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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Surface property change of graphene using nitrogen ion
Ki-Jeong Kim1, Hangil Lee, Junghun Choi
1Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang, Kyongbuk, Republic of Korea.
Summary
Nitrogen ion implantation modifies graphene surfaces, creating distinct nitrogen species. This study investigates the resulting property changes using advanced spectroscopy and microscopy techniques.
Area of Science:
- Materials Science
- Surface Science
- Nanotechnology
Background:
- Graphene's unique properties make it a promising material for various applications.
- Surface modification is crucial for tailoring graphene's functionality.
- Understanding nitrogen incorporation is key to developing novel graphene-based materials.
Purpose of the Study:
- To investigate the effects of nitrogen ion irradiation on graphene.
- To characterize the induced nitrogen species and their impact on graphene's surface properties.
Main Methods:
- Graphene layers grown on 6H-SiC(0001) were irradiated with 100 eV nitrogen ions.
- Surface analysis was performed using Photoemission Spectroscopy (PES).
- Near Edge X-ray Adsorption Spectroscopy (NEXAFS) and Atomic Force Microscopy (AFM) were employed for detailed characterization.
Main Results:
- Nitrogen ion implantation successfully modified the graphene surface.
- Three distinct nitrogen species were identified: nitrogen gas, graphite-like nitrogen, and pyridine-like nitrogen.
- PES, NEXAFS, and AFM provided insights into the structural and chemical changes.
Conclusions:
- Nitrogen ion irradiation is an effective method for functionalizing graphene surfaces.
- The presence of multiple nitrogen species suggests diverse bonding configurations.
- This research contributes to the development of nitrogen-doped graphene for advanced applications.
