Figure 2

Particle size and transmission electron microscopy (TEM) images of MNEO and MTEO at 25 mg/mL. (A) The particle size distribution of MNEO was generated by particle size and its corresponding strength. (B) The particle size distribution of MTEO. (C) In the TEM image of MNEO, the acceleration voltage was 100 keV, and the morphology of MNEO was observed at a rate of 100,000 X. (D) In the TEM image of MTEO, the acceleration voltage was 100 keV, and the morphology of MNEO was observed at a rate of 50,000 X.