Abstract
We demonstrate the model-free determination of the size-distribution function f( R) of CuCl nanocrystals in NaCl by analyzing the absorption spectrum of the Z 3 exciton of CuCl. It is proved that the maximum of the exciton absorption coincides with the mean radius R̄. The number of nanocrystals with small sizes is much larger than predicted for Ostwald ripening. Thus, in addition to ripening processes as described by the popular Lifshitz–Slyozov–Wagner growth theory other mechanisms occur during cluster growth.
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