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KMID : 1144120230130020111
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Biomedical Engineering Letters
2023 Volume.13 No. 2 p.111 ~ p.118
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Polymer nanofiber network reinforced gold electrode array for neural activity recording
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Siting Yang
Ke Xu
Shouliang Guan
Liang Zou
Lei Gao
Jinfen Wang
Huihui Tian
Hui Li
Ying Fang
Hongbian Li
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Abstract
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Flexible and stretchable neural electrodes are promising tools for high-fidelity interfacing with soft and curvilinear brain surface. Here, we describe a flexible and stretchable neural electrode array that consists of polyacrylonitrile (PAN) nanofiber network reinforced gold (Au) film electrodes. Under stretching, the interweaving PAN nanofibers effectively terminate the formation of propagating cracks in the Au films and thus enable the formation of a dynamically stable electrode-tissue interface. Moreover, the PAN nanofibers increase the surface roughness and active surface areas of the Au electrodes, leading to reduced electrochemical impedance and improved signal-to-noise ratio. As a result, PAN nanofiber network reinforced Au electrode arrays can allow for reliable in vivo multichannel recording of epileptiform activities in rats.
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KEYWORD
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Nanofber network, Impedance, Electrocorticography, Brain ativity, Epileptiform
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