The streams of polymer stock solution and diluting solvent were converged at the Y mixer (P-514, Adelab Scientific), and adjusted the concentration of the polymer stream to the desired value, following the inputs given by the script. Then, the diluted polymer solution stream coming out of Y mixer and milliQ water streams were mixed using a micromixer (U-466, Adelab Scientific) where the nanoparticles were synthesized. The micromixer consisted of a static mixing tee ensuring a good mixing of both inlet flows. The outlet flow carrying nanoparticles were passed to the cuvette inside the DLS instrument for analysis. A union was used in between micromixer and flow cuvette to facilitate the joining of PFA tubing of 0.75 mm I.D. and 1/16" O.D. with the inlet tubing received with flow cuvette having 1.9 mm O.D. and 1.1 mm I.D.