Journal ArticleDOI
Mechanical properties of suspended graphene sheets
TLDR
In this article, the Young's modulus of stacks of graphene sheets suspended over photolithographically defined trenches in silicon dioxide was measured using an atomic force microscope, with measured spring constants scaling as expected with the dimensions of the suspended section, ranging from 1to5N∕m.Abstract:
Using an atomic force microscope, we measured effective spring constants of stacks of graphene sheets (less than 5) suspended over photolithographically defined trenches in silicon dioxide. Measurements were made on layered graphene sheets of thicknesses between 2 and 8nm, with measured spring constants scaling as expected with the dimensions of the suspended section, ranging from 1to5N∕m. When our data are fitted to a model for doubly clamped beams under tension, we extract a Young’s modulus of 0.5TPa, compared to 1TPa for bulk graphite along the basal plane, and tensions on the order of 10−7N.read more
Citations
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A multiscale computational framework for the analysis of graphene involving geometrical and material nonlinearities
TL;DR: In this article, an atomistic-continuum approach is developed to simulate the mechanical behaviors of graphene, in which the constitutive model is derived from the lattice structure of graphene and calculated results reveal that the chirality of graphene has little effect on structural parameters and elastic properties.
Journal ArticleDOI
Control of the structure and properties of SEBS nanocomposites via chemical modification of graphene with polymer brushes
Patricia Enrique-Jiménez,Susana Quiles-Díaz,Horacio J. Salavagione,Daniel Wesner,Holger Schönherr,Jesús González-Casablanca,Roberto García-Quismondo,Gerardo Rodríguez Martínez,Marián A. Gómez-Fatou,Fernando Ania,Araceli Flores +10 more
TL;DR: In this paper, the interplay between the nature of the polymer brush grafted to graphene, the nanostructure of the nanocomposites and their final properties is analyzed.
Journal ArticleDOI
Force–conductance spectroscopy of a single-molecule reaction
Leopoldo Mejía,Ignacio Franco +1 more
TL;DR: It is demonstrated how simultaneous measurements of conductance and force can be used to monitor the step-by-step progress of a mechanically activated cis-to-trans isomerization single-molecule reaction, including events that cannot be distinguished using force or conductance alone.
Journal ArticleDOI
Nonlinear anisotropic deformation behavior of a graphene monolayer under uniaxial tension.
Lixin Zhou,Guoxin Cao +1 more
TL;DR: According to the bond deformation under uniaxial tension, graphene can be simplified as a spring-network including both nonlinear springs (resisting both the tensile and compressive load) and a very strong compressive angle-spring (Resisting the decrease of the C-C-C bond angle).
Journal ArticleDOI
Tuning the Mechanical and Adsorption Properties of Silica with Graphene Oxide
TL;DR: In this article, a modified Stober and Hummer's methods were used to synthesize graphene oxide (GO) composite powders of different compositions by introducing a GO sheet in between silica particles through a hydrothermal synthesis.
References
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Journal ArticleDOI
Two-dimensional gas of massless Dirac fermions in graphene
Kostya S. Novoselov,A. K. Geim,Sergey V. Morozov,Da Jiang,Mikhail I. Katsnelson,Irina V. Grigorieva,S. V. Dubonos,A. A. Firsov +7 more
TL;DR: This study reports an experimental study of a condensed-matter system (graphene, a single atomic layer of carbon) in which electron transport is essentially governed by Dirac's (relativistic) equation and reveals a variety of unusual phenomena that are characteristic of two-dimensional Dirac fermions.
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
Experimental observation of the quantum Hall effect and Berry's phase in graphene
TL;DR: In this paper, an experimental investigation of magneto-transport in a high-mobility single layer of Graphene is presented, where an unusual half-integer quantum Hall effect for both electron and hole carriers in graphene is observed.
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 Article
Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
TL;DR: An experimental investigation of magneto-transport in a high-mobility single layer of graphene observes an unusual half-integer quantum Hall effect for both electron and hole carriers in graphene.