منابع مشابه
Raman Radiation Patterns of Graphene
We report the angular distribution of the G and 2D Raman scattering from graphene on glass by detecting back focal plane patterns. The G Raman emission can be described by a superposition of two incoherent orthogonal point dipoles oriented in the graphene plane. Due to double resonant Raman scattering, the 2D emission can be represented by the sum of either three incoherent dipoles oriented 120...
متن کاملRaman spectrum of graphene and graphene layers.
Graphene is the two-dimensional building block for carbon allotropes of every other dimensionality. We show that its electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers. The D peak second order changes in shape, width, and position for an increasing number of layers, reflecting the change in the electron bands via a double resonant Raman process...
متن کاملRaman spectroscopy of graphene edges.
Graphene edges are of particular interest since their orientation determines the electronic properties. Here we present a detailed Raman investigation of graphene flakes with edges oriented at different crystallographic directions. We also develop a real space theory for Raman scattering to analyze the general case of disordered edges. The position, width, and intensity of G and D peaks are stu...
متن کاملTheory of Graphene Raman Scattering.
Raman scattering plays a key role in unraveling the quantum dynamics of graphene, perhaps the most promising material of recent times. It is crucial to correctly interpret the meaning of the spectra. It is therefore very surprising that the widely accepted understanding of Raman scattering, i.e., Kramers-Heisenberg-Dirac theory, has never been applied to graphene. Doing so here, a remarkable me...
متن کاملRaman spectroscopy study of nano sheets of graphene and measurement of their resistivity
Graphene is a promising candidate for future high-speed electronics applications. It is a thin layer of pure carbon in which every atom is available for chemical reaction from two sides (due to the 2D structure). This is the only form of carbon (or solid material) with this characteristic feature. Graphene oxide (GO) was synthesized through the oxidation of graphite using the Hummer’s method, i...
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ژورنال
عنوان ژورنال: ACS Nano
سال: 2015
ISSN: 1936-0851,1936-086X
DOI: 10.1021/acsnano.5b06631