Raman study on the g mode of graphene for determination of edge orientation.

  title={Raman study on the g mode of graphene for determination of edge orientation.},
  author={Chunxiao Cong and Ting Yu and Haomin Wang},
  journal={ACS nano},
  volume={4 6},
We report a confocal Raman study on edges of single-layer graphene. It is found that edge orientations could be identified by G mode in addition to D mode. We observe that G mode at the edges of single-layer graphene exhibits polar behaviors and different edges such as zigzag- or armchair-dominated responses differently than the polarization of the incident laser. Moreover, G mode shows stiffening at zigzag-dominated edges, while it is softened at armchair-dominated ones. Our observations are… Expand

Figures and Topics from this paper

Observation of Raman g-peak split for graphene nanoribbons with hydrogen-terminated zigzag edges.
This work offers the first direct experimental evidence to confirm the validity of predicted Raman scattering of GNRs, and the results are in good agreement with previous theoretical predictions. Expand
Observation of phonon anomaly at the armchair edge of single-layer graphene in air.
This study proves that the phonon anomaly can occur at the armchair edge as predicted by Sasaki et al. (J. Phys. Soc. Jpn. 2010, 79, 044603), and demonstrates thatThe phonon property of an edge or center site in single-layer graphene is very sensitive to its local carrier concentration. Expand
Revealing anisotropic strain in exfoliated graphene by polarized Raman spectroscopy.
A method to quantitatively analyze the positions, widths, intensities, and polarization dependences of sub-peaks of graphene films is developed and quantitatively reveals local strain, which changes with the detected area of a graphene film. Expand
Raman spectroscopy as a versatile tool for studying the properties of graphene.
The state of the art, future directions and open questions in Raman spectroscopy of graphene are reviewed, and essential physical processes whose importance has only recently been recognized are described. Expand
Evolution of Raman G and G′ (2D) modes in folded graphene layers
Bernal- and non-Bernal-stacked graphene layers have been systematically studied by Raman imaging and spectroscopy. Two dominant Raman modes, G and G' (or 2D) of folded graphene layers exhibit threeExpand
Casimir effect demonstrated by Raman spectroscopy on trilayer graphene intercalated into stiff layered structures of surfactant
Polarized Raman scattering studies on stiff layered structure of surfactant intercalated with trilayer graphene were performed at different intensities and excitation wavelengths. The D and 2D RamanExpand
Effects of edge on graphene plasmons as revealed by infrared nanoimaging
This study suggests that graphene edges should be separated by an effective working distance to avoid the overlapping of localized plasmon modes, which is very important for the design of graphene-based plAsmonic circuits and devices. Expand
Characterization of hydrogen plasma defined graphene edges
We investigate the quality of hydrogen plasma defined graphene edges by Raman spectroscopy, atomic resolution AFM and low temperature electronic transport measurements. The exposure of graphiteExpand
Scanning probe spectroscopy of graphene nanostructures
The aim of the present thesis is to shed some light on different properties of graphene, a single atomic layer of carbon atoms. Since the discovery of an easy way to fabricate graphene from graphiteExpand
Raman spectroscopy of graphene-based materials and its applications in related devices.
The essential Raman scattering processes of the entire first- and second-order modes in intrinsic graphene are described and the extensive capabilities of Raman spectroscopy for the investigation of the fundamental properties of graphene under external perturbations are described. Expand


Raman spectroscopy of graphene edges.
A detailed Raman investigation of graphene flakes with edges oriented at different crystallographic directions is presented and a real space theory for Raman scattering is developed to analyze the general case of disordered edges. Expand
Identifying the Orientation of Edge of Graphene Using G band Raman Spectra
The electron-phonon matrix elements relevant to the Raman intensity and Kohn anomaly of the G band are calculated by taking into account the effect of the edge of graphene. The analysis of theExpand
Uniaxial Strain in Graphene by Raman Spectroscopy: G peak splitting, Gruneisen Parameters and Sample Orientation
We uncover the constitutive relation of graphene and probe the physics of its optical phonons by studying its Raman spectrum as a function of uniaxial strain. We find that the doubly degenerate E(2g)Expand
Edge chirality determination of graphene by Raman spectroscopy
Raman imaging of single layer micromechanical cleavage graphene was carried out. The intensity of disorder-induced Raman feature (D band at ∼1350cm−1) was found to be correlated to the edgeExpand
Uniaxial strain on graphene: Raman spectroscopy study and band-gap opening.
The strained graphene provides an alternative way to experimentally tune the band gap of graphene, which would be more efficient and more controllable than other methods that are used to open the bandgap in graphene. Expand
Raman Mapping Investigation of Graphene on Transparent Flexible Substrate: The Strain Effect
We report a Raman mapping investigation of strain effects on graphene on transparent and flexible substrate. Raman mappings reveal a significant red-shift of the 2D mode with introduction of tensileExpand
Probing graphene edges via Raman scattering.
It is proposed that in the double resonance Raman scattering process the photoelectron scatters diffusely from the authors' edges, obscuring the recently proposed strong variation in the scattering from armchair versus zigzag symmetry edges based on theoretical arguments. Expand
Phonon softening and crystallographic orientation of strained graphene studied by Raman spectroscopy
Polarized Raman spectra of optical phonons in graphene monolayers under tunable uniaxial tensile stress constitutes a purely optical method for the determination of the crystallographic orientation of graphene. Expand
Kohn anomalies in graphene nanoribbons
The quantum corrections to the energies of the $\ensuremath{\Gamma}$ point optical phonon modes (Kohn anomalies) in graphene nanoribbons (NRs) are investigated. We show theoretically that theExpand
Raman spectrum of graphene and graphene layers.
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. Expand