__smbhome.uscs.susx.ac.uk_akj23_Desktop_mon1.pdf (1.72 MB)
Friction and adhesion of different structural defects of graphene
journal contribution
posted on 2023-06-09, 16:00 authored by Manoj TripathiManoj Tripathi, Firas Awaja, Rafael A. Bizão, Stefano Signetti, Erica Iacob, Guido Paolicelli, Sergio Valeri, Alan DaltonAlan Dalton, Nicola Maria PugnoGraphene structural defects, namely edges, step-edges and wrinkles are susceptible to severe mechanical deformation and stresses under frictional operations. Applied forces cause deformation by folding, buckling, bending and tearing the defective sites of graphene, which lead to a remarkable decline in normal load and friction bearing capacity. In this work, we experimentally quantified the maximal normal and friction forces corresponding to the damage thresholds of the different investigated defects as well as their pull-out (adhesion) forces. Horizontal wrinkles (with respect to the basal plane, i.e. folded) sustained the highest normal load, up to 317 nN, during sliding, whereas for vertical (i.e. standing collapsed) wrinkles, step-edges and edges, the load bearing capacities are up to 113 nN, 74 nN and 63±5 nN, respectively. The related deformation mechanisms were also experimentally investigated by varying the normal load up to the initiation of the damage from the investigated defects and extended with the numerical results from Molecular Dynamics and Finite Element Method simulations.
History
Publication status
- Published
File Version
- Accepted version
Journal
ACS Applied Materials and InterfacesISSN
1944-8244Publisher
American Chemical SocietyExternal DOI
Issue
51Volume
10Page range
44614-44623Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Materials Physics Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2018-11-27First Open Access (FOA) Date
2019-11-15First Compliant Deposit (FCD) Date
2018-11-26Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC