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The electronic properties of graphene are significantly influenced by the supporting substrate. [59] [60] The Si(100)/H surface does not perturb graphene's electronic properties, whereas the interaction between it and the clean Si(100) surface changes its electronic states significantly. This effect results from the covalent bonding between C ...
So far, the graphene plasmonic effects have been demonstrated for different applications ranging from light modulation [15] [16] to biological/chemical sensing. [17] [18] [19] High-speed photodetection at 10 Gbit/s based on graphene and 20-fold improvement on the detection efficiency through graphene/gold nanostructure were also reported. [20]
Bilayer graphene displays the anomalous quantum Hall effect, a tunable band gap [3] and potential for excitonic condensation. [4] Bilayer graphene typically can be found either in twisted configurations where the two layers are rotated relative to each other or graphitic Bernal stacked configurations where half the atoms in one layer lie atop half the atoms in the other. [5]
In addition, it is known that when single-layer graphene is supported on an amorphous material, the thermal conductivity is reduced to about 500 – 600 W⋅m −1 ⋅K −1 at room temperature as a result of scattering of graphene lattice waves by the substrate, [172] [173] and can be even lower for few-layer graphene encased in amorphous ...
Indeed, Fermi level of a molecular graphene is directly linked to its lattice spacing. [1] Graphene is a lattice that can be mimicked in artificial lattices. Multiple geometries for artificial lattices has been researched and created. Some of those geometries are : Graphene [1] Lieb lattices [1] Sierpiński triangle [1] Penrose tiling [4 ...
The quantum capacitance of graphene is relevant to understanding and modeling gated graphene. [4] It is also relevant for carbon nanotubes. [5] In modeling and analyzing dye-sensitized solar cells, the quantum capacitance of the sintered TiO 2 nanoparticle electrode is an important effect, as described in the work of Juan Bisquert. [2] [6] [7]
In 2018 they verified that superconductivity existed in bilayer graphene where one layer was rotated by an angle of 1.1° relative to the other, forming a moiré pattern, at a temperature of 1.7 K (−271.45 °C; −456.61 °F). [2] [16] [17] They created two bilayer devices that acted as an insulator instead of a conductor without a magnetic ...
In physics, Dirac cones are features that occur in some electronic band structures that describe unusual electron transport properties of materials like graphene and topological insulators. [ 1 ] [ 2 ] [ 3 ] In these materials, at energies near the Fermi level , the valence band and conduction band take the shape of the upper and lower halves ...