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Table 1 Characterization of TiO 2 , ZnO, and SiO 2 nanoparticles in Milli-Q water solutions

From: A comparison of conventional methods for the quantification of bacterial cells after exposure to metal oxide nanoparticles

Physical Parameters ZnO TiO2 SiO2
Primary size (nm) 14.0 ± 4.9 19.7 ± 5.7 17.4 ± 5.1
Primary size range(nm) 6.3 – 30.5 10.2 - 31.2 8.0 – 27.9
Hydrodynamic size (nm) 2738.3 ± 303.3 2308.3 ± 159.1 915.0 ± 35.8
Shape spherical spherical spherical
Agglomerate in solution Yes Yes Yes
Zeta potential ζ (mV) 17.6 ± 0.7 27.2 ± 3.1 −5.7 ± 0.4