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Experimental study demonstrates intra-particle metal ripening on pyramid-shaped nanocrystals, indicating Fermi level shifts alter photocatalytic activity.
We report ripening of metal particles anchored on pyramid-shaped heterostructure nanocrystals. The 'intra-particle' ripening results in a large metal tip at one corner with the other three tips vanishing. Investigation reveals that the ripening and core/shell formation affects photocatalytic activities via the Fermi level change.
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Kim et al. (2013) studied this question.
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