Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4729876
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- University of Science and Technology of China (USTC)
- Fundamental Research Funds for the Central Universities
- Chinese Academy of Sciences (CAS)
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Few-layer graphene (FLG) has been prepared by thermal annealing of SiC crystal via the surface Ni-silicidation reactions. Results reveal that the temperature plays an important role for the final FLG quality and the optimized annealing temperature is about 800 degrees C. The investigation of surface morphology and microstructure for the FLG sample indicates that after the rapid cooling, the carbon atoms will segregate to form the FLG layer and the NiSix particles will congregate on the top surface. The mechanism of the FLG formation on SiC surface assisted by the Ni ultra-thin layer is briefly discussed based on the experimental results. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4729876]
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