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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Graphene synthesis by ion implantation.
Applied Physics Letters
|December 3, 2010
Summary
We developed a new method for synthesizing high-quality graphene films using ion implantation and annealing. This technique allows for controllable film thickness and is adaptable to various substrates and temperatures.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Science
Background:
- Graphene synthesis is crucial for advanced electronics.
- Existing methods often involve complex chemical processes or limited substrate compatibility.
Purpose of the Study:
- To demonstrate a novel, scalable method for graphene synthesis.
- To achieve controllable graphene film thickness.
- To develop a versatile graphene fabrication technique.
Main Methods:
- Ion implantation of carbon atoms into metallic substrates.
- Thermal annealing of ion-implanted substrates to induce graphene surface growth.
- Characterization using Raman spectroscopy and electrical measurements.
Main Results:
- Successful large-scale synthesis of high-quality graphene films.
- Graphene thickness directly controlled by ion implantation dose.
- Film quality comparable to existing synthesis methods.
- Method demonstrated on polycrystalline nickel substrates.
Conclusions:
- Ion implantation offers a scalable and controllable route for graphene synthesis.
- The method is versatile, applicable to various substrates and temperatures.
- This technique avoids the need for chemical precursors or substrate carbon solvation.
