Figure 1: WS2 characterization.
From: Surface enhanced Raman scattering of monolayer MX2 with metallic nano particles
(a) RHEED patterns of a sapphire substrate after annealing with oxygen for 2 hours. (b) RHEED pattern of monolayer WO3 grown on a sapphire substrate. (c) X-ray photoemission spectroscopy compositional analysis of monolayer WO3 grown on a sapphire substrate. X-ray photoemission spectroscopy compositional analysis for the S (d) and W (e) peaks of monolayer WS2 grown on a sapphire substrate. (f) PL spectrum of monolayer WS2 grown on sapphire substrate.
