Fig. 2. The hydrodynamic size (A) and zeta potential (B) distribution of XFM19 (pristine MWCNT) and XFM21 (carboxylated MWCNT) with or without pre-incubation with BSA. A total of 640 μg mL⁻¹ XFM19 or XFM21 was incubated with Milli-Q water or 5% BSA for 30 min, and then diluted to 16 μg mL⁻¹ XFM19 or XFM21 with or without the presence of 0.125% BSA. Data are representative of three measurements.