Enhancing Flexible Neural Probe Performance via Platinum Deposition: Impedance Stability under Various Conditions and In Vivo Neural Signal Monitoring.
作者信息
Park Daerl, Jeong Hyeonyeong, Choi Jungsik, Han Juyeon, Piao Honglin, Kim Jaehyun, Park Seonghoon, Song Mingu, Kim Dowoo, Sung Jaesuk, Cheong Eunji, Choi Heonjin
机构信息
Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea.
Department of Biotechnology, Yonsei University, Seoul 03722, Republic of Korea.
出版信息
Micromachines (Basel). 2024 Aug 22;15(8):1058. doi: 10.3390/mi15081058.
Monitoring neural activity in the central nervous system often utilizes silicon-based microelectromechanical system (MEMS) probes. Despite their effectiveness in monitoring, these probes have a fragility issue, limiting their application across various fields. This study introduces flexible printed circuit board (FPCB) neural probes characterized by robust mechanical and electrical properties. The probes demonstrate low impedance after platinum coating, making them suitable for multiunit recordings in awake animals. This capability allows for the simultaneous monitoring of a large population of neurons in the brain, including cluster data. Additionally, these probes exhibit no fractures, mechanical failures, or electrical issues during repeated-bending tests, both during handling and monitoring. Despite the possibility of using this neural probe for signal measurement in awake animals, simply applying a platinum coating may encounter difficulties in chronic tests and other applications. Furthermore, this suggests that FPCB probes can be advanced by any method and serve as an appropriate type of tailorable neural probes for monitoring neural systems in awake animals.