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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Journal ArticleDOI
Electrical Conductivity of Graphene Composites with In and In-Ga Alloy
A. Naga Sruti,K. Jagannadham +1 more
TL;DR: In this paper, the electrical resistivity and temperature coefficient of resistance (TCR) were measured using a four-probe method in the temperature range of 260-K to 340-K, and the results were used to determine the volume fraction of graphene from effective mean field analysis.
Proceedings ArticleDOI
Graphene has ultra high piezoresistive gauge factor
TL;DR: The first use of graphene as a piezoresistive element in a MEMS device was reported in this article, where the authors reported a very high gauge factor of 18×104.
Journal ArticleDOI
Ultrafast Method for Selective Design of Graphene Quantum Dots with Highly Efficient Blue Emission
Suk Hyun Kang,Sungwook Mhin,HyukSu Han,Kang Min Kim,Jacob L. Jones,Jeong Ho Ryu,Ju Seop Kang,Shin Hee Kim,Kwang Bo Shim +8 more
TL;DR: A facile and remarkably rapid method for production of GQDs exhibiting excellent optoelectronic properties from multi-wall carbon nanotube precursors by using pulsed laser ablation (PLA) technique, which will further open up new routes for the preparation of different optoelected nanomaterials.
Journal ArticleDOI
Graphene oxide nanoribbons (GNO), reduced graphene nanoribbons (GNR), and multi-layers of oxidized graphene functionalized with ionic liquids (GO-IL) for assembly of miniaturized electrochemical devices.
TL;DR: In this critical review, new nanomaterials based on graphene (GN) are described, especially those used for the assembly of miniaturized electrochemical transducers, as well as their use for assembly of chemically modified sensors, biosensors, and immunosensors.
Journal ArticleDOI
A numerical method for magneto-hygro-thermal dynamic stability analysis of defective quadrilateral graphene sheets using higher order nonlocal strain gradient theory with different movable boundary conditions
Reza Kolahchi,Farzad Kolahdouzan +1 more
TL;DR: In this paper, the authors evaluated the dynamic stability of a viscoelastic defective single layered graphene sheet (SLGS) under hygrothermal loads and in-plane magnetic forces.
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.