SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 26: Poster Session II: Nanostructures at surfaces II
O 26.7: Poster
Montag, 1. März 2021, 13:30–15:30, P
A differential equation for plowing-induced structuring of polymer films — •Enrico Gnecco1, Jana Hennig1, Pedro J. Martinez2, and Juan J. Mazo2 — 1Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Germany — 2Department of Condensed Matter Physics, University of Zaragoza, Spain
The formation of ripple structures out of plowing wear is a well-known but scarcely understood phenomenon in polymer physics. Here we discuss this process on the example of polystyrene thin film scratched by silicon nanotips. The physical interpretation relies on the stick-slip motion of the tip, which is simultaneously indented and elastically pulled along the surface. The dependence of the ripple orientation on the geometry of the scanned area is numerically reproduced with an original equation for the tip motion in an energy landscape mirroring the surface evolution. Eye-catching examples will include square, circle, star and heart shaped geometries, but potential applications of our model will be also mentioned.
[1] J.J. Mazo et al., Plowing-induced structuring of compliant surfaces, PRL 122 (2019) 256101 [2] P.J. Martinez et al., Numerical study of pattern formation in compliant surfaces scraped by a rigid tip, PRE, accepted (2021)