Figure 2
From: Identification of individual and few layers of WS2 using Raman Spectroscopy
(a) AFM image of a WS2 triangular island, which varies from four to one layers thick.Also Raman mappings of the same WS2 island (using 514.5 nm laser excitation): (b) intensity of the 2LA second-order mode, (c) frequency and (d) intensity of the A1g mode. (e) Line profiles along the red horizontal line in each image corresponding to height, 2LA intensity, A1g intensity and A1g peak position (ω). The Raman mappings as well as the intensity profiles refer to the maximum intensity of the peaks (not the integrated intensities).
