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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Large-Scale Suspended Graphene Used as a Transparent Substrate for Infrared Spectroscopy.
Hai Hu,Hai Hu,Baoxing Liao,Xiangdong Guo,Debo Hu,Xiaofen Qiao,Ning Liu,Liu Ruina,Ke Chen,Bai Bing,Xiaoxia Yang,Qing Dai,Qing Dai +12 more
TL;DR: The unique optical properties of suspended graphene are determined to be superior to those of conventional IR window materials, giving this new substrate great potential as part of a new generation of IR transparent substrates, especially for use in examining nanoscale samples.
Journal ArticleDOI
Graphene as a Piezoresistive Material in Strain Sensing Applications
Farid Sayar Irani,Ali Hosseinpour Shafaghi,Melih Can Tasdelen,Tugce Delipinar,Ceyda Elcin Kaya,Guney Guven Yapici,Murat Kaya Yapici +6 more
TL;DR: The present review provides an in-depth overview of the latest studies focusing on graphene and its strain sensing mechanism along with various applications, and demonstrates the material synthesis, device fabrication and integration challenges for researchers to achieve both wide strain range and high sensitivity in graphene-based strain sensors.
Journal ArticleDOI
Strain Engineering of Low‐Dimensional Materials for Emerging Quantum Phenomena and Functionalities
SungWoo Nam,Hong Gyu Park +1 more
TL;DR: A recent review of strain-tunable quantum properties and functionalities can be found in this article , with a focus on low-dimensional quantum materials, including 2D van der Waals materials and heterostructures.
Journal ArticleDOI
Molybdenum disulfide dc contact MEMS shunt switch
TL;DR: In this article, an atomic force microscopy pulsed force mode verifies that molybdenum disulfide (MoS2) has a smaller surface adhesion energy than graphene.
Journal ArticleDOI
Computational studies at the density functional theory (DFT) level about the surface functionalization of hexagonal monolayers by chitosan monomer
TL;DR: Theoretical investigations based on density functional theory have been carried out to understand the underlying interactions between the chitosan monomer and several types of hexagonal monolayers consisting of pristine and defected graphene and boron-nitride nanosheets as mentioned in this paper.
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.
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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.