IN-PERSON EVENT
PhD: Georgios Alexandros Katirtsidis
Directors:
I CREA Prof. Jose Antonio Garrido &\; Dr Eduard Masvidal
Graphene-b ased thin-film technology offers great potential for next-generation neura l interfaces\, but long-term reliability remains challenging due to encaps ulation instability in physiological environments. This study presents a h ybrid polyimide (PI)/ALD-Al₂O₃ encapsulation integrated with nanoporou s reduced graphene oxide (rGO) microelectrodes. The encapsulation demonstr ated excellent stability after accelerated aging equivalent to approximate ly 2.5 years in phosphate-buffered saline (PBS) at 57 °C and thousands of bending cycles.
Nanoporous rGO microelectrodes maintained their str uctural integrity and electrochemical performance after 531 days in PBS\, 2 billion stimulation pulses\, and repeated mechanical bending. Chronic im plantation in rats demonstrated stable bidirectional recording and stimula tion for over three months. Furthermore\, acute implantation in a porcine model enabled successful subcortical and epicortical neural recordings. In tegration with a magneto-robotic implantation strategy further highlights the potential for minimally invasive applications. These results establish a promising platform for chronic neural monitoring and neuromodulation.
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DTSTART:20261118T090000 DTEND:20261118T110000 LOCATION:ICN2 Seminar Room CATEGORIES:ICN2 Theses Defence END:VEVENT END:VCALENDAR