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Chemical processes use more copper nanoparticles than stars in the sky – but what is their optimal size?

Copper particles just a few nanometres in diameter are an extremely important component in catalysts for chemical processes. These processes require immense quantities of these copper nanoparticles – more than the number of stars in the sky. It is thus vital that the raw materials are used as efficiently as possible. So the question for researchers is how big these particles should be in order to function optimally.
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