Raman scattering of single crystal Cu2MoS4 nanosheet

Abstract

Polarized Raman spectra were recorded under parallel and perpendicular configurations in back scattering geometry for a single crystal Cu2MoS4 nanosheet of c-plane (001) faced orientation. The angular dependence of Raman peaks intensity for different phonon modes were studied by rotating from 0 to 180 degree around the c-axis of the ternary layered crystal. In combination with the theoretical calculations, the experimentally observed Raman peaks were assigned to four active Raman modes accordingly.

Cu2MoS4 Nanotubes as a Cathode Material for Rechargeable Magnesium‐ion Battery

“…The powder XRD analysis further confirms the generation of pure I‐phase Cu 2 MoS 4 wherein patterns of impurity phases like Cu 2 O, MoO 3 and MoS 2 are not found (Figure d) . Raman analysis using a green laser 532 nm excitation reveals characteristic vibration modes within the Cu 2 MoS 4 molecule (Figure S4) . The chemical composition of Cu 2 MoS 4 was further evidenced by XPS analysis.…”

Superior Electrical Conductivity in Hydrogenated Layered Ternary Chalcogenide Nanosheets for Flexible All‐Solid‐State Supercapacitors

“…Raman spectra give further evidence that there are no structural transformations during the lithium intercalation assisted exfoliation. As can be seen from Figure 2b,Raman spectra of both bulk Cu 2 WS 4 and asexfoliated nanosheets show three prominent peaks (A 1 mode, B 1 mode,a nd Em ode) [24] with similar Raman shifts,t hus indicating that the exfoliated nanosheets retain the structure of the bulk sample.Compared to the bulk sample,the Emode of exfoliated nanosheets located at 433.5 cm À1 is shifted to lower wavenumber by 17 cm À1 .T he shift of Raman modes between bulk and thin nanosheets is acommon phenomenon, which can be ascribed to the phonon confinement effect. [7] Thep resence of hydrogen doping in the exfoliated nanosheets could be clearly identified by 1 Hs olid-state NMR spectroscopy and X-ray photoelectron spectroscopy (XPS).…”

Superior Electrical Conductivity in Hydrogenated Layered Ternary Chalcogenide Nanosheets for Flexible All‐Solid‐State Supercapacitors

“…Raman spectra give further evidence that there are no structural transformations during the lithium intercalation assisted exfoliation. As can be seen from Figure b, Raman spectra of both bulk Cu 2 WS 4 and as‐exfoliated nanosheets show three prominent peaks (A 1 mode, B 1 mode, and E mode) with similar Raman shifts, thus indicating that the exfoliated nanosheets retain the structure of the bulk sample. Compared to the bulk sample, the E mode of exfoliated nanosheets located at 433.5 cm −1 is shifted to lower wavenumber by 17 cm −1 .…”