A cone-shaped 3D carbon nanotube probe for neural recording

作者：Su Huan Chieh; Lin Chia Min; Yen Shiang Jie; Chen Yung Chan; Chen Chang Hsiao; Yeh Shih Rung; Fang Weileun; Chen Hsin; Yao Da Jeng; Chang Yen Chung; Yew Tri Rung^*

来源：Biosensors and Bioelectronics, 2010, 26(1): 220-227.

DOI：10.1016/j.bios.2010.06.015

• Carbon nanotubes
• Neural probe
• O(2) plasma treatment
• Neural recording

A novel cone-shaped 3D carbon nanotube (CNT) probe is proposed as an electrode for applications in neural recording The electrode consists of CNTs synthesized on the cone-shaped Si (cs-Si) tip by catalytic thermal chemical vapor deposition (CVD) This probe exhibits a larger CNT surface area with the same footprint area and higher spatial resolution of neural recording compared to planar-type CNT electrodes An approach to improve CNT characteristics by O(2) plasma treatment to modify the CNT surface will be also presented. Electrochemical characterization of O(2) plasma-treated 3D CNT (OT-CNT) probes revealed low impedance per unit area (similar to 64 5 Omega mm(-2)) at 1 kHz and high specific capacitance per unit area (similar to 2.5 mFcm(-2)). Furthermore, the OT-CNT probes were employed to record the neural signals of a crayfish nerve cord Our findings suggest that

• 出版日期2010-9-15
• 单位中国科学院电工研究所; 清华大学