Structural and chemical mechanisms governing stability of inorganic Janus nanotubes
| Autor: | Tejs Vegge, August Edwards Guldberg Mikkelsen, Kristian Sommer Thygesen, Felix T. Bölle, Ivano E. Castelli |
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| Rok vydání: | 2020 |
| Předmět: |
Steric effects
Work (thermodynamics) Nanotube Materials science FOS: Physical sciences 02 engineering and technology 010402 general chemistry 01 natural sciences QA76.75-76.765 Condensed Matter::Materials Science Monolayer General Materials Science Computer software Janus Materials of engineering and construction. Mechanics of materials Condensed Matter - Materials Science Materials Science (cond-mat.mtrl-sci) Radius 021001 nanoscience & nanotechnology 3. Good health 0104 chemical sciences Computer Science Applications Chemical bond Mechanics of Materials Chemical physics Modeling and Simulation TA401-492 Density functional theory 0210 nano-technology |
| Zdroj: | Bölle, F T, Mikkelsen, A E G, Thygesen, K S, Vegge, T & Castelli, I E 2021, ' Structural and chemical mechanisms governing stability of inorganic Janus nanotubes ', npj Computational Materials, vol. 7, no. 1, 41 . https://doi.org/10.1038/s41524-021-00505-9 npj Computational Materials, Vol 7, Iss 1, Pp 1-8 (2021) |
| DOI: | 10.48550/arxiv.2011.14708 |
| Popis: | One-dimensional inorganic nanotubes hold promise for technological applications due to their distinct physical/chemical properties, but so far advancements have been hampered by difficulties in producing single-wall nanotubes with a well-defined radius. In this work we investigate, based on Density Functional Theory (DFT), the formation mechanism of 135 different inorganic nanotubes formed by the intrinsic self-rolling driving force found in asymmetric 2D Janus sheets. We show that for isovalent Janus sheets, the lattice mismatch between inner and outer atomic layers is the driving force behind the nanotube formation, while in the non-isovalent case it is governed by the difference in chemical bond strength of the inner and outer layer leading to steric effects. From our pool of candidate structures we have identified more than 100 tubes with a preferred radius below 35 {\AA}, which we hypothesize can display unique properties compared to their parent 2D monolayers. Simple descriptors have been identified to accelerate the discovery of small-radius tubes and a Bayesian regression approach has been implemented to assess the uncertainty in our predictions on the radius. Comment: 26 pages, 8 figures |
| Databáze: | OpenAIRE |
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