1. Thermal stability studies of CVD-grown graphene nanoribbons: Defect annealing and loop formation
- Author
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Campos-Delgado, J., Kim, Y.A., Hayashi, T., Morelos-Gómez, A., Hofmann, M., Muramatsu, H., Endo, M., Terrones, H., Shull, R.D., Dresselhaus, M.S., and Terrones, M.
- Subjects
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NANOSTRUCTURED materials , *HEAT treatment , *CHEMICAL vapor deposition , *HIGH temperature chemistry , *THERMAL properties , *X-ray diffraction , *CARBON - Abstract
Abstract: We present a high temperature heat treatment study of CVD-grown graphene nanoribbons annealed up to 2800°C, demonstrating a progressive annihilation of lattice defects as the heat treatment temperature is raised. Starting at 1500°C, single and multiple loop formation were observed on the ribbons edges as the temperature was increased. The structural changes of the samples are documented by X-ray diffraction, Raman spectroscopy, TGA, SEM, and HRTEM. This work indicates that nanoribbon annealing eventually leads to defect-free samples, through graphitization and edge loop formation. The annealed material exhibits structural differences that could be tailored for a variety of specific applications. [Copyright &y& Elsevier]
- Published
- 2009
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