From flat graphene to bulk carbon nanostructures

Abstract

Studies on thin sheets and related materials are of high importance nowadays because of their great potential in various applications. The latest success in the production of graphene opens many new opportunities for the construction of novel three‐dimensional carbon nanostructures that exhibit good mechanical and electronic properties together with high specific surface area. Such novel nanostructures based on graphene sheets are very promising for energy storage devices, supercapacitors and stretchable electronics, to name a few. In this work, the mechanical responses of new bulk carbon nanostructures under hydrostatic pressure or shear strain are investigated, respectively, via molecular dynamics simulations. The size effect of the structural units on the strength of crumpled graphene is analyzed. The studied bulk carbon nanostructures are found to be extremely stable against diamondization. It is shown that the structures and mechanical properties of bulk carbon nanomaterials can be altered by severe plastic shear deformation. Shear strain leads to the formation of stable structures, even at relatively small strain.

Influence of nanochannels on Poisson's ratio of degenerate crystal of hard dimers

“…Such an interest was motivated by possible practical applications of such materials . Some very recent studies of auxetics performed by computer simulations are also worth to be mentioned here as, in similarity to the present work, they concern microscopic models .…”

The microscopic deformation mechanism of 3D graphene foam materials under uniaxial compression

“…In addition, graphene flake bending and cell-wall elastic depression were found to be two main deformation mechanisms in nano-indentation experiments [5]. With a full-atom molecular dynamics simulation technique, Baimova et al [25] investigated the mechanical response of graphene foam materials subjected to shear strain and found that the shear deformation could alter the microstructure and mechanical properties of the graphene foam material. However, many questions are still open with regard to such a novel material, whose mechanical properties is totally different from those of a single graphene and graphite [26e28].…”

Elastic Properties of Fullerites and Diamond‐Like Phases

“…The other class of bulk carbon nanomaterials is based on sp 2 carbon polymorphs bonded by weak van‐der‐Waals interactions, which can form an immense variety of structures . Among such nanomaterials, fullerite (a material consisting of fullerene molecules) is well known.…”