Understanding the friction of atomically thin layered materials
- Datum: 03.11.2020
- Uhrzeit: 11:00 - 12:00
- Vortragende(r): Prof. Astrid de Wijn
- https://www.ntnu.edu/employees/astrid.dewijn
- Ort: Digital see link
- Gastgeber: Robinson Cortes Huerto
- Kontakt: corteshu@mpip-mainz.mpg.de
Friction is a ubiquitous phenomenon that greatly affects our everyday
lives and
is responsible for large amounts of energy loss in industrialised
societies.
Layered materials such as graphene have interesting frictional
properties and
are often used as (additives to) lubricants to reduce friction and
protect
against wear. Experimental Atomic Force Microscopy studies and detailed
simulations have shown a number of intriguing effects such as friction
strengthening and dependence of friction on the number of layers
covering a
surface. Here, we propose a simple, fundamental, model for friction on
thin
sheets. We use our model to explain a variety of seemingly contradictory
experimental as well as numerical results. This model can serve as a
basis for
understanding friction on thin sheets, and opens up new possibilities
for
ultimately controlling their friction and wear protection.