Journal ArticleDOI
Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene
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TLDR
Graphene is established as the strongest material ever measured, and atomically perfect nanoscale materials can be mechanically tested to deformations well beyond the linear regime.Abstract:
We measured the elastic properties and intrinsic breaking strength of free-standing monolayer graphene membranes by nanoindentation in an atomic force microscope. The force-displacement behavior is interpreted within a framework of nonlinear elastic stress-strain response, and yields second- and third-order elastic stiffnesses of 340 newtons per meter (N m(-1)) and -690 Nm(-1), respectively. The breaking strength is 42 N m(-1) and represents the intrinsic strength of a defect-free sheet. These quantities correspond to a Young's modulus of E = 1.0 terapascals, third-order elastic stiffness of D = -2.0 terapascals, and intrinsic strength of sigma(int) = 130 gigapascals for bulk graphite. These experiments establish graphene as the strongest material ever measured, and show that atomically perfect nanoscale materials can be mechanically tested to deformations well beyond the linear regime.read more
Citations
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Liquid-phase exfoliation, functionalization and applications of graphene
TL;DR: A mini review of the current status of liquid-phase exfoliation of graphene from various types of graphite, followed by a topical summarization of recent progress in the functionalization and applications of graphene.
Journal ArticleDOI
Polymer-stabilized graphene dispersions at high concentrations in organic solvents for composite production
Ahmed S. Wajid,Sriya Das,Fahmida Irin,H.S. Tanvir Ahmed,John L. Shelburne,Dorsa Parviz,Robert J. Fullerton,Alan F. Jankowski,Ronald C. Hedden,Micah J. Green +9 more
TL;DR: In this article, a simple and effective technique for dispersing pristine (unfunctionalized) graphene at high concentrations in a wide range of organic solvents by use of a stabilizing polymer (polyvinylpyrrolidone, PVP).
Journal ArticleDOI
Growth of large single-crystalline two-dimensional boron nitride hexagons on electropolished copper.
Roland Yingjie Tay,Mark H. Griep,Govind Mallick,Siu Hon Tsang,Ram Sevak Singh,Travis Tumlin,Edwin Hang Tong Teo,Shashi P. Karna +7 more
TL;DR: The growth and characterization of novel large area h-BN hexagons using highly electropolished Cu substrate under atmospheric pressure CVD conditions are reported and it is found that the nucleation density ofh-BN is significantly reduced while domain sizes increase.
Journal ArticleDOI
Graphene mechanical oscillators with tunable frequency
Changyao Chen,Sunwoo Lee,Vikram Deshpande,Gwan Hyoung Lee,Gwan Hyoung Lee,Michael Lekas,Kenneth L. Shepard,James Hone +7 more
TL;DR: Graphene voltage-controlled oscillators built on micrometre-size, atomically thin graphene nanomechanical resonators, whose frequencies can be electrostatically tuned by as much as 14% exhibit frequency stability and a modulation bandwidth sufficient for the modulation of radiofrequency carrier signals.
Journal ArticleDOI
Direct exfoliation and dispersion of two-dimensional materials in pure water via temperature control
Jin-Seon Kim,Sanghyuk Kwon,Dae-Hyun Cho,Byunggil Kang,Hyukjoon Kwon,Youngchan Kim,Sung O Park,Gwan Yeong Jung,Eunhye Shin,Wan-Gu Kim,Hyungdong Lee,Gyeong Hee Ryu,Minseok Choi,Taehyeong Kim,Junghoon Oh,Sungjin Park,Sang Kyu Kwak,Suk Wang Yoon,Doyoung Byun,Zonghoon Lee,Changgu Lee +20 more
TL;DR: This work exfoliates 2D materials directly in pure water without using any chemicals or surfactants, and discovers that good solubility in water is maintained due to the presence of platelet surface charges as a result of edge functionalization or intrinsic polarity.
References
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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
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 ArticleDOI
The Phenomena of Rupture and Flow in Solids
TL;DR: In this article, the authors investigated the effect of surface scratches on the mechanical strength of solids, and some general conclusions were reached which appear to have a direct bearing on the problem of rupture, from an engineering standpoint, and also on the larger question of the nature of intermolecular cohesion.
Book
Physical properties of crystals
TL;DR: In this paper, the physical properties of crystals systematically in tensor notation are presented, presenting tensor properties in terms of their common mathematical basis and the thermodynamic relations between them.
Journal ArticleDOI
Strength and breaking mechanism of multiwalled carbon nanotubes under tensile load
TL;DR: The tensile strengths of individual multiwalled carbon nanotubes (MWCNTs) were measured with a "nanostressing stage" located within a scanning electron microscope and a variety of structures were revealed, such as a nanotube ribbon, a wave pattern, and partial radial collapse.