Fig. 3

Aggregation profile evaluation for NP stock dispersions. Average hydrodynamic size profiles of 25 mM ZnO stock dispersions (pH = 7.3) for a 24-h time period. a nZnO in various biologically relevant solutions. b nZnO, nZnO – FBS^dried, nZnO – FBS^washed, and nZnO – FBS stock dispersions in PBS and c nZnO, nZnO – FBS^dried, nZnO – FBS^washed, and nZnO – FBS stock dispersions in nanopure water