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
Molecular dynamics modeling and simulations to understand gate-tunable graphene-nanoribbon-resonator
TL;DR: In this article, the vibrational properties of a graphene-nanoribbon-resonator were investigated by classical molecular dynamics modeling and simulations and the resonance frequency could be tuned by the induced tension due to the driving force, and increased with increasing driving force.
Journal ArticleDOI
Dry transfer of chemical-vapor-deposition-grown graphene onto liquid-sensitive surfaces for tunnel junction applications
Ying Feng,Ke Chen +1 more
TL;DR: The results suggest that large-scale CVD-grown graphene can be transferred with good quality and without contaminating the target surface by any liquid.
Journal ArticleDOI
Molecular dynamics simulation study on graphene-nanoribbon-resonators tuned by adjusting axial strain
TL;DR: In this article, a tunable graphene-nanoribbon (GNR)-resonator was investigated via classical molecular dynamics simulations, and it was shown that GNR-resonators with small axial-strains were more widely tuned by the gate, and almost linearly increased with increasing mean deflection.
Journal ArticleDOI
Indentation behavior of the stiffest membrane mounted on a very compliant substrate: Graphene on PDMS
TL;DR: In this article, the indentation response of a graphene monolayer mounted on a PDMS substrate (graphene/PDMS) is studied by both experimental and computational investigations due to the huge elastic modulus ratio between membrane and substrate and the very large ratio of indentation depth to membrane thickness.
Journal ArticleDOI
Facile synthesis of a BiFeO3/nitrogen-doped graphene nanocomposite system with enhanced photocatalytic activity
TL;DR: In this paper, the structural and morphological properties of the pure BFO nanoparticles, NG, and BFO/NG nanocomposites were studied by X-ray diffraction, scanning electron microscopy (SEM), and transmission electron microscope.
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.