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
Kinetic Control over Morphology of Nanoporous Graphene on Surface.
TL;DR: A detailed study of the coupling reactions of a planar halogen-substituted nanographene molecular precursor, hexaiodo-peri-hexabenzocoronene (I6 -HBC), on the Au(111) surface in the synthesis of NPG is reported.
Book ChapterDOI
Mechanical Properties of Carbon Nanotubes and Graphene
Zhong Hu,Xiaoxing Lu +1 more
TL;DR: In this paper, the authors introduce the concepts that define the mechanical properties of carbon nanotubes (CNTs) and graphene, such as elasticity, plasticity, linearity, instability and fracture behaviour.
Journal ArticleDOI
Surface roughness and size effects on the morphology of graphene on a substrate
Liting Xiong,Yuanwen Gao +1 more
TL;DR: In this paper, the morphology and snap-through transitions of multilayer graphene on a corrugated elastic substrate whose surface roughness is determined by surface amplitude and wavelength were investigated.
Book ChapterDOI
Sequential and Concurrent Multiscale Modeling of Multiphysics: From Atoms to Continuum
TL;DR: In this paper, a more general governing equation of non-equilibrium molecular dynamics, covering thermo-mechanical-electromagnetic coupling effects, has been derived, which provides a solid foundation for our bottom-up sequential multiscale modeling, from which we calculate material properties including the elastic constants, thermal conductivity, specific heat and thermal expansion coefficients for thermoelasticity.
Journal ArticleDOI
Microscopic characterisation of suspended graphene grown by chemical vapour deposition
Luca Bignardi,Willem F. van Dorp,Stefano Gottardi,Oleksii Ivashenko,Pavel Dudin,Alexei Barinov,Jeff Th. M. De Hosson,Meike Stöhr,Petra Rudolf +8 more
TL;DR: It is demonstrated that the suspended graphene membrane locally shows electronic properties comparable with those of samples prepared by micromechanical cleaving of graphite, and the area of high quality suspended graphene is limited by the folding of the graphene during the transfer.
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.