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Related Experiment Video

Updated: Jun 29, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

Nondestructive Single-Atom-Thick Crystallographic Scanner via Sticky-Note-Like van der Waals

Ji-Yun Moon^1,2, Seung-Il Kim^1,2, Soheil Ghods²

¹Department of Mechanical Engineering and Materials Science and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA.

Advanced Materials (Deerfield Beach, Fla.)

|April 4, 2024

Summary

A new nondestructive method uses van der Waals forces to analyze the crystallographic details of two-dimensional materials (2DMs). This technique allows for large-area analysis without damaging the 2DMs, enabling their subsequent use.

Keywords:

atomic spalling crystallographic graphene nondestructive vdW heterostructure

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Last Updated: Jun 29, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

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Published on: July 5, 2019

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

$On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature$

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature

Published on: March 11, 2022

Area of Science:

Materials Science
Nanotechnology
Solid State Physics

Background:

Crystallographic characteristics are vital for two-dimensional materials (2DMs) properties.
Current analysis methods are destructive and complex, limiting 2DM usability.
A need exists for nondestructive, large-area crystallographic analysis of 2DMs.

Purpose of the Study:

To develop a nondestructive, large-area method for analyzing the crystallography of 2DMs.
To enable the characterization and subsequent use of 2DM samples.
To advance the understanding and application of single-atom-thick materials.

Main Methods:

Utilized van der Waals (vdW) assembling and disassembling.
Employed a single-atom-thick single-crystalline graphene filter (SCG-filter) for polycrystalline graphene (PCG) analysis.
Performed 2D Raman signal scans based on interlayer twist angle for crystallographic visualization.

Main Results:

Successfully visualized detailed crystallographic information of individual grains in PCGs.
Achieved seamless separation of PCGs from the SCG-filter, preserving sample integrity.
Demonstrated reusability of the SCG-filter for multiple analyses.

Conclusions:

The presented vdW assembling-disassembling method offers a nondestructive approach to 2DMs crystallography.
This technique facilitates large-area analysis and preserves the integrity of 2DM samples.
The method has significant implications for advancing 2DM research and applications.