Table 1 Characterization of 15-nm, 30-nm and micro-sized SiO2
From: SiO2 nanoparticles induce cytotoxicity and protein expression alteration in HaCaT cells
|  | Size and distribution nm (mean ± SD) | Zeta potential (mV) | Crystalline structure |
|---|---|---|---|
15-nm SiO2 | 13.0 ± 3.8 nm | -14.37 | Amorphous |
30-nm SiO2 | 20.1 ± 3.5 nm (50.5%); 51.3 ± 9.2 nm (49.5%) | -63.31 | Amorphous |
Micro-sized SiO2 | 365.1 ± 79.5 nm | -59.7 | Amorphous |