Figure 3 Raman
spectra of MoS 2 : (a) Comparison of the peak difference
of MoS 2  grown at different temperatures. (b) OM image of
a MoS 2  flake grown at 780 °C. (c, d) Raman intensity
mapping of the E 1 2g  and A 1g  vibrational
modes, respectively.