Journal ArticleDOI
Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene
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
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Tribological properties of oleic acid-modified graphene as lubricant oil additives
Wei Zhang,Ming Zhou,Hongwei Zhu,Yu Tian,Kunlin Wang,Jinquan Wei,Fei Ji,Xiao Li,Zhen Li,Peng Zhang,Dehai Wu +10 more
TL;DR: In this article, liquid phase exfoliated graphene sheets were modified by oleic acid and dispersed in lubricant oils as additives, and the tribological properties of graphene-contained oils were investigated using a four-ball tribometer.
Journal ArticleDOI
Highly Efficient Synthesis of Graphene Nanocomposites
TL;DR: It is demonstrated that the simple casting of a polymer solution containing dispersed graphene oxide, followed by thermal reduction, can produce well-isolated monolayer reduced-graphene oxide reinforced polymers without complex manufacturing, dispersion or reduction processes.
Journal ArticleDOI
Review of carbon-based electrode materials for supercapacitor energy storage
Richa Dubey,Velmathi Guruviah +1 more
TL;DR: A review of different carbon-based materials used in the fabrication of electrodes for electrochemical capacitors is presented in this paper, along with materials used, a brief overview of different types of supercapacitors depending on charge storage mechanism is also discussed.
Journal ArticleDOI
Measurement of the cleavage energy of graphite
TL;DR: The first direct, accurate experimental measurement of the CE of graphite is reported using a novel method based on the self-retraction phenomenon in graphite, which is nearly invariant with respect to temperature, and insensitive to impurities from the atmosphere.
Journal ArticleDOI
Two-terminal floating-gate memory with van der Waals heterostructures for ultrahigh on/off ratio
Quoc An Vu,Yong Seon Shin,Young Rae Kim,Van Luan Nguyen,Won Tae Kang,Hyun Kim,Dinh Hoa Luong,Il Min Lee,Kiyoung Lee,Dong-Su Ko,Jinseong Heo,Seongjun Park,Young Hee Lee,Woo Jong Yu +13 more
TL;DR: A two-terminal floating gate memory, tunnelling random access memory fabricated by a monolayer MoS2/h-BN/monolayer graphene vertical stack, demonstrates an ultimately low off-state current of 10−14 A, leading to ultrahigh on/off ratio over 109, about ∼103 times higher than other two-Terminal memories.
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.