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Surfactants clearly influence on the morphology of crystals. I cannot understand, however, the formation mechanism suggested by authors. Is size of the crystals in scheme1a larger than that in scheme 1b. Why does final products decrease? Authors describe that final crystals were formed by self-assembly of nanorods, while indicate that Ostwald ripening process may play a key role for the formation. According to scheme 1, the pompon-like spheres are secondary particles. Although Ostwald ripening promotes growth of primary particles, not self-assembly. Authors should clarify a relationship between Ostwald ripening and self-assembly process.
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