Code Multiplexed Nanocapacitor Arrays for Scalable Neural Recordings

Sean Weaver, Yiyang Chen, Aline Renz, Woojun Choi, Yashwanth Vyza, Tilman Schlotter, Katarina Vulić, Donghwan Kim, Gabriele Atzeni, Dmitry Momotenko, Nako Nakatsuka, Taekwang Jang, János Vörös
2024 · doi:10.1101/2024.02.22.581578
preprint OA: closed CC-BY-NC-ND-4.0
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Abstract

Large scale neural recordings are redefining our understanding of the brain. However, simultaneously recording potentials from thousands of microelectrodes remains challenging. We overcome this limitation by measuring activity-induced changes in mutual capacitance. Code division multiplexing enabled simultaneous recordings of neural activity from 1,024 nanocapacitor electrodes at a density of 10k electrodes/mm. 2 Features of neural activity i . e ., action potentials, bursts, and local field potentials were measured in recordings, benchmarking our device against the state-of-the-art. Summary Capacitive sensing of neural activity improves the scalability, fabrication, and miniaturization of microelectrode arrays.

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License: CC-BY-NC-ND-4.0