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
More filters
Journal ArticleDOI
STM observation of a box-shaped graphene nanostructure appeared after mechanical cleavage of pyrolytic graphite
TL;DR: In this paper, a three-dimensional box-shaped graphene (BSG) nanostructure formed/uncovered by mechanical cleavage of highly oriented pyrolytic graphite (HOPG) is described.
Journal ArticleDOI
Bond saturation significantly enhances thermal energy transport in two-dimensional pentagonal materials
Zeyu Liu,Xufei Wu,Vikas Varshney,Vikas Varshney,Jonghoon Lee,Jonghoon Lee,Guangzhao Qin,Ming Hu,Ajit K. Roy,Tengfei Luo +9 more
TL;DR: In this paper, a general rule for controlling the thermal transport in 2D pentagonal materials through bond saturation was identified, and the results revealed a general bonding-thermal transport relation for 2D materials, which can provide important guidance for designing novel materials with desirable thermal transport properties for energy applications.
Journal ArticleDOI
A Kriging Surrogate Model for Uncertainty Analysis of Graphene Based on a Finite Element Method
Jiajia Shi,Liu Chu,Robin Braun +2 more
TL;DR: The application of the Kriging surrogate model in vibration analysis of graphene sheets is proposed and the Latin hypercube sampling method effectively propagates the uncertainties in geometrical and material properties of the finite element model.
Journal ArticleDOI
Fracture mechanics of multi-layer molybdenum disulfide
TL;DR: In this article, the authors used a simulation data to verify the application of Griffith, Inglis and quantized fracture mechanics theories for the fracture of monolayer molybdenum disulfide (MoS2) sheets.
Journal ArticleDOI
Polymer-free, low tension graphene mechanical resonators
Benjamin Aleman,Michael Rousseas,Michael Rousseas,Yisheng Yang,William Regan,William Regan,Michael F. Crommie,Michael F. Crommie,Feng Wang,Feng Wang,Alex Zettl,Alex Zettl +11 more
TL;DR: Graphene resonators are fabricated using a polymer-free, direct transfer method onto metal reinforced holey carbon grids and the normal mode frequencies are measured using a Fabry-Perot technique using resonance curves indicate highly linear behaviour but very little built-in strain this paper.
References
More filters
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.