Morphological and Physicochemical Characterization of Agglomerates of Titanium Dioxide Nanoparticles in Cell Culture Media

Figure 4

Titration ζ curves for each type of TiO₂ NP (a) spheres, (b) E171 NP, and (c) belts, in each medium used (H₂O, FBS, F12K, and F12K + FBS). The pHiep (isoelectric point) in water solutions were around 2 in the three cases, (a) the pHiep for spheres suspended in media were around pH 5-6, (b) the pHiep for E171 suspended in all media (except water) were around pH 4, and (c) the pHiep for belts suspended in all media (except water) were around 4-5.

(a)

(b)

(c)