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
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Hybrid molecular dynamics–finite element simulations of the elastic behavior of polycrystalline graphene
A.R. Alian,S.A. Meguid +1 more
TL;DR: In this paper, a multiscale molecular dynamics (MD) and finite element (FE) modeling scheme was developed for determining the elastic and fracture properties of polycrystalline graphene, where the properties of a grain boundary connecting two adjacent graphene grains, with different lattice orientations, were first determined using MD simulations.
Journal ArticleDOI
Size, vacancy and temperature effects on Young's modulus of silicene nanoribbons
TL;DR: In this paper, the Young's modulus (YM) of defect-free and defective silicene nanoribbons (SNRs) as a function of length and temperature was investigated.
Journal ArticleDOI
Review on synthesis of three-dimensional graphene skeletons and their absorption performance for oily wastewater
TL;DR: This work presents an extensive summarization of recent progress in the synthesis methodologies and microstructures of 3D graphene foams and3D graphene-based foam and highlights their adsorption performance for oils and organic solvents.
Journal ArticleDOI
A First-Principle Theoretical Study of Mechanical and Electronic Properties in Graphene Single-Walled Carbon Nanotube Junctions
TL;DR: A comprehensive study of the mechanical and electrical performance of the junctions was performed by first-principles theory, and it is suggested that the band gap is increased with the length of CNTs, and its value should be dependent on the combined effect of both the graphene’s width and theCNTs’ length.
Journal ArticleDOI
Atomic lattice structure and continuum plate theories for the vibrational characteristics of graphenes
S. Arghavan,A. V. Singh +1 more
TL;DR: In this paper, a plane lattice structure made of tightly packed carbon atoms into an array of honeycomb-shaped cells was used to model the extensional and flexural rigidities of a single layer graphene sheet.
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.