Ultra Compact Nanoporous Platinum Coating Improves Neural Recording |
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| Authors: | Je Hyun Bae Kayeon Kim Donghoon Han Taek Dong Chung |
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| Institution: | 1. Graduate School of Analytical Science and Technology, Chungnam National University, 34134 Daejeon, Republic of Korea;2. Helsinki Institute of Life Sciences, Neuroscience Center, University of Helsinki, PO Box 63, FI-00271 Helsinki, Finland;3. Department of Chemistry, The Catholic University of Korea, 14662 Bucheon, Gyeonggi-do, Republic of Korea;4. Department of Chemistry, Seoul National University, 08826 Seoul, Republic of Korea |
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| Abstract: | Neural electrodes are key tools for achieving a successful brain-computer interface and the electrodes should be small to minimize damage to neural tissue and obtain good spatial selectivity such as single unit recording. Here we show conventional platinum/tungsten neural probes can be coated with nanoporous Pt. Thanks to nanoporous Pt with the extremely small and uniform pores, L2-ePt, the electrode impedance could be reduced by more than 2 orders of magnitude while the apparent area was almost the same. L2-ePt coating enhanced neuronal recording of local field potential in monkeys, leading to facilitating implanted electrical devices in the nervous system. |
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| Keywords: | neural recording nanoporous Pt microelectrode neural interface electrode impedance |
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