Comm, distinct peaks positioned at 407 cm -1 , 381 cm -1 , and 284 cm -1 can be assigned to the A1g, E 1 2g and E1g modes which are consistent with the characteristic vibrational and stretching modes of 2H phase . Their presence and position are a confirmation of well-defined crystalline domains. Raman spectra of hydrothermally synthesized MoS2 samples also show the presence of E 1 2g and A1g modes, confirming the presence of 2H-MoS2 in these samples.