Fig. 2
From: Batch production of 6-inch uniform monolayer molybdenum disulfide catalyzed by sodium in glass
Comparison of MoS2 synthesized by a point-to-face and face-to-face metal-precursor supply routes. a, c Photographs of MoS2 growth on 6-inch soda-lime glass using a MoO3 powder and c Mo foil as precursors. The gas-flow direction was from left to right in both cases. b, d Corresponding OM images of MoS2 synthesized using b MoO3 powder and d Mo foil as precursors, at the points labeled A1, B1, and C1 in a and A2, C2, and E2 in c (with the different locations marked by colored letters; scale bars: 100 µm). e, f Corresponding Raman spectra of MoS2 synthesized with the MoO3 powder and the Mo foil precursors, respectively, at the points labeled A–E in a and c. g, h Color-coded images of the typical Raman modes for the samples shown in a and c, respectively, collected from 70 positions (with an interval of 2 mm along the horizontal direction)
