definition of graphene
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- Graphene (/ˈɡræf.iːn/) is an allotrope of carbon in the form of a two-dimensional, atomic-scale, honey-comb lattice in which one atom forms each vertex. It is the basic structural element of other allotropes, including graphite, charcoal, carbon nanotubes and fullerenes.
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- A new modeling paper suggests that graphene's electronic properties may allow it to exhibit chiral superconductivity with the addition of impurities, a process familiar from semiconductor technology, where it's known as doping.
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graphite Medical Definition of GRAPHITE. : carbon of a soft black lustrous form that conducts electricity and is used in lead pencils and electrolytic anodes, as a lubricant, and as a moderator in nuclear reactors—called also plumbago.ull Definition of GRAPHITE. 1. : a soft black lustrous form of carbon that conducts electricity and is used in lead pencils and electrolytic anodes, as a lubricant, and as a moderator in nuclear reactors. 2. : a composite material in which carbon fibers are the reinforcing material. — gra·phit·ic \gra-ˈfi-tik\ adjective.
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Porygon Locations: You can't catch Porygon in the wild, but you can buy one in the Celadon City Game Corner. The catch is that you need to earn coins by playing slots (or by purchasing them at a rate of $1,000 for 50 coins). Porygon is a Normal type Pokémon, which means it doesn't really have any particular type advantages. On the downside, it's got three disadvantages, which you can exploit if you're up against a Normal types like Porygon.
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carbon A nonmetallic element occuring in many inorganic and in all organic compounds, existing as graphite and diamond and as a constituent of coal, limestone, and petroleum, and capable of chemical self-bonding to form a number of important molecules. Atomic number 6; atomic weight 12.01115; sublimation point above 3,500°C; melting point 3,550°C; specific gravity of amorphous carbon 1.8 to 2.1, of diamond 3.15 to 3.53, of graphite 1.9 to 2.3; valence 2, 3, 4.
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- noun. A stable isotope of carbon, mass number 13, which makes up about 1.1 per cent of natural carbon and is used in isotopic labelling and nuclear magnetic resonance studies. [mass noun] The chemical element of atomic number 6, a non-metal which has two main forms (diamond and graphite) and which also occurs in impure form in charcoal, soot, and coal. (Symbol: C). Example sentences. 1  Combustion, or burning, is a chemical process involving carbon, hydrogen and oxygen.
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What is the arrangement of carbon atoms in graphite? An allotrope, or particular crystalline form, of carbon. The arrangement of carbon atoms in graphite is considerably different from that in diamond. In graphite, each carbon atom is covalently bonded to three other carbon atoms.
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- Graphite is a naturally-occurring form of crystalline carbon. It is a native element mineral found in metamorphic and igneous rocks. Graphite is a mineral of extremes.It is extremely soft, cleaves with very light pressure and has a very low specific gravity.hat remains is a nearly pure carbon material that crystallizes into mineral graphite. This graphite occurs in seams that correspond to the original layer of coal. When mined the material is known as amorphous graphite. The word amorphous is actually incorrect in this usage as it does have a crystalline structure.
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"Graphene ""Decorated"" With Lithium Becomes a Superconductor" An international research team from Canada and Germany has been able to demonstrate that graphene can be made to behave as a superconductor when it’s doped with lithium atoms. The researchers believe that this new property could lead to a new generation of superconducting nanoscale devices.
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- Graphene is transparent, flexible, very strong, and has already been used to create fast transistors. But, it is the very nature of graphene that might be cause for concern: thin and lightweight, yet tough and intractable particles are notoriously worrisome in terms of the detrimental effects they can have on our health, particularly when breathed in.
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Graphene It can be considered as an indefinitely large aromatic molecule, the ultimate case of the family of flat polycyclic aromatic hydrocarbons. Play media Graphene and its band structure and Dirac cones, effect of a grid on doping Graphene has many unusual properties. It is about 200 times stronger than the strongest steel. It efficiently conducts heat and electricity and is nearly transparent. Graphene shows a large and nonlinear diamagnetism, greater than graphite and can be levitated by neodymium magnets.
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Definitions and Examples A graph G = (V, E) consists of a (finite) set denoted by V, or by V(G) if one wishes to make clear which graph is under consideration, and a collection E, or E(G), of unordered pairs {u, v} of distinct elements from V. Each element of V is called a vertex or a point or a node, and each element of E is called an edge or a line or a link.
