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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Buckled circular monolayer graphene: a graphene nano-bowl
Mehdi Neek-Amal,F. M. Peeters +1 more
TL;DR: The prediction of elasticity theory for the buckling threshold of a radially stressed plate is presented and its results are compared to the one of the atomistic simulation.
Journal ArticleDOI
Bilayer graphene: physics and application outlook in photonics
TL;DR: In this paper, the application of bilayer graphene as a sensitive and fast photodetector is reviewed, and an outlook is given in the final part of the paper. But the authors focus on one specific two-dimensional material: bilayer GAs.
Journal ArticleDOI
Developing ultrasensitive pressure sensor based on graphene nanoribbon: Molecular dynamics simulation
TL;DR: In this article, the authors proposed schematics for an ultra-sensitive pressure sensor based on graphene-nanoribbon (GNR) and investigated its electromechanical properties using classical molecular dynamics simulations and piezo-electricity theory.
Journal ArticleDOI
A molecular dynamics investigation of the mechanical properties of graphene nanochains
TL;DR: In this article, the authors investigate the properties of a new carbon nanostructure, termed a graphene nanochain, constructed by sewing up pristine or twisted graphene nanoribbons and interlocking the obtained nanorings.
Journal ArticleDOI
In-situ mechanics of 3D graphene foam based ultra-stiff and flexible metallic metamaterial
TL;DR: A 3D macroporous graphene foam based ultra-lightweight, stiff and fatigue-resistant mechanical metamaterial is developed in this article, which has an extraordinary spring constant of ∼15'N/m and an upward of 70% recoverable deformation.
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.