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Lubricants, Volume 7, Issue 10 (October 2019)
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Cover Story (view full-size image) Polymer brushes, assemblies of macromolecules end-grafted to a surface, show outstanding [...] Read more. Polymer brushes, assemblies of macromolecules end-grafted to a surface, show outstanding lubrication properties, resulting from their ability to retain a lubricious solvent layer and change conformation in response to shear. To investigate the effects of geometry on these mechanisms, we simulated shear between polymer brushes on cylindrical surfaces. Surprisingly, shear thinning effects were found to be independent of the system size, despite significant changes of the particle density distribution at smaller cylinder radii. These results may aid further research into polymer brush lubrication, as well as our understanding of analogous biological systems such as the nuclear pore complex. View this paper.