Horizontal to transition of MoS2 grown by CVD on Horizontal to Vertical Transition of MoS2 grown by CVD on Mo studied by Spectroscopic EllipsometryMo studied by Spectroscopic Ellipsometry verti

Dresde

Congreso; 2018 Graphene conference; 2018

we investigate structural transitions as a function of temperature for CVD grown MoS 2 on specular polished molybdenum surfaces exposed to sulphur gas. Figure 1a show that the thickness of the MoS 2 films obtained from the elllipsometric spectra (inset) have an abrupt transition around 800 o C in agreement with the topography of SEM images which show a change from smooth films (Fig.1b) to structures with vertically aligned layers (Fig. 1c).