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
More filters
Journal ArticleDOI
Stress analysis of perforated graphene nano-electro-mechanical (NEM) contact switches by 3D finite element simulation
Mohd Amir Zulkefli,Mohd Ambri Mohamed,Kim Shyong Siow,Burhanuddin Yeop Majlis,Jothiramalingam Kulothungan,Manoharan Muruganathan,Hiroshi Mizuta +6 more
TL;DR: In this paper, a finite element method (FEM) simulation of the suspended double-clamped graphene beam-based NEM switches with standard and perforated beam structures is presented.
Journal ArticleDOI
Mechanical properties of rippled structure in suspended stacks of graphene
TL;DR: In this paper, the authors studied the mechanical properties of a suspended graphene layers which have ripples with stripe pattern, by using an atomic force spectroscopy, and they obtained a local spring constant mapping on the suspended graphene with ripple was obtained.
Journal ArticleDOI
Molecular vibrational spectroscopy characterization of epoxy graphene oxide from density functional calculations.
TL;DR: Both structure energy and spectra computations indicate that the oxidation functional groups are energetically favorable to aggregate together and to be close to one another on the opposite side of graphene surface.
Journal ArticleDOI
A Comparative Study on Optical, Electrical, and Mechanical Properties of Conducting Polymer-Based Electrodes.
TL;DR: Transparent, free-standing, conducting polypyrrole (PPy) film is successfully fabricated by a simple method using the spin-coating technique, providing feasible candidate for applications requiring flexible and conducting materials.
Journal ArticleDOI
Investigating the thermal conductivity of concrete/graphene nanocomposite by a multi-scale modeling approach
TL;DR: In this article, a multi-scale modeling approach is used to study the effect of adding graphene sheets to concrete matrix on the thermal conductivity of the concrete, and the results showed that adding graphene sheet to the concrete matrix can significantly improve the thermal properties of concrete.
References
More filters
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.