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Updated: Jun 21, 2026

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

Structural transformations in graphene studied with high spatial and temporal resolution.

Jamie H Warner¹, Mark H Rümmeli, Ling Ge

¹Department of Materials, Quantum Information Processing Interdisciplinary Research Collaboration, University of Oxford, Oxford, UK. jamie.warner@materials.ox.ac.uk

Nature Nanotechnology

|August 8, 2009

Summary

This summary is machine-generated.

Electron beam irradiation precisely removes graphene layers, enabling real-time atomic-level observation of structural changes. This technique reveals unique transformations in few-layer graphene, including layer displacement and edge distortions.

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Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Graphene exhibits exceptional electronic properties and finds applications in microscopy and electronics.
There is a need for methods to precisely manipulate graphene's properties and monitor these changes in situ.
Understanding electron-matter interactions in 2D materials is crucial for advanced applications.

Purpose of the Study:

To demonstrate electron-beam-induced sputtering for selective monolayer removal in few-layer graphene.
To investigate the atomic-level structural reconstruction during this process using advanced microscopy.
To explore other electron-beam-induced phenomena like monolayer displacement and edge dynamics.

Main Methods:

Irradiation of few-layer graphene with an 80 kV electron beam.
In situ observation using aberration-corrected, low-voltage, high-resolution transmission electron microscopy (HRTEM) with sub-ångström resolution.
Real-time monitoring of structural changes with temporal resolution down to 80 ms.

Main Results:

Selective removal of graphene monolayers via electron-beam-induced sputtering.
Observation of preferential layer termination along the zigzag orientation for larger holes.
Real-time visualization of carbon atom reconstruction during sputtering.
Demonstration of rapid monolayer displacement, elastic distortions, and flexible bending at graphene edges.

Conclusions:

Electron beam irradiation offers a precise method for manipulating few-layer graphene structure at the atomic scale.
The study provides insights into the fundamental mechanisms of energy transfer and structural transformation in graphene.
These findings pave the way for controlled modification of graphene for novel electronic and material applications.