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Toward high throughput interconvertible graphane-to-graphene growth and patterning.

Yu Wang¹, Xiangfan Xu, Jiong Lu

¹Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.

|September 18, 2010

Summary

Researchers developed a novel method to create high-quality monolayer graphene from graphane-like films using plasma-enhanced chemical vapor deposition. This technique offers a faster, lower-temperature alternative for graphene production.

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Area of Science:

Materials Science
Nanotechnology
Surface Science

Background:

Graphene synthesis typically requires high temperatures (around 1000 °C) using thermal chemical vapor deposition.
Producing large-area, high-quality monolayer graphene remains a challenge for scalable applications.

Purpose of the Study:

To report a new, efficient route for synthesizing high-quality monolayer graphene.
To investigate the conversion of graphane-like films to graphene at lower temperatures.

Main Methods:

Large-area graphane-like films were produced using remote-discharged radio frequency plasma beam deposition at 650 °C.
Characterization involved near edge X-ray adsorption, Raman spectroscopy, transmission electron microscopy, and scanning tunneling microscopy.
The graphane-to-graphene transition was studied by analyzing dehydrogenation processes.

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Main Results:

Monolayer graphene was successfully synthesized via dehydrogenation of graphane-like films at 650 °C in under 5 minutes.
Characterization confirmed the formation of high-quality monolayer graphene with distinct properties.
The quantum Hall effect was observed, indicating the high quality of the synthesized graphene.

Conclusions:

The plasma-enhanced chemical vapor deposition route offers a significantly faster and lower-temperature method for graphene synthesis.
The interconversion between graphane-like films and graphene enables potential for fabricating regions with tunable conductivity.
This approach paves the way for maskless, laser-written fabrication of graphene-based devices.