Figure 6: Metric for WS2. | Nature Communications

Figure 6: Metric for WS2.

From: Edge and confinement effects allow in situ measurement of size and thickness of liquid-exfoliated nanosheets

Figure 6

(a) Extinction spectra, normalized to 295 nm, of surfactant exfoliated WS2 fractions after band sedimentation at 2.5k r.p.m. for 10 min. The A-exciton is labelled. (b) A-exciton wavelength plotted as a function of fraction number. (c) Extinction peak ratio, ExtA/Ext295, plotted versus fraction number. (d) Typical AFM images of deposited WS2 nanosheets (scale bar, 1 μm) and (e) height profile of the nanosheet at the top right (scale bar, 250 nm). (f) Raman and (g) PL intensity map (532 nm excitation) of the same area (scale bar, 1 μm). (h) Representative PL spectra of the nanosheet displayed in e at the centre and in the edge region.

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