Magnetic assembly of microwires on a flexible substrate for minimally invasive electrophysiological recording

Understanding the neural system in the brain requires the detection of signals from the tissue. Microscale electrodes enable high spatiotemporal neural recording, whereas traditional microelectrodes cause material and geometry mismatches between the electrode and the tissue, leading to injury and si...

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Bibliographic Details
Published in:Biosensors & bioelectronics 2025-03, Vol.271, p.116927, Article 116927
Main Authors: Sieng, Claire King Teck, Yi, Chan Jun, Yasui, Taiki, Yamashita, Koji, Sanda, Rioki, Sakamoto, Kensei, Kondo, Yuki, Suzuki, Ko, Idogawa, Shinnosuke, Seikoba, Yu, Numano, Rika, Koida, Kowa, Kawano, Takeshi
Format: Article
Language:English
Subjects:
Magnet
Microwire
Neural recording
Neuron
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Summary:Understanding the neural system in the brain requires the detection of signals from the tissue. Microscale electrodes enable high spatiotemporal neural recording, whereas traditional microelectrodes cause material and geometry mismatches between the electrode and the tissue, leading to injury and signal loss during recording. In this study, we propose a fabrication technique that uses magnetic force to facilitate assembly of vertical microscale wire-electrodes on a flexible substrate. Two-channel 15-μm-diameter and 400-μm-length nickel-microwire electrodes on a 5-μm-thick flexible parylene film are designed and fabricated. Impedance characteristics of these electrodes are
ISSN:0956-5663
1873-4235
1873-4235
DOI:10.1016/j.bios.2024.116927