2.3.1. Particle Size and ζ-Potential

Samples were diluted by 200 folds with distilled water and measured at 25 ◦C and analyzed on a NanoBrook Omini particle size analyzer (Brookhaven Instrument, New York, NY, USA) at a scattering angle of 90◦. NNLS function was used to acquire the size distribution, while phase analysis light scattering (PALS) was employed to estimate the ζ-potential. Samples were prepared in triplicates for each measurement.
