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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Porous Reduced Graphene Oxide/Single-Walled CarbonNanotube Film as Freestanding and Flexible Electrode Materials forElectrosorption of Organic Dye
TL;DR: In this paper, the authors reported the application of electrochemically enhanced adsorption for enhanced removal of organic pollutants, but only a few researchers reported their application of this technology.
Journal ArticleDOI
Selective protein transport through ultra-thin suspended reduced graphene oxide nanopores.
Dae-Sik Lee,Seokhan Park,Yong Duk Han,Jae Eun Lee,Hu Young Jeong,Hyun C. Yoon,Moon Yeon Jung,Sang Ouk Kim,Sung-Yool Choi,Sung-Yool Choi +9 more
TL;DR: A reliable, cost-effective, and facile method for the fabrication of a graphene-based nanosieve and its application in the separation of similar-size proteins, and effectively separated hemoglobin from a mixture of hemoglobin and immunoglobulin G, the common proteins in human blood.
Reference BookDOI
Graphene Science Handbook : Mechanical and Chemical Properties
Mahmood Aliofkhazraei,Nasar Ali,William I. Milne,Cengiz S. Ozkan,Stanislaw Mitura,Juana L. Gervasoni +5 more
TL;DR: An In-Depth Look at the Outstanding Properties of Graphene as mentioned in this paper is a six-volume set that describes graphene's special structural, electrical, and chemical properties and considers how these properties can be used in different applications (including the development of batteries, fuel cells, photovoltaic cells, and supe
Journal ArticleDOI
Interfacial interaction of Ag nanoparticles with graphene oxide supports for improving NH3 and NO adsorption: a first-principles study
TL;DR: The electronic structure calculations show that the hybridization of the HOMO of NH3 with the conduction bands of Ag13-GOs results in the strong donor doping by an NH3 molecule, and gives rise to larger charge transfers from NH3 to the hybrid, compared to NH3 adsorption on isolated Ag13 and GOs.
Journal ArticleDOI
Effect of structural defects and chemical functionalisation on the intrinsic mechanical properties of graphene
Songül Güryel,Balázs Hajgató,Yves Dauphin,Jean-Marie Blairon,Hans Miltner,Frank De Proft,Paul Geerlings,Gregory Van Lier +7 more
TL;DR: The results indicate that when applying the deformation locally onto the system, higher local stress can be induced, as confirmed by Finite Element Analysis, and the presence of structural defects in the system will stiffen the system upon low strain, but reduces the elastic limit.
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.