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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Method and article
Peter Blake,Timothy J. Booth +1 more
TL;DR: In this article, a method of making an article (2) comprising an ultra-thin sheet (26) of material secured at lateral regions to a support member, the method comprises laying the ultra thin sheet on a substrate (20), forming the support member on the lateral regions of the ultrathin sheet such that the lateral region of the ultrathin sheet are sandwiched between the support part and the substrate and adhered to the support members, and removing the substrate by vaporisation or by a dissolution step using a solvent, to leave the article.
Journal ArticleDOI
Direct assessment of the mechanical modulus of graphene co-doped with low concentrations of boron–nitrogen by a non-contact approach
Shun-Hsien Pan,Henry Medina,Sheng-Bo Wang,Li-Jen Chou,Zhiming Wang,Zhiming Wang,Kuei-Hsien Chen,Kuei-Hsien Chen,Li-Chyong Chen,Yu-Lun Chueh +9 more
TL;DR: A novel non-contact approach is demonstrated to determine the in-plane stiffness of BNG at low BN concentrations and finds the BNG to be more sensitive than pristine graphene in response to externally applied strain, indicating that BNG is a more suitable material than graphene for strain sensor applications.
Journal ArticleDOI
Two-component structural phase-field crystal models for graphene symmetries
TL;DR: The three-point XPFC model of Seymour & Provatas is extended to two components to capture chemical vapour deposition-grown graphene, and a previous two-pointXPFC model is adapted to study the role of hydrogen in the dendritic growth morphologies of graphene.
Journal ArticleDOI
Mechanical and thermal behaviour of multi-layer graphene and nanosilica reinforced glass Fiber/Epoxy composites
TL;DR: In this article, the flexural strength of the composite of glass-epoxy (GE) containing nanosilica and multi-layer Graphene (MLG) was observed.
Journal ArticleDOI
High performance all-carbon composite transparent electrodes containing uniform carbon nanotube networks
Hyung Duk Yun,Jinsung Kwak,Se-Yang Kim,Han Seo,In Cheol Bang,Sung Youb Kim,Seoktae Kang,Soon-Yong Kwon +7 more
TL;DR: In this article, a flexible transparent electrodes (TE) with uniform CNT networks on a monolayer graphene/polyethylene terephthalate (PET) substrate via a simple air spray deposition method is presented.
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.