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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A molecular dynamics study of the mechanical properties of hydrogen functionalized graphene
TL;DR: In this article, the Young's modulus, tensile strength, and fracture strain of functionalized graphene deteriorate with increasing H-coverage up to about 30% and beyond this limit, the mechanical properties remain insensitive to Hcoverage, and they show that this drastic deterioration in mechanical strength arises both from the conversion of sp 2 to sp 3 bonding and due to easy rotation of unsupported sp 3 bonds.
Journal ArticleDOI
Strain engineering of graphene: a review
Chen Si,Zhimei Sun,Feng Liu +2 more
TL;DR: The current progress in the strain engineering of graphene is reviewed and the electron-phonon coupling greatly enhanced by the biaxial strain and the strong pseudomagnetic field induced by the non-uniform strain with specific distribution is highlighted.
Journal ArticleDOI
Growth of graphene from food, insects, and waste.
TL;DR: This work has developed a less expensive approach using six easily obtained, low or negatively valued raw carbon-containing materials used without prepurification to grow graphene directly on the backside of a Cu foil at 1050 °C under H(2)/Ar flow.
Journal ArticleDOI
Graphene-based carbon-layered electrode array technology for neural imaging and optogenetic applications
Dong-Wook Park,Amelia A. Schendel,Solomon Mikael,Sarah K. Brodnick,Thomas J. Richner,Jared P. Ness,Mohammed R. Hayat,Farid Atry,Seth Frye,Ramin Pashaie,Sanitta Thongpang,Zhenqiang Ma,Justin C. Williams +12 more
TL;DR: An array of interfacing abilities of the CLEAR device are demonstrated and its utility for neural applications, including optogenetic activation of focal cortical areas directly beneath electrodes, in vivo imaging of the cortical vasculature via fluorescence microscopy and 3D optical coherence tomography.
Journal ArticleDOI
Recent Progress on Layered Double Hydroxides and Their Derivatives for Electrocatalytic Water Splitting
TL;DR: Recent progress onLDHs and their derivatives as advanced electrocatalysts for water splitting is summarized, current strategies for their designing are proposed, and significant challenges and perspectives of LDHs are discussed.
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.
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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.