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Related Experiment Video

Updated: Jul 21, 2025

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

Precise graphene cutting using a catalyst at a probe tip under an electron beam.

Alexander S Sinitsa^1,2, Yulia G Polynskaya², Irina V Lebedeva³

¹National Research Centre "Kurchatov Institute", Kurchatov Square 1, Moscow 123182, Russia. alexsinitsa91@gmail.com.

Physical Chemistry Chemical Physics : PCCP

|July 25, 2023

Summary

Precise graphene cutting is achieved using a nickel catalyst and electron beam. This method enables controlled nanoscale cuts with straight edges, offering a new way to manipulate 2D materials.

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Last Updated: Jul 21, 2025

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Published on: September 21, 2020

Area of Science:

Materials Science
Nanotechnology
Computational Chemistry

Background:

Precise manipulation of 2D materials like graphene is essential for advanced applications.
Existing methods for cutting graphene often lack precision or scalability.

Purpose of the Study:

To propose and investigate a novel method for precise cutting of 2D materials.
To elucidate the atomistic mechanisms underlying the cutting process using simulations.

Main Methods:

Atomistic simulations, including reactive molecular dynamics (Compu-TEM approach).
Investigated graphene cutting using a nickel catalyst and electron beam.
Performed ab initio calculations to analyze atomic binding energies.

Main Results:

The combined action of a nickel catalyst and electron irradiation is crucial for effective graphene cutting.
Achieved straight-edged cuts with widths of 1-1.5 nm.
Identified key atom ejection mechanisms driving cut propagation and edge smoothing.

Conclusions:

The proposed method offers precise control over graphene cutting at the nanoscale.
The catalytic effect of nickel and electron irradiation significantly lowers the energy barrier for atom ejection, enabling controlled cutting.
The atomistic mechanism differs from that observed in carbon nanotube cutting.