain. However, their energy efficiency is still orders of magnitude below the biological counterpart as the current linear Boolean logic is ill-suited for the simulation of the huge arrays of interconnected neurons. Neuromorphic computing aims to greatly improve the efficiency by emulating the synaptic functionality and interconnectivity on the hardware level. In biological neural networks, communication between neurons is facilitated by synapses that modulate the signal through changes in the synaptic weight. The time-variability of these operations is thought to allow the single node to both process and store information
RESWITCH seeks to emulate this synaptic plasticity by exploiting the coupled ionic/electronic transport in redox-active hybrid metal-organic coordination polymer thin films. As in fully organic conjugated polymers, the electronic conductivity can be modulated electrochemically with dynamic operation arising from the concurrent counter-ion motion. The interplay of the metal and organic constituents allows for precise control of the electric/electrochemical properties, but poor processability limits their applicability for nanotechnology applications. In RESWITCH, a new thin film -based approach is implemented with Molecular Layer Deposition (MLD). A library of MLD processes for high-quality, ultra-thin films of redox-active and electrically conductive materials will be established. The thin film approach allows for detailed exploration on the contribution of the metal and organic components to the redox-properties and conductivity. The ultimate target is to implement the thin films in a novel bilayer thin film device in which the conductance can be controlled dynamically with electrochemical doping of the adjacent layers.

Coordinator

UNIVERSITEIT GENT
Net EU contribution
€ 166 320,00
Address
SINT PIETERSNIEUWSTRAAT 25
9000 Gent
Belgium

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Region
Vlaams Gewest Prov. Oost-Vlaanderen Arr. Gent
Activity type
Higher or Secondary Education Establishments
Links
Total cost
€ 166 320,00