Various carbon nanostructures and their properties are of great interest nowadays. It
is well known that graphene has unique mechanical properties among other carbon
nanomaterials and at some conditions graphene can show auxetic behavior which means that it
can have negative Poisson's ratio. From the consideration of the mechanical properties of
graphene and 3D carbon-based nanomaterials, several groups of promising candidates to be
auxetics can be mentioned. In this study, mechanical properties of strained graphene and
different diamond-like three-dimensional structures based on carbon nanotubes (tubulanes) are
investigated by molecular dynamics method. It is shown that graphene has negative Poisson's
ratio under homogeneous tensile strain above 0.12. It is found that three of the studied tubulanes
have negative Poisson's ratio.
Keywords: auxetics, graphene, tubulanes, carbon nanostructure, mechanical properties.
full paper (pdf, 2608 Kb)