About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Functional and Structural Thin Films and Coatings
|
| Presentation Title |
Nanomanipulation and Nanolithography Experiments on Mono- and Multilayer MoS2 Surfaces |
| Author(s) |
Enrico Gnecco, Alper Özogul, Felix Cassin, Roberto Guerra, Andrey Turchanin, Franciszek Krok |
| On-Site Speaker (Planned) |
Enrico Gnecco |
| Abstract Scope |
We report the results of rather unconventional nanotribological investigations on MoS2. In a first series of measurements we have manipulated Au islands along different directions of MoS2 single crystal surfaces and mono- and bi-layers on SiO2. The zigzag orientation turns out as a preferential direction of motion, in full agreement with molecular dynamics investigations of the manipulation process. As a result, the Au islands tend to form long nanostripes, whose compaction is prevented by the substrate roughness and/or charging effects. In the second part of the talk we will discuss the exfoliation of MoS2 layers obtained by scraping the aforementioned surfaces with a diamond nanotip. Interesting directionality effects are also seen in this case. Some hints on the energetics of the exfoliation process are obtained from a comparison of the friction force signals recorded while scraping and the morphology of the exfoliated structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Thin Films and Interfaces, Mechanical Properties |