Raman spectroscopy of graphene nanoribbons synthesized by longitudinal unzipping of multiwall carbon nanotubes

Sp2 carbon embedded in Al-6061 and Al-7075 alloys in the form of crystalline graphene nanoribbons

“…These features, similar to previous studies [29,34] indicate the presence of graphene-like nanoribbons (GNR) supporting the TEM and EELS studies in Figure 1, Figure 2 and Figure 5. The overlapping of G and D peaks in the Raman spectra also indicates the presence of graphene oxide [35] in agreement with the observation of oxygen in the EELS spectrum imaging ( Figure 5) and XPS ( Figure 10 and Figure 11) from these samples. The Raman laser spot used to obtain the data was 700 nm in diameter whereas the ribbons' widths are much narrower in the tens of nm range.…”

WITHDRAWN: Corrosion resistant fluorine-doped graphene nanoribbons for an highly durable PEMFC: combined experiment and ab-initio studies

“…Improvement of the electrochemically active surface area (ECSA) has been focused on by developing support materials with large speci c surface areas, which is advantageous for the uniform dispersion of Pt nanoparticles. These reasons motivated this study to develop graphene nanoribbons (GNRs) [17][18][19] as support materials because they have a large speci c surface area and hydrophilic surface property, which is advantageous for the homogeneous dispersion of small Pt nanoparticles (NPs). Furthermore, GNRs have abundant edge sites that are advantageous for controlling the properties of GNRO by selective heteroatom doping with respect to the applications.…”

Enhanced electrochemical activities of morphologically tuned MnFe2O4 nanoneedles and nanoparticles integrated on reduced graphene oxide for highly efficient supercapacitor electrodes

“…The intense D band in the GO spectra is associated with the cleavage of sp 2 bonds to generate more sp 3 bonds. 34,35 The ratio of I D /I G is deduced to be 1.45 and 1.46 for M-np/rGO and M-nr/rGO nanocomposites respectively, compared to graphene oxide (0.97) suggesting the reduction of GO to rGO. The ratio of the D band to G band intensity can also be used to determine the inplane crystallite size (L a )of the graphene oxide layers as shown in Fig 2C using of atomic content of Mn and Fe is about 1:2 and the carbon content is predominantly from graphene exposed on the surface.…”