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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
Published on: July 5, 2019
Scaling laws for van der Waals interactions in nanostructured materials
Vivekanand V Gobre1, Alexandre Tkatchenko
1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
Nature Communications
|August 20, 2013
Summary
Van der Waals interactions in nanomaterials extend further than expected and vary with system size and dimensionality. These unique interactions in nanostructures could be harnessed to control self-assembly processes.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Van der Waals interactions are crucial for self-assembly and function in nanostructured materials.
- Understanding these interactions at the nanoscale is key to designing novel materials.
Purpose of the Study:
- To investigate the behavior and scaling laws of van der Waals interactions in various nanomaterials.
- To explore how dimensionality and size affect these interactions.
- To propose novel applications for controlling self-assembly via van der Waals forces.
Main Methods:
- Utilized an efficient microscopic method for calculating van der Waals interactions.
- Studied systems including graphene (single-layer and multilayer), fullerenes, carbon nanotubes, and graphene nanoribbons.
- Analyzed interaction behavior as a function of nanostructure size and dimensionality.
Main Results:
- Demonstrated that van der Waals interactions in nanomaterials operate at greater distances than typically assumed.
- Observed that interaction scaling laws differ based on system dimensionality and size.
- Found unusual trends in van der Waals coefficients with nanostructure size, deviating from pairwise-additive models.
Conclusions:
- Van der Waals interactions in nanostructured materials exhibit unique size- and dimensionality-dependent characteristics.
- The observed deviations from conventional models highlight the complexity of these forces at the nanoscale.
- These peculiar van der Waals interactions offer potential for precise control over material self-assembly.
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