Enhancing conductivity of metallic carbon nanotube networks by transition metal adsorption
- COMP, Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto (Finland)
The conductivity of carbon nanotube thin films is mainly determined by carbon nanotube junctions, the resistance of which can be reduced by several different methods. We investigate electronic transport through carbon nanotube junctions in a four-terminal configuration, where two metallic single-wall carbon nanotubes are linked by a group 6 transition metal atom. The transport calculations are based on the Green’s function method combined with the density-functional theory. The transition metal atom is found to enhance the transport through the junction near the Fermi level. However, the size of the nanotube affects the improvement in the conductivity. The enhancement is related to the hybridization of chromium and carbon atom orbitals, which is clearly reflected in the character of eigenstates near the Fermi level. The effects of chromium atoms and precursor molecules remaining adsorbed on the nanotubes outside the junctions are also examined.
- OSTI ID:
- 22416084
- Journal Information:
- Journal of Chemical Physics, Vol. 142, Issue 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
Covalent Metal-Nanotube Heterojunctions as Ultimate Nano-Contacts
Effect of top metal contact on the electrical properties of suspended spiral multiwalled carbon nanotube