Figure 2: Extinction, absorbance and scattering spectra.

(a) Wavelength dependence of optical extinction coefficient, ε, for fractions F1, F3, F4 and F6. NB ε is defined by T=10^−εCl where T is the transmittance, C is the MoS₂ concentration and l the cell length. ε can be split into contributions from absorption, α, and scattering, σ, such that ε=α+σ. (b,c) Wavelength dependence of (b) optical absorption coefficient, α, and (c) optical scattering coefficient, σ. (d) A-exciton position measured from the extinction spectra (Fig. 2a) plotted versus that measured from the absorption spectra (Fig. 2b) for fractions F1–F6. (e) Ext_B/Ext₃₄₅ (measured from the extinction spectra, Fig. 2a) plotted versus Abs_B/Abs₃₄₅ (measured from the absorption spectra, Fig. 2b) for fractions F1–F6.