Friction of magnetene, a non-van der Waals 2D material
| Autor: | Tobin Filleter, Guorui Wang, Chandra Veer Singh, Peter Serles, Thakur Prasad Yadav, Taib Arif, Aravind Puthirath Balan, Gelu Costin, Shwetank Yadav, Nithya Chakingal, Anand B. Puthirath, Pulickel M. Ajayan, Teng Cui, Prasankumar Thibeorchews |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Science Advances |
| ISSN: | 2375-2548 |
| Popis: | Description The friction of magnetene is found to be low despite its covalent bonding, which is correlated to its 2D confinement effects. Two-dimensional (2D) materials are known to have low-friction interfaces by reducing the energy dissipated by sliding contacts. While this is often attributed to van der Waals (vdW) bonding of 2D materials, nanoscale and quantum confinement effects can also act to modify the atomic interactions of a 2D material, producing unique interfacial properties. Here, we demonstrate the low-friction behavior of magnetene, a non-vdW 2D material obtained via the exfoliation of magnetite, showing statistically similar friction to benchmark vdW 2D materials. We find that this low friction is due to 2D confinement effects of minimized potential energy surface corrugation, lowered valence states reducing surface adsorbates, and forbidden low-damping phonon modes, all of which contribute to producing a low-friction 2D material. |
| Databáze: | OpenAIRE |
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