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
Citations
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Journal ArticleDOI
Graphene-P(VDF-TrFE) multilayer film for flexible applications.
Sang-Hoon Bae,Orhan Kahya,Bhupendra K. Sharma,Junggou Kwon,Hyoung J. Cho,Barbaros Özyilmaz,Jong Hyun Ahn +6 more
TL;DR: Graphene/P(VDF-TrFE)/graphene multilayer film is used as an effective doping layer for graphene and contributes significantly to decreasing the sheet resistance of graphene to 188 ohm/sq.
Journal ArticleDOI
Synthesis of network reduced graphene oxide in polystyrene matrix by a two-step reduction method for superior conductivity of the composite
TL;DR: In this article, a two-step in situ reduction technique was proposed for polystyrene/reduced graphene oxide (PS/r-GO) composites, which consists of a hydrazine hydrate reduction and a subsequent thermal reduction at 200 °C for 12 h. The results show that the GO sheets are well dispersed and ultimately form a continuous network structure in the polymer matrix.
Journal ArticleDOI
Graphene–nickel composites
TL;DR: Graphene/nickel composites were prepared by electrodeposition in a nickel sulfamate solution with graphene oxide (GO) sheets in suspension as discussed by the authors, which showed the thermal conductivity of the composites to be about 15% more than that of pure nickel electrodeposits.
Journal ArticleDOI
Graphene-reinforced metal matrix nanocomposites – a review
TL;DR: The research works of graphene-reinforced metal matrix composites are summarized in this paper, where the microstructure and mechanical properties, processing techniques, graphene dispersion, strengthening mechanisms, interfacial reactions between graphene and the metal matrix and future research works in this field are discussed.
Journal ArticleDOI
Superconducting Calcium-Intercalated Bilayer Graphene.
TL;DR: It is observed that the zero-resistance state occurs in C6CaC6 with the onset temperature of 4 K, while the T(c)(onset) is gradually decreased upon applying the magnetic field, which directly proves the superconductivity origin of the zero resistance in C 6CaC 6.
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.