Catalyst and substrate-free synthesis of graphene nanosheets by unzipping C-60 fullerene clusters using a pulse current method

SS Kim and HW Kim and A Mirzaei and W Oum and H Ham and YJ Kwon and S Mosleh-Shirazi and KY Shin and DJ Yu and SW Kang and EB Kim, MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 149, 106831 (2022).

DOI: 10.1016/j.mssp.2022.106831

Transformation of carbon nanomaterials to different allotropes is a very promising approach for preparing a variety of carbon nanomaterials. Herein, we present the catalyst and substrate-free synthesis of graphene (G) nanosheets from fullerene (C60) clusters. G nanosheets were formed from an unzipping process of fullerene clusters using a direct pulse current via a pulsed current sintering method, in which carbon atoms were evaporated from fullerenes as a result of generation of locally high temperatures. Fullerene clusters and G nanosheets were analyzed by different characterization tools and it was demonstrated that G can be successfully synthesized using transformation of fullerenes as starting materials without the need for catalyst or substrate.

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