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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Preparation of CO2-switchable graphene dispersions and their polystyrene nanocomposite latexes by direct exfoliation of graphite using hyperbranched polyethylene surfactants
TL;DR: In this paper, the preparation of CO2-switchable graphene dispersions by noncovalent exfoliation of graphite in water using a CO2 switchable star copolymer surfactant is described.
Journal ArticleDOI
Synthesis, microstructure, multifunctional properties of mayenite Ca 12 Al 14 O 33 (C12A7) cement and graphene oxide (GO) composites
Chaval Sriwong,Chaiwat Phrompet,Wattana Tuichai,Attaphol Karaphun,Ken Kurosaki,Chesta Ruttanapun +5 more
TL;DR: The composite materials of the pristine C12A7 cement with GO were highly efficient and contained a high potential for enhancing low-cost cement materials in multifunctional properties such as optical, dielectric, electrochemical, and mechanical properties.
Journal ArticleDOI
Nanoscale ear drum: Graphene based nanoscale sensors
Stas M. Avdoshenko,Stas M. Avdoshenko,Claudia Gomes da Rocha,Claudia Gomes da Rocha,Gianaurelio Cuniberti +4 more
TL;DR: It is demonstrated that the mass variation effect and information about the graphene-molecule interactions can be inferred through dynamical response functions and the potential use of graphene as a mass detector device is confirmed with remarkable precision.
Journal ArticleDOI
Graphene-Based Nanomaterials for Flexible and Stretchable Batteries.
TL;DR: In this paper, the recent progress in the development of flexible and stretchable batteries based on graphene, as well as its important technical issues are reviewed, and the unique processes involved in these two types enable the fabrication of flexible batteries with various shapes and functions.
Journal ArticleDOI
Collision dominated, ballistic, and viscous regimes of terahertz plasmonic detection by graphene
Yuhui Zhang,Michael Shur +1 more
TL;DR: In this article, the performance and operating regimes of graphene plasmonic field effect transistors (FETs) were investigated by a hydrodynamic model, and the analysis on the mobility dependence of the response time revealed the same detection regimes as the traditional semiconductor materials, i.e., the non-resonant (collision dominated) regime, the resonant ballistic regime, and viscous regime.
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.
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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.