Dynamic light scattering (DLS):
DLS measurements were performed using a CGS-3 light-scattering
spectrometer equipped with an LSE-5004 digital correlator (ALV, Langen,
Germany). The light source was the He-Ne laser line, 633 nm at 22mW.
Before the analysis, the samples were diluted about 1/100000 in order to
avoid counter saturation and particle interactions (Bouanani et al.,
2012).