title: Quantum conductance steps in solutions of multiwalled carbon nanotubes.
abstract: 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 the solution on gold substrates. Conductance steps were clearly seen. A histogram of a high number of traces shows maximum peaks at integer values of the conductance quantum G(0)=2e(2)/h, demonstrating ballistic transport at room temperature along the carbon nanotube over distances longer than 1.4 microm.
authors.affiliation: Departamento de Electrónica, Tecnología de Computadoras y Proyectos, Universidad Politécnica de Cartagena, C/Doctor Fleming s/n, 30202 Cartagena, Murcia, Spain. aurbina@upct.es
authors.forename: A
authors.initials: A
authors.lastname: Urbina
authors.forename: I
authors.initials: I
authors.lastname: Echeverría
authors.forename: A
authors.initials: A
authors.lastname: Pérez-Garrido
authors.forename: A
authors.initials: A
authors.lastname: Díaz-Sánchez
authors.forename: J
authors.initials: J
authors.lastname: Abellán