Figure 12.

Schematic setup of the continuous flow. Flow regime for SPION synthesis with a three-channel syringe pump and with a four-channel X-shaped PEEK mixer. To prevent agglomeration clogging, water was added to the reactants from inlet channel C3 via syringe 1 (S1), while the base (NH₄OH) and the iron precursor (FeCl₃ and FeCl₂) with the polymer coating agents (CMD or D70) were pumped with syringes 2 (S2) and 3 (S3) into the inlet of the channels C1 and C2. The flow rate for every used channel was 300 μL/min. To guarantee an undisturbed transport of the reactants inside the tubes, microfluidic tube connectors were used.