A fast redistribution of metal atoms occurs upon mixing the AgxAu38−x and Au38 nanoclusters in solution, as observed by mass spectrometry. Physical separation of AgxAu38−x and Au38 species by a dialysis membrane prohibits the metal migration, which suggests that collisions between the reacting clusters are at the origin of the observation.

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Bürgi, Thomas Salassa, Giovanni Zhang, Bei 
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