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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
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Bottom-up realization and electrical characterization of a graphene-based device.
A Maffucci1, F Micciulla, A Cataldo
1DIEI, University of Cassino and Southern Lazio, Via G. di Biasio 43, 03043, Cassino, Italy. INFN, National Institute of Nuclear Physics, via E. Fermi 40, 00044 Frascati, Italy.
Nanotechnology
|February 9, 2016
Summary
We developed a simple method to create graphene devices for gas sensing. This technique uses microwave-treated graphite to form a graphene carpet, showing reproducible and competitive performance for industrial use.
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Graphene offers unique electrical properties.
- Developing cost-effective fabrication methods for graphene devices is crucial.
- Existing methods for graphene device fabrication can be complex and expensive.
Purpose of the Study:
- To propose a novel, bottom-up fabrication procedure for graphene-based devices.
- To demonstrate the potential of these devices as gas sensors.
- To establish a reproducible and industrially viable manufacturing technique.
Main Methods:
- Fabrication of few-layer graphene nanoplatelets via microwave irradiation of intercalated graphite.
- Formation of a graphene carpet contact between copper electrodes using a DC electrical field.
- Measurement of device electrical resistance versus gap length and temperature.
- Evaluation of gas sensing capabilities by monitoring resistance changes in the presence of gas.
Main Results:
- Successful fabrication of a graphene-based microstrip-like circuit.
- Demonstrated gas sensing capabilities with measurable resistance sensitivity to gas presence.
- Achieved good reproducibility in the fabrication process.
- Exhibited competitive device performance.
Conclusions:
- The proposed bottom-up procedure offers an easy-to-engineer and cost-effective method for graphene device fabrication.
- The developed graphene devices show promise for gas sensing applications.
- The technique's reproducibility and performance make it attractive for industrial adoption.
