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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Journal ArticleDOI
Surface functionalization of few-layer graphene on β-SiC(001) by Neutral Red dye
D.V. Potorochin,Alexander N. Chaika,O. V. Molodtsova,V. Yu. Aristov,Dmitry Marchenko,Dmitry Smirnov,Anna A. Makarova,Brian Walls,Kuanysh Zhussupbekov,Killian Walshe,Igor V. Shvets,A. Ciobanu,M. K. Rabchinskii,Nikolai V. Ulin,M. V. Baidakova,Pavel N. Brunkov,Serguei L. Molodtsov +16 more
TL;DR: In this paper , the formation of a composite phenazine dye/graphene structure with a large energy gap was studied using X-ray photoelectron spectroscopy, near-edge x-ray absorption fine structure, photoemission electron microscopy, scanning tunneling microscopy and density functional theory calculations.
Journal ArticleDOI
Stability of suspended monolayer graphene membranes in alkaline environment
Alessio Miranda,Axel Lorke +1 more
TL;DR: In this article, the structural, chemical and electrical compatibility of graphene in an alkaline environment, namely diluted KOH solutions as those used in standard nanofabrication methods was investigated.
Journal ArticleDOI
Indentation size effects in graphene oxide under suspended nanoindentation
E. Alejandra Huitrón Segovia,D. Torres Torres,J. Raúl Pérez Higareda,Alejandra García-García +3 more
TL;DR: In this paper, measurements of the elastic properties and the pre-stress of free-standing multilayers graphene oxide (GO) sheets were performed by suspended nanoindentation tests, using two indenter radius with values of approximately 50nm and 636nm, in an atomic force microscope and a triboindenter system respectively.
Proceedings ArticleDOI
Impact of carbon material on RF MEMS switch
TL;DR: In this paper, the properties of Graphene for RF M/NEMS applications are briefly described and compared with metallic RF MEMS switches such as Aluminium and Gold, and the analytical study and simulation results show that the actuation voltage of Al and Au switches is high (35 V) whereas the actuator voltage for the Graphee switch is low (7.7 V).
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.