Table 1.

Physical diameter and ζ potential of the silica nanoparticles. Measurements done by small-angle X-ray scattering (in pure water) and electrophoretic light scattering (in phosphate buffer 0.1 mol·L⁻¹, pH 7), respectively.

	Physical Diameter (nm)	Curvature (nm−1)	ζ Potential (mV)
S10	8.3 ± 1.2	0.230	−4.6 ± 0.8
S30	33.0 ± 4.3	0.061	−20.1 ± 1.0
S80	78.0 ± 8.6	0.026	−22.9 ± 0.9