Quantum conductance steps in solutions of multiwalled carbon nanotubes
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AuthorUrbina Yeregui, Antonio; Echevarría, I.; Pérez Garrido, Antonio; Díaz Sánchez, Anastasio; Abellán García, Francisco Javier
Knowledge AreaFísica Aplicada
SponsorsWe wish to acknowledge Professor John Schrag for supplying Aroclor 1254, and for helpful discussions and suggestions. This work has been partially supported by Fundación Séneca under Grant No.PI-60-00858-FS-01.
PublisherAmerican Physical Society
Bibliographic CitationURBINA, A., ECHEVARRÍA, I., PÉREZ GARRIDO, A., DÍAZ SÁNCHEZ, A., ABELLÁN, J.Quantum conductance steps in solutions of multiwalled carbon nanotubes. Physical Review Letters, 90 (10): 106603-1 - 106603-4, 2003. ISSN 1079-7114
KeywordsNanotubos de carbón
Sustrato de oro
We have prepared solutions of multiwalled carbon nanotubes in Aroclor 1254, a mixture of polychlorinated biphenyls. The solutions are stable at room temperature. Transport measurements were performed using a scanning–tunneling probe on a sample prepared by spin–coating of the solution on gold substrates. Conductance steps were clearly seen. An histogram of a high number of traces shows maximum peaks at integer values of the conductance quantum G0 = 2e2/h, demonstrating ballistic transport at room temperature along the carbon nanotube over distances longer than 1.4μm.
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