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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: Poster 1

CPP 12.7: Poster

Montag, 5. September 2022, 18:00–20:00, P1

Hydrogel-based electrodes for brain wave detection — •Gökay Erbil¹, Hsin-Yin Chiang², Volker Körstgens¹, and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — ²Cephalgo, 75014 Strasbourg, France

Electroencephalography (EEG) as method for detecting brain waves is gaining importance for medical applications, since it can non-invasively provide information. Currently, both wet electrodes and dry electrodes are in use for clinical and commercial applications. With both concepts, one has to deal with certain challenges. Dry electrodes often show motion artifacts due to changes in contact and pressure applied between skin and electrode altering the signal quality. For wet electrodes on the other hand, a decrease in signal quality is usually observed with long term signal acquisitions. In this work, mussel inspired hydrogels are presented to address these challenges. The hydrogel electrodes containing tannic acid and silver nanoparticles are optimized in terms of high conductivity and adhesive properties. The elevation of brain waves collected with a headset comprised of hydrogel electrodes is demonstrated in an EEG setup for long term analysis.