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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