Fig. 3
The variations in Zeta potentials (A) and particle sizes (B) of ML-E-A and ML-A-E vs time under pH 7.4 and 5.5, respectively. Error bars denote the standard deviations. TEM images of ML-E-A and ML-A-E obtained under pH 7.4 and 5.5 (C). The morphology changes of ML-E-A and ML-A-E under pH 7.4 and 5.5 with the time (D). Scale bars = 100 nm. N = 3 for all observations