“…13,14 A further reactor type used for metal NP synthesis are segmented ow reactors, where the reaction phase is injected into the channel alongside an immiscible uid dividing the reacting agents into nearly-identical droplets. 15,16 In all these cases, the detailed modelling of the uid ow in small and complex channels is challenging and may be further complicated by the impact of the channel surface. This hampers a better understanding of the mechanism of mixing controlled Au NP formation and limits scale-up.…”