Fig. 2
Size determination of TiO2 particles. a Food- and pharmaceutical-grade anatase TiO2 particles were suspended in distilled water with 0.5% BSA at a concentration of 1 mg/mL. The particle suspension was analysed with transmission electron microscopy at 80 kV. TiO2 particle diameters were measured with image analysis software. The distribution of the particle diameters, grouped in sizes of 25 nm, is shown as a relative frequency histogram, n = 133. b Food- and pharmaceutical-grade anatase TiO2 particles were suspended in RPMI 1640 medium with 10% FBS and 1% penicillin-streptomycin at a concentration of 1 mg/mL. TiO2 particle sizes were determined with nanoparticle tracking analysis, and the size distribution of the particles is plotted as a line graph. Data represent mean ± SD from three independent experiments