The Mo3d spectra (Figure 1D) shows three characteristic peaks at 228.9 eV, 232.1 eV, and 226 eV, corresponding to Mo 3d5/2, Mo 3d3/2, and S2s of MoS2 phase. The XPS spectra for S2p (Figure 1E) shows the S2p3/2 high-intensity peak at 161.3 eV, which is because of the ...