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High-Throughput Formation of 3D van der Waals Auto-Kirigami
Luc N Capaldi1, Li Yuan1, Cangyu Qu1
1Mechanical Engineering and Applied Mechanics, University of Pennsylvania, 220 S. 33rd St., Philadelphia, Pennsylvania 19104, United States.
Nano Letters
|February 28, 2025
Summary
Researchers developed 3D auto-kirigami from 2D van der Waals materials like graphite. This method creates self-folded structures, revealing enhanced electrical properties on fractured surfaces for novel 3D applications.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Physics
Background:
- Two-dimensional (2D) van der Waals materials possess superior in-plane properties.
- Translating these 2D properties into three-dimensional (3D) applications presents significant challenges.
Purpose of the Study:
- To introduce a novel high-throughput method for creating 3D structures from 2D materials.
- To investigate the spontaneous formation of 3D auto-kirigami via material indentation.
- To explore the potential of these 3D structures for accessing and enhancing material properties.
Main Methods:
- Indentation of thin flakes (<100 nm) of graphite and hexagonal boron nitride.
- Utilizing a high-throughput approach for spontaneous 3D auto-kirigami formation.
- Analyzing leaflet geometry and correlating it with buckling load.
Main Results:
- Demonstrated spontaneous formation of 3D auto-kirigami structures through self-fracture and self-folding.
- Observed enhanced electrical conductance along the out-of-plane fractured edges of the 3D structures.
- Developed a real-time predictor for leaflet morphology based on buckling load and leaflet length.
Conclusions:
- 3D auto-kirigami offer a deformation-driven platform for fabricating 3D van der Waals structures.
- This method provides direct access to in-plane properties through out-of-plane surfaces.
- The findings enable leveraging the unique properties of 2D materials in three dimensions.
