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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High orientation degree of graphene nanoplatelets in silicon nitride composites prepared by spark plasma sintering
Orsolya Tapasztó,Levente Tapasztó,Hartmut Lemmel,Victor Puchy,Ján Dusza,Csaba Balázsi,Katalin Balázsi +6 more
TL;DR: In this paper, a detailed structural characterization of the graphene nanoplatelet distribution was provided by scanning electron microscopy and ultra-small angle neutrons scattering investigations of spark plasma sintered Si 3 N 4 /graphene nanoplatelts composites.
Journal ArticleDOI
Sensor for volatile organic compounds using an interdigitated gold electrode modified with a nanocomposite made from poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) and ultra-large graphene oxide
Amirhossein Hasani,Hamed Sharifi Dehsari,Jaber Nasrollah Gavgani,Elham Khodabakhshi Shalamzari,Alireza Salehi,Farmarz Afshar Taromi,Mojtaba Mahyari +6 more
TL;DR: In this paper, a gas sensor based on a nanocomposite fabricated from poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) and ultra-large graphene oxide (UL-GO) is described.
Journal ArticleDOI
Thermal stability of graphene in inert atmosphere at high temperature
TL;DR: In this paper, the effect of temperature on the stability of single-layer graphene (SLG) in argon atmosphere was studied. And the results showed that the defects gradually extended from the boundary and holes in the layer to the edge.
Journal ArticleDOI
Inter-layer Potential for Hexagonal Boron Nitride
TL;DR: In this article, a new interlayer force-field for layered hexagonal boron nitride (h-BN) based structures is presented, which contains three terms representing the interlayer attraction due to dispersive interactions, repulsion due to anisotropic overlaps of electron clouds, and monopolar electrostatic interactions.
Journal ArticleDOI
Stability and synthesis of 2D metals and alloys: a review
TL;DR: A review of the recent theoretical works that aimed to understand the thermodynamic stability of 2D metals with or without geometrical confinements can be found in this paper, where the authors discuss some state-of-the-art 2D metal applications in bioimaging, photothermal therapy, sensing, nanodevices, and catalysis.
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.