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Updated: Nov 10, 2025
04:57
Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
Published on: July 18, 2025
643
Van der Waals interaction affects wrinkle formation in two-dimensional materials
Pablo Ares1,2, Yi Bo Wang3,2, Colin R Woods3,2
1Department of Physics and Astronomy, University of Manchester, M13 9PL Manchester, United Kingdom; pableras.ares@gmail.com bdavidov@umass.edu kostya@nus.edu.sg.
Summary
Radially oriented wrinkles in 2D vdW heterostructures reveal instabilities. Their pattern formation depends on membrane bending resistance and van der Waals attraction, offering insights into material properties.
Area of Science:
- Solid mechanics
- Materials science
- Condensed matter physics
Background:
- Nonlinear mechanics of solids involves complex patterns and applications.
- Two-dimensional (2D) crystals and van der Waals (vdW) heterostructures offer atomic-level control and interpretation.
- Understanding instabilities in these materials is crucial for advanced applications.
Purpose of the Study:
- To investigate the formation of radial wrinkles around bubbles in 2D vdW heterostructures.
- To explore the relationship between wrinkle patterns and material properties.
- To analyze the influence of interface structure and layer thickness on instabilities.
Main Methods:
- Utilizing the classical "Winkler foundation" model from elasticity theory.
- Analyzing the energetic balance between membrane bending resistance and vdW attraction.
- Correlating the number of radial wrinkles with bending rigidity and vdW interaction strength.
Main Results:
- Wrinkle shape and wavelength are influenced by 2D crystal thickness and interface atomistic structure.
- Periodic wrinkle patterns arise from a balance between bending resistance and vdW attraction.
- Bending rigidity shows a nontrivial, layer-dependent behavior, with two distinct regimes.
Conclusions:
- The number of radial wrinkles provides a quantitative link between bending rigidity and vdW interaction.
- The study demonstrates layer-dependent bending rigidity in 2D materials.
- vdW forces exhibit high sensitivity to the relative alignment of substrate and membrane.
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