We identify a new material phenomenon, where minute mechanical manipulations induce pronounced global structural reconfigurations in faceted multi-walled nanotubes. This behavior has strong implications on the tribological properties of these systems and may be the key to understand the enhanced inter-wall 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.

The Smallest Archimedean Screw : Facet Dynamics and Friction in Multi-Walled Nanotubes / R. Guerra, I. Leven, A. Vanossi, O. Hod, E. Tosatti. - In: NANO LETTERS. - ISSN 1530-6984. - 17:9(2017 Sep 13), pp. 5321-5328.

The Smallest Archimedean Screw : Facet Dynamics and Friction in Multi-Walled Nanotubes

R. Guerra
Primo
;
2017

Abstract

We identify a new material phenomenon, where minute mechanical manipulations induce pronounced global structural reconfigurations in faceted multi-walled nanotubes. This behavior has strong implications on the tribological properties of these systems and may be the key to understand the enhanced inter-wall 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.
nanotube; friction; faceting
Settore FIS/03 - Fisica della Materia
Settore CHIM/02 - Chimica Fisica
13-set-2017
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/521829
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