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Graphene is a two-dimensional carbon sheet with a single-layered atom thickness, which gives it unique physical and chemical properties.
Book ChapterDOI
01 Jan 2015
21 Citations
Graphene represents a conceptually new class of promising material that is only one atom thick and, on this basis, offers new roads into low-dimensional physics.
Journal ArticleDOI
Andre K. Geim, Kostya S. Novoselov 
01 Mar 2007-Nature Materials
35.2K Citations
More generally, graphene represents a conceptually new class of materials that are only one atom thick, and, on this basis, offers new inroads into low-dimensional physics that has never ceased to surprise and continues to provide a fertile ground for applications.
Computer simulation further confirms that a thinner graphene sheet will give more significant geometrical field enhancement at the corner of graphene sheet.
The characterisation of the single layer graphene sheet on this large scale provides new information previously unavailable on the mechanical stability of graphene with ultra high aspect ratio.
Open accessJournal ArticleDOI
Qiyuan He, Shixin Wu, Zongyou Yin, Hua Zhang 
07 May 2012-Chemical Science
644 Citations
The atomic thickness of the graphene sheet is extremely sensitive towards the change of local environment, making it an ideal channel material in field-effect transistors used as electronic sensors.
The present analysis provides the possibility of considering different combinations of layerwise boundary conditions in a multi-layered graphene sheet.
Furthermore, the sheet size considerably influences the mechanical characteristics of graphene under tensile loading.
For a graphene sheet with a fixed length, it is easy to fully conform to the substrate of small roughness.
Furthermore, this sheet has mechanical strength comparable to graphene.

Related Questions

How is thickness of iris?5 answersThe thickness of the iris varies in different regions and is influenced by factors such as age and gender. Using optical coherence tomography (OCT), several studies have measured iris thickness in healthy individuals. One study found that the thickness of the nasal iris increased with age, while the temporal iris did not show a significant correlation with age. Another study found a significant correlation between iris thickness and choroidal thickness at different points. In a study comparing healthy individuals with patients with Fuchs' uveitis, it was observed that iris thickness was significantly lower in the affected eyes. Additionally, a study in the Saudi population found that iris thickness was thicker in males compared to females and varied with refractive error. In children, iris thickness was found to increase with age and was influenced by factors such as axial length, corneal curvature, and anterior chamber depth.
What is the mean interlayer distance bewtween graphite sheets?4 answersThe mean interlayer distance between graphite sheets is influenced by various factors. One study found that the interlayer distances between graphene sheets controlled by hydrated cations were 9.35, 8.96, and 8.82 A for hydrated Li+, Na+, and K+ ions, respectively. Another study showed that the interlayer distance of graphite oxide treated with c-rays was expanded to 2.09 nm due to increased topological defects and improved steric hindrance between interlayers. Additionally, the interlayer distance in twisted bilayer graphene (tBLG) was found to be 0.74 nm for a twist angle of 5° and 1.66 nm for a twist angle of 24°. Furthermore, the interlayer distance of thermally reduced graphene oxide sheets was enlarged from 0.41 nm to 2.51 nm through ionic interaction with intercalated cetyltrimethylammonium bromide (CTAB) and ionic liquids (ILs). Finally, first principles calculations suggested that the interlayer distance of two-layer graphene is close to that of graphite.
What is the effect of graphene oxide membrane thickens on interlayer distance?5 answersThe interlayer distance of graphene oxide (GO) membranes is affected by the thickness of the membrane. Thicker membranes tend to have larger interlayer distances, while thinner membranes have smaller interlayer distances. For example, a layer-stacked GO membrane in different organic solvents can have an interlayer spacing of up to 2.7 nm when the solvents cause significant GO swelling. On the other hand, a GO-based membrane with an interlayer distance greater than 40 nm can be synthesized by constructing a 2D/2D nanoheterojunction of vertically grown covalent organic framework (COF) nanosheets on GO nanosheets. Additionally, the interlayer distance of GO membranes can be tuned using vein-like supramolecular dendrimers as crosslinkers, resulting in interlayer distances ranging from 0.43 to 0.76 nm. The effect of anions on the interlayer spacing of GO membranes is still under investigation, but it has been discovered that anions can sustain the interlayer spacing by forming ion bridges.
How thick are silicon solar cells?5 answersSilicon solar cells can have different thicknesses depending on the specific application and technology used. The optimal thickness for crystalline silicon solar cells is around 49 μm. However, liquid phase crystallized silicon on glass can have a thickness range of 10-40 μm. It is possible to fabricate crystalline silicon solar cells with thicknesses ranging from a few hundreds of micrometers to as thin as 1 μm. The limiting efficiency for cells in the thickness range of 40-500 μm is close to 29%. Decreasing the thickness below around 40 μm is counter-productive as it significantly reduces the maximum achievable efficiency. Highly flexible modules using thin silicon crystalline cells with a thickness of 65±5 μm have also been demonstrated.
What is the thickness of cold formed steel?5 answersCold-formed steel has varying thicknesses depending on the specific application and design requirements. The abstracts mention different thicknesses for cold-formed steel, ranging from 0.35 to 0.8 mm (), 1.0 and 1.2 mm (), 1.6 mm (), and 0.7mm, 0.9mm, and 1.2mm (). These thicknesses are chosen based on factors such as the structural load, material properties, and desired performance of the cold-formed steel members. The use of different thicknesses allows for flexibility in design and construction, providing options for lightweight and economical solutions.
What is thickness swelling?3 answersThickness swelling refers to the increase in thickness of a material, typically wood-based composites, when exposed to moisture. It is a significant factor that can affect the physical and strength properties of the material. The mechanism of thickness swelling involves various factors such as the degree of built-up internal stresses, water uptake by encapsulated wood particles, and interfacial separations. The rate of thickness swelling can vary depending on factors such as the moisture content, density, resin content, and particle size of the material. Studies have been conducted to understand the thickness swelling behavior of different wood-based composites, including particleboards and oriented strandboards (OSB). These studies have used techniques such as scanning electron microscopy to observe the morphological changes in the internal structures of the composites.