title: Isotope effect on the thermal conductivity of boron nitride nanotubes.
abstract: We have measured the temperature-dependent thermal conductivity kappa(T) of individual multiwall boron nitride nanotubes using a microfabricated test fixture that allows direct transmission electron microscopy characterization of the tube being measured. kappa(T) is exceptionally sensitive to isotopic substitution, with a 50% enhancement in kappa(T) resulting for boron nitride nanotubes with 99.5% 11B. For isotopically pure boron nitride nanotubes, kappa rivals that of carbon nanotubes of similar diameter.
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: C W
authors.initials: CW
authors.lastname: Chang
authors.forename: A M
authors.initials: AM
authors.lastname: Fennimore
authors.forename: A
authors.initials: A
authors.lastname: Afanasiev
authors.forename: D
authors.initials: D
authors.lastname: Okawa
authors.forename: T
authors.initials: T
authors.lastname: Ikuno
authors.forename: H
authors.initials: H
authors.lastname: Garcia
authors.forename: Deyu
authors.initials: D
authors.lastname: Li
authors.forename: A
authors.initials: A
authors.lastname: Majumdar
authors.forename: A
authors.initials: A
authors.lastname: Zettl