The NPs size was assessed by dynamic light scattering (DLS) using Zetasizer Nano Malvern Zen 3600 equipped with He-Ne laser (633 nm, 4 mW). The measurements were performed at 25 ± 0.1 °C with a 90° detection angle. Particle size was measured after the nanoprecipitation process and after purification steps to verify dispersion stability.