Thanks to graphene, our ability to think and see that thought become a machine’s action is just a few short years away. Researchers out of the University of Technology Sydney have been developing a new type of EEG sensor using graphene that could break down the hurdles that have prevented engineers from fully developed thought to machine action technology up to this time.
Graphene biosensor will drive new innovations in brain-controlled robotics – Physics World
From physicsworld.com
2022-02-09 09:33:53
Excerpt:
Recently, researchers have developed EEG sensors made from graphene, which offers excellent conductivity and biocompatibility. Graphene-based biosensors, however, often have low durability, corroding upon contact with sweat, and exhibit high skin-contact impedance that hampers the detection of signals from the brain. A novel graphene-based biosensor developed at the University of Technology Sydney aims to overcome these limitations, detecting EEG signals with high sensitivity and reliability – even in highly saline environments.
The sensor, described in the Journal of Neural Engineering, is made from epitaxial graphene (EG) grown on a silicon carbide (SiC)-on-silicon substrate. This structure unites graphene’s favourable properties with the physical robustness and chemical inertness of SiC.
“We’ve been able to combine the best of graphene, which is very biocompatible, very conductive, with the best of silicon technology, which makes our biosensor very resilient and robust to use,” says senior author Francesca Iacopi in a press statement.
….“With our sensor, the contact resistance improves when the sensor sits on the skin,” Iacopi explains. “Over time, we were able to achieve a reduction of more than 75% of the initial contact resistance. This means the electric signals being sent by the brain can be reliably collected and then significantly amplified, and that the sensors can also be used reliably in harsh conditions, thereby enhancing their potential for use in brain–machine interfaces.”
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