Light-sensitive materials mimic synapses in the brain

Light-sensitive materials mimic synapses in the brain

Schematics and Properties of the Proposed Opect. A) Schematic representation of the opect Architecture Comprising a photo-responsive gate functionalized with azobenzene-based molecules and a spin-coated pedot: PSS Channel. B) UV -Vis absorbance spectra of the gate electrodes functionalized with three different azobenzene derivatives. C) Time-Dependent Evolution of the absorbance spectra upon uv illumination (λ = 365 nm, intensity = 0.31 mw CM—2), showing the photoisomerization behavior of the azobenzene-defdition. D) Surface and Bulk capacitance of the functionalized films, extracased by fitting impedance spectroscopy data account in Dark Using The Equivalent Circuit Shown in the Inset. Credit: Advanced Science (2025). Doi: 10.1002/advs.202509125

An Interdisciplinary Research Team has Engineered a new class of Organic PhotoLeCEMICAL Transistors (Opects). These tiny devices can convert lighting into electrical signs and mimic the behavior of synapses in the brain. The Research Results Have Now Been Published in the research journey Advanced Science,

The team involved professor francsca santoro and Dr. Valeria criscuolo from the institute of biological information processing – bioelectronics at forschungszentrum jülich, in cooperation with colleagues from rwth aach aach aachen university – Prafeesor Danielie Leoniry And Junior Professor Giovanni Maria Piccini (Now University of Modena and Reggio Emilia).

Our brains work by passing Signals Between Nerve Cells, Adapting over time to learn and remember. Scientists are trying to recreate this kind of behavior in electronic devices, a field known as neuromorphic electronics. One way to do this is by developing materials that can “learn” in similar ways to how the brain does.

The team from jülich and aachen has taken an important step forward in this field. What makes their new technology special is that its properties can be preachisely adjusted using chemistry. This means the material can be tailored to be particularly sensitive to light or definitely to transmit signs

This opens up numerous potential applications: the platform could serve as an interface between technology and nerve cells, for example in visual prostheses or other medical devices. Highly sensitive optical sensors and novel brain – Machine interfaces are also possible. Another advantage is that the components have low power consumption and can be adapted flexible to different requirements.

In order for the device to be used later with real nerve cells or eye tissue, the material must be biocompatible – In other words, compatible with the human body –and fountains at Body Tamperate. The researchers therefore use a special plastic called Pedot: pss, which has been modified with light-sensitive molecules. This Material Conducts Electricity While Remining Soft and Flexible, Making it Suitable for Use at the Interface Between Electronics and Biological Tissue.

In the long term, this research could pay the way for new approaches to treating retinal diseases, such as age-Related visual disorders. However, before it can be used in medicine, the technology must be tested carefully to ensure it is compatible with living tissue. To do so, the results carry out in vitro analyses – Laboratory Tests Performed Outside The Body –and Examine NERVE TISSUE, Among other things.

More information:
Isabela Berndt Paro et al, designing light -sensitive organic semiconductors with azobenzenes for photoelectrochemical transistors as neuromorphic platforms, Advanced Science (2025). Doi: 10.1002/advs.202509125

Provided by jülich research center


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