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- Title
TEMPERATURE DEPENDENCE OF ELECTRICAL RESISTANCE OF INDIVIDUAL CARBON NANOTUBES AND CARBON NANOTUBES NETWORK.
- Authors
Dehghani, Sajjad; Moravvej-Farshi, Mohammad Kazem; Sheikhi, Mohammad Hossein
- Abstract
We present a model to understand the effect of temperature on the electrical resistance of individual semiconducting single wall carbon nanotubes (s-SWCNTs) of various di-ameters under various electric fields. The temperature dependence of the resistance of s-SWCNTs and metallic SWCNTs (m-SWCNTs) are compared. These results help us to understand the temperature dependence of the resistance of SWCNTs network. We experimentally examine the temperature dependence of the resistance of random networks of SWCNTs, prepared by dispersing CNTs in ethanol and drop-casting the solution on prefabricated metallic electrodes. Examining various samples with different electrode materials and spacings, we find that the dominant resistance in determination of the temperature dependence of resistance of the network is the resistance of individual tubes, rather than the tube-tube resistance or tube-metal contact resistance. It is also found that the tube-tube resistance depends on the electrode spacing and it is more important for larger electrode spacings. By applying high electric field to burn the all-metallic paths of the SWCNTs network, the temperature dependence of the resistance of s-SWCNTs is also examined. We also investigate the effect of acid treatment of CNTs on the temperature dependence of the resistance of SWCNTs and also multi-wall CNTs (MWCNTs) networks.
- Subjects
ELECTRIC resistance; TEMPERATURE effect; CARBON nanotubes; MATHEMATICAL models; SEMICONDUCTORS; ELECTRIC fields; MICROFABRICATION
- Publication
Modern Physics Letters B, 2012, Vol 26, Issue 21, p1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984912501369