Journal ArticleDOI
Mechanical properties of suspended graphene sheets
TLDR
In this article, the Young's modulus of stacks of graphene sheets suspended over photolithographically defined trenches in silicon dioxide was measured using an atomic force microscope, with measured spring constants scaling as expected with the dimensions of the suspended section, ranging from 1to5N∕m.Abstract:
Using an atomic force microscope, we measured effective spring constants of stacks of graphene sheets (less than 5) suspended over photolithographically defined trenches in silicon dioxide. Measurements were made on layered graphene sheets of thicknesses between 2 and 8nm, with measured spring constants scaling as expected with the dimensions of the suspended section, ranging from 1to5N∕m. When our data are fitted to a model for doubly clamped beams under tension, we extract a Young’s modulus of 0.5TPa, compared to 1TPa for bulk graphite along the basal plane, and tensions on the order of 10−7N.read more
Citations
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Journal ArticleDOI
Size effect in single layer graphene sheets and transition from molecular mechanics to continuum theory
TL;DR: In this paper , the size-dependent mechanical response of graphene is investigated with an entirely nonlinear molecular mechanics approach, and a continuum anisotropic membrane model for graphene in finite elasticity is presented.
Journal ArticleDOI
Construction of graphene network in Ni matrix composites: A molecular dynamics study of densification process
TL;DR: In this article , the authors investigated the formation mechanism of Graphene network reinforced Ni matrix composites (GN/Ni) by molecular dynamics and showed that discrete graphene sheets covered on Ni particles are assembled into an intact and continuous graphene network through interlayer and lateral connections.
Proceedings Article
Synthesis and characterization of graphene-based nanocomposites for EM shielding applications
Alessandro Giuseppe D'Aloia,Fabrizio Marra,Alessio Tamburrano,G. De Bellis,Maria Sabrina Sarto +4 more
TL;DR: In this paper, a novel graphene-based nanocomposites, consisting of a polymeric-based system filled with graphenenanoplatelets (GNP), are developed for application as low-cost lightweight electromagnetic shielding materials.
Journal ArticleDOI
First-Principle Study of Dislocation Slips in Impurity Doped Graphene
Fanchao Meng,Bin Ouyang,Jun Song +2 more
TL;DR: In this paper, the generalized-stacking-fault energy (GSFE) curves along two crystallographic slips, glide and shuffle, for both pristine graphene and impurity of boron (B) or nitrogen (N) doped graphene were examined.
Journal ArticleDOI
Mechanical properties of bundled carbon nanoscroll
Jie Huang,Chee How Wong +1 more
TL;DR: In this article, three individual single-layer graphene samples were put together as a bundle to study the effect of bundling on the mechanical properties of carbon nanoscrolls, and the simulation results showed that the bundled sample buckled at a slightly lower critical strain with an ultimate strength almost three times that of single sample.
References
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Journal ArticleDOI
Two-dimensional gas of massless Dirac fermions in graphene
Kostya S. Novoselov,A. K. Geim,Sergey V. Morozov,Da Jiang,Mikhail I. Katsnelson,Irina V. Grigorieva,S. V. Dubonos,A. A. Firsov +7 more
TL;DR: This study reports an experimental study of a condensed-matter system (graphene, a single atomic layer of carbon) in which electron transport is essentially governed by Dirac's (relativistic) equation and reveals a variety of unusual phenomena that are characteristic of two-dimensional Dirac fermions.
Journal ArticleDOI
Raman spectrum of graphene and graphene layers.
Andrea C. Ferrari,Jannik C. Meyer,Vittorio Scardaci,Cinzia Casiraghi,Michele Lazzeri,Francesco Mauri,S. Piscanec,Da Jiang,K. S. Novoselov,S. Roth,A. K. Geim +10 more
TL;DR: This work shows that graphene's electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers, and allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.
Journal ArticleDOI
Experimental observation of the quantum Hall effect and Berry's phase in graphene
TL;DR: In this paper, an experimental investigation of magneto-transport in a high-mobility single layer of Graphene is presented, where an unusual half-integer quantum Hall effect for both electron and hole carriers in graphene is observed.
Journal ArticleDOI
Two-dimensional atomic crystals
Kostya S. Novoselov,Da Jiang,Fred Schedin,Timothy J. Booth,V. V. Khotkevich,Sergey V. Morozov,Andre K. Geim +6 more
TL;DR: By using micromechanical cleavage, a variety of 2D crystals including single layers of boron nitride, graphite, several dichalcogenides, and complex oxides are prepared and studied.
Journal Article
Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
TL;DR: An experimental investigation of magneto-transport in a high-mobility single layer of graphene observes an unusual half-integer quantum Hall effect for both electron and hole carriers in graphene.