Wojnicki, M.Tokarski, T.Hessel, V.Fitzner, K.Luty-Błocho, M.2020-03-172020-03-172019Chemical Engineering Journal, 2019; 382:122922-1-122922-61385-89471873-3212http://hdl.handle.net/2440/123696In this paper diffusion impact on the silver nanoparticles synthesis and their crystal structure is shown. For this purpose, comparative studies between continuous flow two-phase microdroplets systems vs. two-phase batch reactor were performed. Such two-phase configuration of the investigated system makes it possible to study the impact of mass transfer phenomenon on the nanoparticles formation process. In the case of two-phase microdroplets system, diffusion is replaced by convection, accelerated by interphase friction between water droplets and a continuous organic phase. It was concluded that under diffusion control it was possible to obtain silver nanoparticles with a hexagonal crystal structure. Moreover, for the first time using a chemical method, and diffusion rate-limiting step, the hexagonal structure 4H and 2H of Ag nanoparticles were synthesized. We suggest, that such hexagonal crystals can be applied as a smart drug delivery system, where the drug releases can be controlled by short light impulse. In effects, thermodynamically unstable 4H and 2H crystals transform to more dense-packed FCC structure.en© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.Droplets; microreactor; silver nanoparticles; DMAB; hexagonal crystal structureJournal article100000659210.1016/j.cej.2019.1229220005033812000022-s2.0-85075348004507679Hessel, V. [0000-0002-9494-1519]