2D peakBoron nitridegrapheneRaman spectroscopytungsten diselenideThe Raman 2D line of graphene is widely used for device characterization and during device fabrication as it contains valuable information on, e.g., the direction and magnitude of mechanical strain and doping. Here, we present systematic ...
The Raman 2D line of graphene is widely used for device characterization and during device fabrication as it contains valuable information on, e.g., the direction and magnitude of mechanical strain and doping. Here, we present systematic asymmetries in the 2D line shape of exfoliated graphene and...
We found that the surface enhanced Raman spectroscopy of graphene was increased approximately 7-fold by near-fields of plasmonic Ag nanoparticles and the enhancement factor of graphene G peak increased with the particle size. Meanwhile, the LSP resonances of Ag nanoparticles exhibit a 10nm redshift ...
40. When applying strain, the Raman shift of the 2D peak versus G peak is moving along the iso-doping line (slope of 2.45, the strain sensitivity is 57 cm−1/%41) from the point of neutral and unstrained graphene, while when applying doping, the shift is along the iso-strain ...
32 cm−1 and the intensity ratio I(2D)/I(G) (Raman 2D-peak to G-peak) is ~2, which are typical values for CVD graphene monolayers26. However, a slight increase of the intensity ratio I(D)/I(G) (Raman D-peak to G-peak) in the Gr/PMMA nanolaminates indicates that some ...
Analysis of the Raman G and 2D peak positions and relative intensities reveal that the graphene is electrically intrinsic where it is suspended over the MRR but is moderately hole-doped where it sits on top of the waveguide structure. This is suggestive of Fermi level 'pinning' at the ...
Finally, the Raman peak at approximately 1347 cm(-1) for TBG with a large twist angle was assigned to the D-like peak, although it has similar excitation energy dependence of frequency as the defect-induced D peak. Theoretical calculation further confirmed that vacancy-like defect is not ...
Raman spectroscopy study reveals that concentration of expanded graphite in organic solvent up to 13 mg/ml will gives the full width half maxima of 2D peak is around 67 cm, which is comparable to five–six layer of graphene in FLG. The FLG based polymer based composites exhibit very high ...
The D band intensity of Janus graphene in the Raman spectrum was recorded as a 2D map (Fig. 2c). The homogenous colour distribution in a large area scan suggests the uniformity of functionalisation in Janus graphene within the spatial resolution of Raman instruments (~1 μm). In ...
The small Raman 2D peak upshift of about 1 cm−1 indicates that rosin-transferred graphene is slightly doped48,49. In contrast, as shown in Fig. 4c,f, the PMMA-transferred graphene shows similar XPS spectra to PMMA, a visible D peak and large 2D peak upshift of about 13 cm−1...