All the scattering experiments were performed using a PEEK flow-through cell coupled with a pump setup. 50 mL of a 0.1 M DAP solution was stirred (500 rpm) in a 200 mL glass reactor. The content of the reactor was continuously circulated through a borosilicate glass capillary cell (ID = 1.498 mm) using a peristaltic pump (Longer BT100-2J) at 300 mL/min. A schematics and actual photographs of the experimental setup can be found in the SI (Supplementary Material: Fig. ). The dead volume of tubing was ~2 mL. 50 mL of a MgCl 2 solution was injected into the reactor containing DAP at 300 mL/min using a second peristaltic pump with a remote control. The injection of the solution took 10 s to complete.