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Size and Chirality Dependent Elastic Properties of Graphene Nanoribbons

Summary: Size and Chirality Dependent Elastic
Properties of Graphene Nanoribbons
under Uniaxial Tension
H. Zhao, K. Min, and N. R. Aluru*
Department of Mechanical Science and Engineering, Beckman Institute for AdVanced
Science and Technology, UniVersity of Illinois at Urbana-Champaign,
Urbana, Illinois 61801
Received May 6, 2009; Revised Manuscript Received July 14, 2009
We investigate the mechanical strength and properties of graphene under uniaxial tensile test as a function of size and chirality using the
orthogonal tight-binding method and molecular dynamics simulations with the AIREBO potential. Our results on Young's modulus, fracture
strain, and fracture strength of bulk graphene are in reasonable agreement with the recently published experimental data. Our results indicate
that fracture strain and fracture strength of bulk graphene under uniaxial tension can have a significant dependence on the chirality. Mechanical
properties such as Young's modulus and Poisson's ratio can depend strongly on the size and chirality of the graphene nanoribbon.
Graphenesdefined as the monolayer of honeycomb lattice
packed with carbon atomsshas gained significant attention
recently after experiments showed its two-dimensional lattice
and sophisticated low-dimensional electronic prop-


Source: Aluru, Narayana R. - Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign


Collections: Engineering; Materials Science