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
Physical insight into patterned graphene microwave absorber by using transmission matrix method
TL;DR: In this paper, a generalized transmission matrix method (TMM) was proposed for the theoretical design and analysis of the microwave absorbers, where each layer of the absorbing structure is analyzed independently and then characterized in terms of a multidimensional transmission matrix.
Book ChapterDOI
Engineering Carbon Nanomaterials for Stem Cell-Based Tissue Engineering
Tapas R. Nayak,Weibo Cai +1 more
TL;DR: Results indicate carbon nanomaterial-based scaffolds as excellent nanoplatforms for tissue engineering and stem cell-based regenerative medicine but sufficient in vivo studies together with relevant toxicity and biocompatibility data are necessary for their future application as an implantable tissue engineering material.
Journal ArticleDOI
First principle calculations of thermodynamic properties of pure graphene sheet and graphene sheets with Si, Ge, Fe, and Co impurities
A Kheyri,Zahra Nourbakhsh +1 more
TL;DR: In this paper, the thermal properties of pure graphene and graphene-impurity (impurity = Fe, Co, Si, and Ge) sheets have been investigated at various pressures (0−7 GPa) and temperatures (0 −900 K).
Proceedings ArticleDOI
Microfabricated support structures for investigations of mechanical and electrical graphene properties
TL;DR: In this paper, the grid of microstructures which is used for the graphene mechanical and electrical properties investigation is presented. And the design of the mask used for grid production is presented, and the technological process for the grid production are described.
Journal ArticleDOI
Ultrathin graphene-based solar cells
TL;DR: In this article, the authors demonstrate the use of graphene as the top electrode for ultrathin solar cells and demonstrate the ability to produce solid-state dye-sensitized solar cells with TiO2 thicknesses between 5 nm and 100 nm, which represents some of the thinnest solar cells produced to date.
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.