title: Modulated chemical doping of individual carbon nanotubes.
abstract: Modulation doping of a semiconducting single-walled carbon nanotube along its length leads to an intramolecular wire electronic device. The nanotube is doped n-type for half of its length and p-type for the other half. Electrostatic gating can tune the system into p-n junctions, causing it to exhibit rectifying characteristics or negative differential conductance. The system can also be tuned into n-type, exhibiting single-electron charging and negative differential conductance at low temperatures. The low-temperature behavior is manifested by a quantum dot formed by chemical inhomogeneity along the tube.
authors.affiliation: Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
authors.forename: C
authors.initials: C
authors.lastname: Zhou
authors.forename: J
authors.initials: J
authors.lastname: Kong
authors.forename: E
authors.initials: E
authors.lastname: Yenilmez
authors.forename: H
authors.initials: H
authors.lastname: Dai