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Graphene confers ultralow friction on nanogear cogs

journal contribution
posted on 2023-06-10, 01:30 authored by Andrea Mescola, Guido Paolicelli, Sean OgilvieSean Ogilvie, Roberto Guarino, James G McHugh, Alberto Rota, Erica Iacob, Enrico Gnecco, Sergio Valeri, Nicola M Pugno, Venkataramana Gadhamshetty, Maksud M Rahman, Pulickel Ajayan, Alan DaltonAlan Dalton, Manoj TripathiManoj Tripathi
Friction-induced energy dissipation impedes the performance of nanomechanical devices. Nevertheless, the application of graphene is known to modulate frictional dissipation by inducing local strain. This work reports on the nanomechanics of graphene conformed on different textured silicon surfaces that mimic the cogs of a nanoscale gear. The variation in the pitch lengths regulates the strain induced in capped graphene revealed by scanning probe techniques, Raman spectroscopy, and molecular dynamics simulation. The atomistic visualization elucidates asymmetric straining of C?C bonds over the corrugated architecture resulting in distinct friction dissipation with respect to the groove axis. Experimental results are reported for strain-dependent solid lubrication which can be regulated by the corrugation and leads to ultralow frictional forces. The results are applicable for graphene covered corrugated structures with movable components such as nanoelectromechanical systems, nanoscale gears, and robotics.

History

Publication status

  • Published

File Version

  • Published version

Journal

Small

ISSN

1613-6810

Publisher

Wiley

Issue

47

Volume

17

Article number

a2104487

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2021-10-25

First Compliant Deposit (FCD) Date

2021-10-23

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