Naslov
Micropyramid structured photo capacitive interfaces

Autori
Nikić, Marta ; Opančar, Aleksandar ; Hartmann, Florian ; Migliaccio, Ludovico ; Jakešová, Marie ; Głowacki, Eric Daniel ; Đerek, Vedran

Izvornik
Nanotechnology (0957-4484) 33 (2022), 24; 245302, 9

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
parylene, bioelectronic, micropyramid, mould

Sažetak
Optically driven electronic neuromodulation devices are a novel tool in basic research and offer new prospects in medical therapeutic applications. Optimal operation of such devices requires efficient light capture and charge generation, effective electrical communication across the device’s bioelectronic interface, conformal adhesion to the target tissue, and mechanical stability of the device during the lifetime of the implant—all of which can be tuned by spatial structuring of the device. We demonstrate a 3D structured opto-bioelectronic device—an organic electrolytic photocapacitor spatially designed by depositing the active device layers on an inverted micropyramid-shaped substrate. Ultrathin, transparent, and flexible micropyramidshaped foil was fabricated by chemical vapour deposition of parylene C on silicon moulds containing arrays of inverted micropyramids, followed by a peel-off procedure. The capacitive current delivered by the devices showed a strong dependency on the underlying spatial structure. The device performance was evaluated by numerical modelling. We propose that the developed numerical model can be used as a basis for the design of future functional 3D design of optobioelectronic devices and electrodes.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Interdisciplinarne biotehničke znanosti, Biotehnologija u biomedicini (prirodno područje, biomedicina i zdravstvo, biotehničko područje)

POVEZANOST RADA