3 years ago

Smallest Archimedean Screw: Facet Dynamics and Friction in Multiwalled Nanotubes

Smallest Archimedean Screw: Facet Dynamics and Friction in Multiwalled Nanotubes
Erio Tosatti, Itai Leven, Andrea Vanossi, Roberto Guerra, Oded Hod
We identify a new material phenomenon, where minute mechanical manipulations induce pronounced global structural reconfigurations in faceted multiwalled nanotubes. This behavior has strong implications on the tribological properties of these systems and may be the key to understand the enhanced interwall friction recently measured for boron-nitride nanotubes with respect to their carbon counterparts. Notably, the fast rotation of helical facets in these systems upon coaxial sliding may serve as a nanoscale Archimedean screw for directional transport of physisorbed molecules.

Publisher URL: http://dx.doi.org/10.1021/acs.nanolett.7b01718

DOI: 10.1021/acs.nanolett.7b01718

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