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
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Mechanical, Elastic, and Adhesive Properties of Two‐Dimensional Materials: From Straining Techniques to State‐of‐the‐Art Local Probe Measurements
TL;DR: In this article , the main methods are reviewed to induce and characterize, at the nm level, mechanical deformations in 2D materials, such as graphene, hexagonal boron nitride (hBN), and transition metal dichalcogenides (TMDs), and one of their most promising applications is the realization of nano-electromechanical systems based on vibrating 2D membranes, potentially capable of operating at high frequencies (>100 MHz) and over a large dynamic range.
Journal ArticleDOI
A new direct growth method of graphene on Si-face of 6H-SiC by synergy of the inner and external carbon sources
Yang Zhiyuan,Shicai Xu,Zhao Lili,Jing Zhang,Zhengping Wang,Chen Xiufang,Xiufeng Cheng,Fapeng Yu,Xian Zhao +8 more
TL;DR: In this paper, an inner and external carbon synergy (IECS) method was proposed to grow graphene on Si-face of 6H-SiC. This method combined the advantages of chemical vapor deposition (CVD) and traditional epitaxial growth (EG) based on silicon carbide, which provided a feasible approach for growing graphene on the SiC substrates.
Journal ArticleDOI
Preparation of well-dispersed Pt nanoparticles on solvothermal graphene and their enhanced electrochemical properties
TL;DR: In this paper, a well-dispersed Pt nanoparticle-loaded graphene nanocomposites were prepared by a combination of solvothermal and seed-mediated methods, and the nanocomposition also exhibited stable electrochemical activity performance during the cycling test.
Journal ArticleDOI
Effects of physical boundary conditions on the transverse vibration of single-layer graphene sheets
Sadegh Sadeghzadeh,M. M. Khatibi +1 more
TL;DR: In this article, the effects of various boundary conditions on the molecular dynamics of graphene nanosheets were studied, and it was demonstrated that the use of a flexible base as a substrate satisfies the boundary condition with the best possible.
Journal ArticleDOI
Equilibrium and Stability of Anisotropic Hyperelastic Graphene Membranes
TL;DR: In this article, the equilibrium problem of anisotropic hyperelastic graphene membranes is addressed under the hypothesis of homogeneous deformations and the boundary-value problem is formulated for a graphene membrane subjected to biaxial loads.
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.
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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.