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1 article(s) from Vacher, Robin

Nanoscale friction and wear of a polymer coated with graphene

Robin Vacher and
Astrid S. de Wijn

Beilstein J. Nanotechnol. 2022, 13, 63–73, doi:10.3762/bjnano.13.4

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Figure 1: Coarse grained model for polyvinyl alcohol (PVA, C₂H₄O)_x). Red atoms are oxygen, dark gray are carb...

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Figure 2: Snapshot of the simulation after the deposition of graphene on the polymer and before indentation a...

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Figure 3: (a) Top view and (b) side view of the simulation. The positions of the fixed graphene carbon atoms ...

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Figure 4: Density of the substrate through the full length of the simulation box (polymer only), (a) before d...

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Figure 5: The penetration depth versus time for long indentations, and for the sliding process, for a tip wit...

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Figure 6: Indentation depth as a function of the normal load for the flat graphene specimen with tip radii r ...

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Figure 7: Indentation depth on flat graphene and crumpled graphene layers for different normal loads and a ti...

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Figure 8: Density maps of the polymer for (a) the flat graphene sheet with r = 50 Å and F_n = 3.2 nN, (b) the ...

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Figure 9: Snapshots of the simulation during sliding for a tip radius of 50 Å and a load of 102 nN (64 eV/Å) ...

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Figure 10: Frictional force as a function of the position of the support on the flat graphene specimen for (a)...

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Figure 11: Average frictional force measured between support displacements of 50 and 100 Å as function of the ...

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Figure 12: Frictional force versus the position of the support for a tip of radius r = 50 Å on the crumpled gr...

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Figure 13: Average frictional force measured between 50 and 100 Å of the support displacement versus load appl...

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Figure 14: Average displacement of the monomers below the tip during sliding for (a) the case without graphene...

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Full Research Paper

Published 14 Jan 2022

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