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
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Thinnest Two‐Dimensional Nanomaterial—Graphene for Solar Energy
Yun Hang Hu,Hui Wang,Bo Hu +2 more
TL;DR: The status of graphene research for solar energy with emphasis on solar cells is presented, the preparation and properties of graphene are described, and applications of graphene as transparent conductive electrodes and counter electrodes are presented.
Journal ArticleDOI
Biaxial strain in graphene adhered to shallow depressions.
Constanze Metzger,Sebastian Remi,Mengkun Liu,Silvia Viola Kusminskiy,Antonio Castro Neto,Anna K. Swan,Bennett B. Goldberg +6 more
TL;DR: Graphene does not remain free-standing but instead adheres to the substrate despite the induced biaxial strain, and higher Raman shifts and Gruneisen parameters of the phonons underlying the G and 2D bands under biaXial strain are found.
Journal ArticleDOI
A novel and sensitive electrochemical DNA biosensor based on Fe@Au nanoparticles decorated graphene oxide
TL;DR: In this paper, a novel and sensitive electrochemical biosensor for selective determination of DNA was developed based on Fe@Au nanoparticles (Fe@ AuNPs) involving 2-aminoethanethiol (AET) functionalized graphene oxide (GO) and AETGO nanocomposite.
Journal ArticleDOI
Biological and environmental interactions of emerging two-dimensional nanomaterials.
Zhongying Wang,Wenpeng Zhu,Yang Qiu,Xin Yi,Annette von dem Bussche,Agnes B. Kane,Huajian Gao,Kristie J. Koski,Robert H. Hurt +8 more
TL;DR: A framework for more systematic investigation of biological behavior in the future is proposed, rooted in fundamental materials chemistry and physics, that considers three fundamental interaction modes: chemical interactions and phase transformations, electronic and surface redox interactions, and physical and mechanical interactions that are unique to near-atomically-thin, high-aspect-ratio solids.
Journal ArticleDOI
Graphene oxide: An efficient material and recent approach for biotechnological and biomedical applications.
Dinesh Pratap Singh,Carlos Herrera,Brijesh Singh,Shipra Singh,Rajesh Kumar Singh,Rajesh Kumar +5 more
TL;DR: This review deals with the bio application of GO and the recent advancement as a biosensors, antibacterial agent, early detection of cancer, cancer cell imaging/mapping, targeted drug delivery and gene therapy etc.
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.