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
Characterization of nanomechanical graphene drum structures
TL;DR: In this article, an analytical framework was formulated to model the deflection behavior which was verified through finite element simulations (FEM) and the experimental measurements agree well with analytical and finite element results using Young's modulus of 1 TPa.
Journal ArticleDOI
Graphene terahertz generators for molecular circuits and sensors.
TL;DR: The nanoribbon with fewer modes at the terahertz range is used to show a potential application of graphene acting as a sensor of single molecules, and the monolayer shows better performance due to the lower number of vibrational modes.
Journal ArticleDOI
Stability of graphene-based heterojunction solar cells
Eric Singh,Hari Singh Nalwa +1 more
TL;DR: In this article, the stability of graphene-based heterojunction solar cells under atmospheric conditions is evaluated, and the insertion of a graphene buffer layer into solar cell heterostructures stops degradation and enhances stability in solar cell devices.
Journal ArticleDOI
Fabrication of a superhydrophobic graphene surface with excellent mechanical abrasion and corrosion resistance on an aluminum alloy substrate
TL;DR: In this article, a superhydrophobic graphene film with excellent mechanical abrasion resistance and corrosion resistance was successfully deposited on Al alloy using a spin-coating method, which was found that the static water contact angle on the as-prepared surface was as high as 153.7 ± 2°.
Journal ArticleDOI
Latex routes to graphene-based nanocomposites
TL;DR: In this article, the authors describe recent advances in the elaboration of graphene-based colloidal nanocomposites by the use of graphene or graphene oxide in heterophase polymerization systems.
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.