Graphene nano-ribbons can be grown directly on the surface of a semiconductor, but it's hard to control the ribbons growth, and at the same time, aligning them all in the same direction.
Please check this article, entitled ''Graphene and graphite nanoribbons: Morphology, properties, synthesis, defects and applications'': Nano Today (2010) 5, 351—372
Thank you Dr Sujoy Sarkar for the informative information provided. I do appreciate your kind assistance and support.
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