Zinc oxide nanocrystals (ZnO NCs) prepared in rigorously oxygen-free conditions do not emit in the visible until they are exposed to oxygen. A spectrophotometric O 2 titration of oxygen-free ZnO NC allows for the determination of the stoichiometry, kinetics, and luminescent properties of this critical interaction, best explained in terms of a two-site surface model.
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Bohle et al. (2007) studied this question.
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