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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Graphene: Promises, Facts, Opportunities, and Challenges in Nanomedicine
Hongying Mao,Sophie Laurent,Wei Chen,Omid Akhavan,Mohammad Imani,Ali Akbar Ashkarran,Morteza Mahmoudi +6 more
TL;DR: Nanomedicine Hong Ying Mao,† Sophie Laurent,‡ Wei Chen,*,†,§ Omid Akhavan, Mohammad Imani, Ali Akbar Ashkarran, and Morteza Mahmoudi.
Journal ArticleDOI
Recent developments on graphene and graphene oxide based solid state gas sensors
TL;DR: Graphene, a monolayer of graphite sheet consisting of sp2 hybridized carbon atoms covalently bonded to three other atoms (discovered in 2004), has recently attracted the attention of chemical sensor researchers owing to its unprecedented structural, mechanical and electrical properties.
Journal ArticleDOI
In situ Polymerization Approach to Graphene-Reinforced Nylon-6 Composites
TL;DR: In this article, the authors reported an efficient method to prepare nylon-6− (PA6−) graphene composites by in situ polymerization of caprolactam in the presence of graphene oxide (GO).
Journal ArticleDOI
Phonon softening and crystallographic orientation of strained graphene studied by Raman spectroscopy
TL;DR: Polarized Raman spectra of optical phonons in graphene monolayers under tunable uniaxial tensile stress constitutes a purely optical method for the determination of the crystallographic orientation of graphene.
Journal ArticleDOI
Single-Layer Group-III Monochalcogenide Photocatalysts for Water Splitting
TL;DR: In this paper, a first-principles design approach was used to determine that the single-layer group-III monochalcogenides exhibit low formation energies and are suitable for photocatalytic water splitting.
References
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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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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.
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Physical properties of crystals
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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.