The fabrication of nanoelectrodes based on a single carbon nanotube.
Nanoelectrodes are fabricated from individual carbon nanotubes (CNTs) connected to tungsten probes or carbon fibers. The whole electrode was covered by an insulating HfO(2) layer except for a section of conducting CNT at the apex. The fabrication process includes mounting individual CNTs to the conductive support through nanomanipulation, coating the whole probe by a dielectric layer using atomic layer deposition and removing the dielectric layer at the apex through a nanomanipulation process. Differential pulse voltammetry and cyclic voltammetry measurements show the CNT nanoelectrode has similar electrochemical behavior to the widely used carbon fiber probe, but has a much smaller active electrode area and can provide much higher spatial resolution and signal-to-noise ratio.
Shen
Jun
J
Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, People's Republic of China. shenj@pku.edu.cn
Wang
Wei
W
Chen
Qing
Q
Wang
Mingsheng
M
Xu
Shengyong
S
Zhou
Yinglin
Y
Zhang
Xin-Xiang
XX
D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008839:Microelectrodes; D008968:Molecular Conformation; D036103:Nanotechnology / Q000295:instrumentation*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
D046911:Macromolecular Substances