We have fabricated a bilayer molybdenum disulphide (MoS2) transistor on boron nitride (BN) substrate and performed Raman spectroscopy and electrical measurements with this device. The characteristic Raman peaks show an upshift about 2.5 cm 1 with the layer lying on BN, and a narrower line width ...
The intensities of the peaks are enhanced at different excitation energies through resonance with different optical transitions. The A1g mode is enhanced at 1.58 and 3.82 eV, which are near the A exciton energy and the band-to-band transition between higher energy bands, respectively. The E...
The peaks corresponding to mode show a one-mode type behavior, while the peaks of mode demonstrate two-mode type behavior for the entire series of Mo1-xWxS2 crystals. These behaviors were discussed on the basis of the lattice vibrational properties of 2H-MoS2 and 2H-WS2 compounds. 展开 ...
32. for the temperature that strongest Raman scattering peaks appeared. It may just reflect the effect of different substrates and bonding between film and substrates31. In order clearly to display the shift of Raman peak position with temperature, the Raman spectra normalized brObeyendcte-ohsmce...
Figure S3 Raman spectra for a MoS2 monolayer, pure ZnO nanorods on a SiO2/Si substrate, pure ZnO nanorods on a ZnO seed layers and ZnO nanorods on a MoS2 monolayer. The energy difference (Δ) between the two MoS2 Raman peaks can be used to identify the MoS2 monolayer (~19 cm–...
A Raman spectroscopy method can quickly and accurately measure the concentration of ofloxacin in solution. This method has the advantages of accuracy and rapidity over traditional detection methods. However, the manual analysis methods for the collected Raman spectral data often ignore the nonlinear chara...
For biological samples, approximately 90% of the peaks are found in the ‘fingerprint’ spectral region, covering (\( \Delta \overset{\sim }{\nu } \)~ 500 cm−1to ~ 1800 cm−1;\( \Delta \overset{\sim }{\nu } \)is the wavenumber shift defined in the “Analysis metho...
Compared with GNRs colloid, the positions of the two absorption peaks of GNRs membrane show an obvious red-shift, moving to 792 nm and 1432 nm, respectively. And the half width of the peaks Conclusions The GNRs Janus membranes were synthesized by modified self-assembly strategy at the ...
(C peaks) due to resonance with new optically allowed electronic transitions, determined by the relative orientation of the layers. The interlayer coupling results in a Davydov splitting of the C peak in systems consisting of two equivalent graphene multilayers. This allows us to directly quantify ...
Moreover, strong coupling between the MX2 and the Ag NPs through surface plasmon excitation results in splitting of additional peak increases exponentially wthiethAl1o′ (cΓal) mode and additional peaks are manifested. The intensity of the strain, which opens another interesting window into ...