Fabrication and characterization of carbon nanotube array electrodes with gold nanoparticle tips

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...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Vol. 133; no. 1; pp. 208 - 212
Main Authors: Yun, YeoHeung, Dong, Zhongyun, Shanov, Vesselin N., Doepke, Amos, Heineman, William R., Halsall, H. Brian, Bhattacharya, Amit, Wong, Danny K.Y., Schulz, Mark J.
Format: Journal Article
Language:English
Published: Elsevier B.V 28.07.2008
Subjects:
Carbon nanotube
Cyclic voltammetry
Reactive ion etching
Carbon nanotube
Cyclic voltammetry
Reactive ion etching
ISSN:0925-4005, 1873-3077
Online Access:Get full text
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Summary: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.
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ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2008.02.019