Loading…

A Retina‐Inspired Optoelectronic Synapse Using Quantum Dots for Neuromorphic Photostimulation of Neurons

Neuromorphic electronics, inspired by the functions of neurons, have the potential to enable biomimetic communication with cells. Such systems require operation in aqueous environments, generation of sufficient levels of ionic currents for neurostimulation, and plasticity. However, their implementat...

Full description

Saved in:
Bibliographic Details
Published in:Advanced science 2024-05, Vol.11 (20), p.e2306097-n/a
Main Authors: Balamur, Ridvan, Eren, Guncem Ozgun, Kaleli, Humeyra Nur, Karatum, Onuralp, Kaya, Lokman, Hasanreisoglu, Murat, Nizamoglu, Sedat
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Neuromorphic electronics, inspired by the functions of neurons, have the potential to enable biomimetic communication with cells. Such systems require operation in aqueous environments, generation of sufficient levels of ionic currents for neurostimulation, and plasticity. However, their implementation requires a combination of separate devices, such as sensors, organic synaptic transistors, and stimulation electrodes. Here, a compact neuromorphic synapse that combines photodetection, memory, and neurostimulation functionalities all‐in‐one is presented. The artificial photoreception is facilitated by a photovoltaic device based on cell‐interfacing InP/ZnS quantum dots, which induces photo‐faradaic charge‐transfer mediated plasticity. The device sends excitatory post‐synaptic currents exhibiting paired‐pulse facilitation and post‐tetanic potentiation to the hippocampal neurons via the biohybrid synapse. The electrophysiological recordings indicate modulation of the probability of action potential firing due to biomimetic temporal summation of excitatory post‐synaptic currents. These results pave the way for the development of novel bioinspired neuroprosthetics and soft robotics, and highlight the potential of quantum dots for achieving versatile neuromorphic functionality in aqueous environments. In this work, a compact neuromorphic synapse that combines photodetection, memory, and neurostimulation functionalities all‐in‐one is presented. The photovoltaic device based on cell‐interfacing InP/ZnS quantum dots induces photo‐faradaic charge‐transfer mediated plasticity. The electrophysiological recordings indicate modulation of the probability of action potential firing due to biomimetic temporal summation of excitatory post‐synaptic currents.
ISSN:2198-3844
2198-3844
DOI:10.1002/advs.202306097