(rutile) particle size in dispersions with different TiO
concentrations. TiO2 (rutile) dispersed in distilled water at concentrations ranging from 0.002 to 2 mg/ml was sonicated and 1.5 mg/ml HSA was given to the dispersion before adding concentrated PBS to the dispersion. TiO2 (rutile) dispersions at a concentration of 2 mg/ml were also prepared in the same way but with addition of 10 times more (15 mg/ml) HSA (hatched bar). The average hydrodynamic diameter of the particles was measured. The experiments were carried out in triplicates (*, p < 0.05 vs. dispersion with 2 mg/ml TiO2 (rutile)).