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The Retina

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The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.

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Optical Control of Living Cells Electrical Activity by Conjugated Polymers

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Published on: January 28, 2016

Modulating synaptic plasticity with metal-organic framework for information-filterable artificial retina.

Seongchan Kim¹, Ohchan Kwon^2,3, Seonkwon Kim²

¹Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, USA.

Nature Communications

|January 2, 2025

Summary

This study introduces an artificial retina using metal-organic frameworks (MOFs) for neuroprosthetics. The system filters information by mimicking attention, enhancing signal processing for sensory disorders.

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Published on: February 25, 2022

Area of Science:

Materials Science
Neuroscience
Artificial Intelligence

Background:

Neuroprosthetics require advanced signal processing to differentiate important from irrelevant sensory information.
Artificial synapses are crucial for developing sophisticated neuroprosthetic systems.

Purpose of the Study:

To develop an information-filterable artificial retina system with artificial synapses for enhanced signal perception and processing.
To investigate the role of metal-organic framework (MOF) properties in modulating synaptic behavior for attention-based processing.

Main Methods:

Systematic examination of four isoreticular Zr-based MOFs with varying pore diameters and functionalities.
Integration of short-term and long-term artificial synapses, utilizing MOF layers, with a signal-integration device.
Development of a 6x6 pixel artificial retina demonstrating attention-based information processing through signal summation.

Main Results:

MOF pore diameter and functionality dictate short-term and long-term synaptic properties.
Small pore diameters in MOFs enhance short-term synaptic characteristics.
Large pore diameters and increased ion affinity in MOFs sustain long-term synaptic properties.

Conclusions:

The developed artificial retina system effectively emulates human attention-based perception processes.
This technology shows significant potential for applications in neuroprosthetics and advanced artificial intelligence.
Tailoring MOF properties offers a pathway to creating advanced artificial synaptic systems.