期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 133, 期 1, 页码 208-212出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.02.019
关键词
carbon nanotube; reactive ion etching; cyclic voltammetry
In this work we fabricated 8 mm long aligned multi-walled carbon nanotube array electrodes and electrochemically deposited gold nanoparticles in a controlled manner onto the nanotube tips at the top of the array. A soldering technique was also developed to provide reliable electrical contact between the carbon nanotubes at the bottom of the array and copper on a patterned printed circuit board. The top surfaces of the nanotube tower electrodes were activated using a reactive ion etcher prior to gold deposition. Electrodeposition of Au particles on the plasma-treated tower electrodes was performed over a range of deposition times and potentials. Cyclic voltammetry and electrochemical impedance spectroscopy analyses showed that the Au-deposited carbon nanotube array electrodes were successfully fabricated. The new electrodes will be the foundation for further biosensor development using self-assembled monolayers and bio-conjugation of antibodies for novel label-free immunosensing. (c) 2008 Elsevier B.V. All rights reserved.
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