info:eu-repo/semantics/conferenceProceedings
Electron Microscopy of Morphed Graphene Nanostructures Synthesized by Mechanical Milling
Autor
IVANOVICH ESTRADA GUEL
FRANCISCO ROBLES HERNANDEZ
Resumen
There are many carbon nanostructures (CN’s) and most likely graphene and diamond are still the most
interesting due to its physical properties. Synthesis of CN’s is made via diverse methods including vapor
deposition, exfoliation (graphene) or the use of high pressure and temperature (diamond). Thus it is
interesting to investigate a purely mechanical, simple and room temperature procedure to synthesize
CN’s. This investigation deals with the products of mechanically milling carbon soot at room
temperature that has rendered a different C allotrope herein identified as morphed graphene.
Identification of a new allotrope is quite complicated due to the wide variety of known carbon phases
and the pronounce effects of even subtle morphology changes as in the twisted layer graphene.
Nevertheless different forms of evidence have been shown that lead to conclude that the product of the
synthesis procedure in use (mechanical milling) indeed delivers a new allotrope [1]. Starting with
carbon soot, milling develops a variety of phases ranging from graphene (single, double-layered) to
diamond. Similar phases have been previously proposed from theoretical considerations and numerical
calculations [2]. In this work, medium dose electron microscopy is used to an in-depth characterization
of the product phases and especially this newly found allotrope known as Rh6 and Rh6-II having a pure
sp2 bonding.
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