title: Ultrahigh interlayer friction in multiwalled boron nitride nanotubes.
abstract: Friction at the nanoscale has revealed a wealth of behaviours that depart strongly from the long-standing macroscopic laws of Amontons-Coulomb. Here, by using a 'Christmas cracker'-type of system in which a multiwalled nanotube is torn apart between a quartz-tuning-fork-based atomic force microscope (TF-AFM) and a nanomanipulator, we compare the mechanical response of multiwalled carbon nanotubes (CNTs) and multiwalled boron nitride nanotubes (BNNTs) during the fracture and telescopic sliding of the layers. We found that the interlayer friction for insulating BNNTs results in ultrahigh viscous-like dissipation that is proportional to the contact area, whereas for the semimetallic CNTs the sliding friction vanishes within experimental uncertainty. We ascribe this difference to the ionic character of the BN, which allows charge localization. The interlayer viscous friction of BNNTs suggests that BNNT membranes could serve as extremely efficient shock-absorbing surfaces.
authors.affiliation: Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, 69622 Villeurbanne cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Niguès
authors.affiliation: Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, 69622 Villeurbanne cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Siria
authors.affiliation: Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, 69622 Villeurbanne cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Vincent
authors.affiliation: Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, 69622 Villeurbanne cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Poncharal
authors.affiliation: 1] Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, 69622 Villeurbanne cedex, France [2] Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, UMI 3466 CNRS-MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: L
authors.initials: L
authors.lastname: Bocquet