Fig. 10
λQext/a (solid) and λQabs/a (dashed), for 100, 30 and 10 nm radius particles, as a function of wavelength, for all of the considered band gap materials (see Table 1). At λ = 2 μm, Eg decreases from 2.67 eV (lower purple line) to − 0.1 to 0.25 eV (the four upper grey and black lines). The vertical grey line marks the position of the UV extinction bump at 217 nm.
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