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Wafer-Scale Graphene-Based Soft Electrode Array with Optogenetic Compatibility

 
: Velea, Andrada Iulia; Vollebregt, Sten; Wardhand, Gandhika K.; Giagka, Vasiliki

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Institute of Electrical and Electronics Engineers -IEEE-:
IEEE 33rd International Conference on Micro Electro Mechanical Systems, MEMS 2020 : Vancouver, Canada, January 18-22, 2020
Piscataway, NJ: IEEE, 2020
ISBN: 978-1-7281-3581-6
ISBN: 978-1-7281-3580-9
ISBN: 978-1-7281-3582-3
pp.421-424
International Conference on Micro Electro Mechanical Systems (MEMS) <33, 2020, Vancouver>
English
Conference Paper
Fraunhofer IZM ()

Abstract
This paper reports on the characterization of a microfabricated wafer-scale, graphene-based, soft implant for spinal cord applications. Graphene is used because of its high transparency and good conductivity, making it suitable for optogenetic applications. Moreover it has a high mechanical strength and is potentially biocompatible. The implant consists of multi-layered chemical vapor deposited graphene, in the form of electrodes and tracks, encapsulated between 2 layers of silicone. Methods such as Raman spectroscopy, optical transmittance, and electrical measurements combined with bending tests and in-vitro experiments, using phosphate-buffered saline (PBS) solution, were employed to characterize the device. The results have shown high bendability and no critical damage of the graphene after immersing the device in PBS solution up to 7 days. To the authors' best knowledge, this is the first work that presents a soft and fully scalable optogenetics-compatible graphene- based spinal cord electrode array.

: http://publica.fraunhofer.de/documents/N-596190.html