基于多层石墨烯的MEMS兼容的神经探针用于刺激和记录
Kejun Tu1,2, Longchun Wang1, Hao Chen3,4
1National Key Laboratory of Advanced Micro and Nano Manufacture Technology, Shanghai Jiao Tong University, Shanghai, 200240, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 26, 2025
概括
研究人员开发了一种使用多层石墨烯 (MLG) 的新型无金属神经探针,以提高MRI兼容性和电化学性能. 这种石墨烯神经探测器为先进的神经成像和脑电脑接口提供了突破.
科学领域:
- 生物电子
- 材料科学
- 神经科学
背景情况:
- 传统的金属神经探针会造成MRI装置和热风险.
- 功能性神经成像需要改进的神经接口材料.
研究的目的:
- 开发用于MRI集成应用的无金属神经探针.
- 为了提高神经记录的电化学性能和生物相容性.
主要方法:
- 在聚胺上使用旋转喷雾沉积制造多层石墨烯 (MLG) 神经探针.
- 电化学性质 (电荷储存能力,注入极限) 和机械性质 (模量) 的表征.
- 在小鼠海马体中评估MRI兼容性 (易感元件,射频诱导的加热) 和长期的体内性能.
主要成果:
- 与黄金电极相比,MLG探测器显示电荷储存能力和注射极限显著提高.
- 探测器显示了最小的MRI器件和RF诱导的加热 (在9.4T时<0.4°C).
- 在体内维持了6个月的稳定电生理性能,阻抗偏移低.
结论:
- MLG神经探针具有卓越的电化学效率和MRI兼容性.
- 这种无金属探测器是先进的MRI集成神经接口的有前途的工具.
- 基于石墨烯的材料具有未来生物电子应用的巨大潜力.
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