Figure 4

(a) TGA test of the exfoliated 2H-MoS₂ sheets (black line); differential weight loss (%/dT, red dashed lines) is shown as a function of temperature. (b) XPS spectrum showing the peak regions of Mo 3d and S 2s core level for the exfoliated 2H-MoS₂ sheets. (c) S 2p core level of the XPS spectrum for the exfoliated 2H-MoS₂ sheets. The samples were calibrated using the Au 4f_5/2 line at 84.0 eV as a reference. After Shirley background subtraction, the peaks were fitted with Gaussian curve fitting. The Mo 3d and S 2p were deconvoluted to exhibit the 2H and 1T contributions, shown as red and green lines, respectively.