Journal article
Investigation of parameters controlling the dielectrophoretic assembly of carbon nanotubes on microelectrodes
Nano-Bio Integrated Systems Group, Biomedical Micro Systems Section, Department of Micro- and Nanotechnology, Technical University of Denmark1
Biomedical Micro Systems Section, Department of Micro- and Nanotechnology, Technical University of Denmark2
Department of Micro- and Nanotechnology, Technical University of Denmark3
Nanointegration Group, NanoSystemsEngineering Section, Department of Micro- and Nanotechnology, Technical University of Denmark4
NanoSystemsEngineering Section, Department of Micro- and Nanotechnology, Technical University of Denmark5
Networks of single-walled carbon nanotubes were assembled onto microelectrodes by dielectrophoresis. The dependence of the obtained networks on several assembly parameters such as bias voltage, field application time, frequency, electrode geometry and the nanotube solvent were investigated both structurally and electrically.
Reproducible differences in morphological and electrical properties were observed for the parameters investigated. Application of a bias voltage above 10 V for more than 30 seconds with nanotubes in an SDS solution, resulted in dense networks with a relatively low resistance in the 10 k Omega regime.
On the other hand, individual nanotubes and bundles were assembled with lower voltages applied for less than 10 seconds and with other nanotubes solutions. The experimental results were combined with theoretical calculations in order to find a geometry and voltage independent threshold field for the successful assembly of nanotubes between electrodes using dielectrophoresis.
Language: | English |
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Year: | 2008 |
Pages: | 1973-1978 |
ISSN: | 15334899 and 15334880 |
Types: | Journal article |
DOI: | 10.1166/jnn.2008.047 |
ORCIDs: | Dimaki, Maria and Bøggild, Peter |