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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Two-dimensional nanosheets for electrocatalysis in energy generation and conversion
TL;DR: In this article, the authors describe recent advances in nanosheet electrocatalysis of oxygen reduction, oxygen evolution, hydrogen evolution, and CO2 reduction reactions, and find that carbon-free carbon nanosheets outperform classical noble metal catalysts in several of these applications and show high potential in others.
Journal ArticleDOI
Electronic and Optoelectronic Applications Based on 2D Novel Anisotropic Transition Metal Dichalcogenides
Chuanhui Gong,Zhang Yuxi,Wei Chen,Junwei Chu,Tianyu Lei,Junru Pu,Dai Liping,Wu Chunyang,Yuhua Cheng,Tianyou Zhai,Liang Li,Jie Xiong +11 more
TL;DR: A comprehensive review of anisotropic MTe2 and ReX2, focusing on their recent progresses and various applications in recent years, and the crystalline structure and the origin of the strong anisotropy characterized by various techniques are discussed.
Journal ArticleDOI
Graphene-based gas sensor: metal decoration effect and application to a flexible device
Byung Jin Cho,Jongwon Yoon,Myung Gwan Hahm,Dongho Kim,Ah Ra Kim,Yung Ho Kahng,Sangwon Park,Young-Joo Lee,Sung-Gyu Park,Jung-Dae Kwon,Chang Su Kim,Myungkwan Song,Yongsoo Jeong,Kee-Seok Nam,Heung Cho Ko +14 more
TL;DR: In this paper, the role of metal nanoparticles (NPs) on graphene-based devices was investigated in terms of gas-sensing characteristics of NO2 and NH3, and flexible gas sensing was also realized for future applications.
Journal ArticleDOI
A highly stretchable and sensitive strain sensor based on graphene–elastomer composites with a novel double-interconnected network
TL;DR: In this paper, a double-interconnected network composed of compactly continuous graphene conductive networks was designed and constructed using the composites, thereby resulting in an ultralow percolation threshold of 0.3 vol%, approximately 12-fold lower than that of the conventional graphene-based composites with a homogeneously dispersed morphology.
Journal ArticleDOI
Self-assembly of CoS2/graphene nanoarchitecture by a facile one-pot route and its improved electrochemical Li-storage properties
TL;DR: In this article, a CoS2/graphene nanoarchitecture was synthesized by a facile one-step hydrothermal route using graphite oxide, thioacetamide, and CoCl2·6H2O as the starting materials.
References
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Journal ArticleDOI
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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
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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.
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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.