Effect of surface properties of silica nanoparticles on their cytotoxicity and cellular distribution in murine macrophages

Table 1 Average particle size and zeta potential of unmodified and modified nanosilica

	nSP70	nSP70-N	nSP70-C
Modification substance	-	NH₂	COOH
Mean particle size in water (nm)	64.2 ± 0.6	72.7 ± 1.3	76.2 ± 1.6
Mean zeta potential (mV)	-42.1 ± 0.6	-29.8 ± 0.5	-72.0 ± 1.9