NIMA: 375 cm Dynamic light scattering (DLS) and zeta-potential measurements were carried out using a Zetasizer Nano ZS apparatus (Malvern Instruments Ltd., Malvern, UK) equipped with a DLS module (He-Ne laser 633 nm, max 4 mW, allowing for measuring backscattered (175°) and forward-scattered (12.8°) light). Quasi-backscattered light was used for the measurements.