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Graphene Graphene is the only form of carbon (or solid material) in which every atom is available for chemical reaction from two sides (due to the 2D structure). Atoms at the edges of a graphene sheet have special chemical reactivity. Graphene has the highest ratio of edge atoms of any allotrope.
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Metallic, Ionic and Covalent Solids 1 In chemistry, graphite is an allotrope of carbon. 2  An allotrope is a different form of the same element and they have different structures…. 3  The Periodic Table of Elements Life is sustained by a number of chemical elements. Graphite is a type of mineral which is most known for its use in pencils. Graphite is carbon arranged in a very different way to how it is arranged in diamond.
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What are fullerenes used for?   A fullerene is a form of Carbon molecule that is neither diamond nor graphite. Fullerene molecules consist of 60 or more Carbon atoms, the smallest fullerene has no less … than 60 carbon atoms (C60) and is called Buckminsterfullerene.ullerene molecules consist of 60 or more Carbon atoms, the smallest fullerene has no less … than 60 carbon atoms (C60) and is called Buckminsterfullerene.
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Graphene Graphene is the only form of carbon (or solid material) in which every atom is available for chemical reaction from two sides (due to the 2D structure). Atoms at the edges of a graphene sheet have special chemical reactivity.Graphene has the highest ratio of edge atoms of any allotrope.t is quite likely that graphene was unwittingly produced in small quantities for centuries through the use of pencils and other similar applications of graphite, but it was first measurably produced and isolated in the lab in 2003.
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- Graphene is an allotrope (form) of carbon consisting of a single layer of carbon atoms arranged in an hexagonal lattice. It is the basic structural element of many other allotropes of carbon, such as graphite, charcoal, carbon nanotubes and fullerenes.
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Graph Theory/Definitions V is the vertex set whose elements are the vertices, or nodes of the graph. This set is often denoted V ( G ) {\displaystyle V(G)} or just V {\displaystyle V} . E is the edge set whose elements are the edges, or connections between vertices, of the graph.
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GrapheneâIonic Liquid Based Hybrid Nanomaterials as Novel Lubricant for Low Friction and Wear Graphene–Ionic Liquid Based Hybrid Nanomaterials as Novel Lubricant for Low Friction and Wear Varsha Khare *, Minh-Quan Pham, Nitee Kumari, Hae-Sung Yoon, Chung-Soo Kim, Jae-IL Park, and Sung-Hoon Ahn *
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Graphene - The Strongest Material in the World Please try again later. A study from Columbia University has shown that graphene, a single atomic layer of carbon in a honeycomb lattice pattern, is the strongest material in the world. Graphene might be used in the future for flexible electronic devices like a roll up television screen or smartphone.
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Phene A phene is an individual genetically determined characteristic or trait which can be possessed by an organism, such as eye colour, height, behavior, tooth shape or any other observable characteristic.
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Graphite Graphite /ˈɡraefaɪt/ , ˈɡræfaɪt archaically referred to As, plumbago is a crystalline form of, carbon a, semimetal a native element, mineral and one of the allotropes of. carbon process to make synthetic graphite was invented by Edward Goodrich Acheson (1856–1931). In the mid-1890s, Acheson discovered that overheating carborundum, which he is also credited with discovering, produced almost pure graphite.
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-   Graphite is a type of mineral which is most known for its use in pencils. Graphite is carbon arranged in a very different way to how it is arranged in diamond.   …   Pencils made out of the mineral graphite.
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graph (graph theory) An ordered pair , where is a set of elements called vertices (nodes) and is a set of pairs of elements of , called edges; informally, a set of vertices together with a set edges that join these vertices.
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Definition of 'grapheme' Definition of 'grapheme'. Word Frequency. grapheme (ˈɡræfiːm ) noun. linguistics. one of a set of orthographic symbols (letters or combinations of letters) in a given language that serve to distinguish one word from another and usually correspond to or represent phonemes, e.g. the f in fun, the ph in phantom, and the gh in laugh. Derived forms.
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Graphite Graphite is a naturally-occurring form of crystalline carbon. It is a native element mineral found in metamorphic and igneous rocks. Graphite is a mineral of extremes. It is extremely soft, cleaves with very light pressure and has a very low specific gravity.