Figure 2. Electron microscope images of MPs.
(a–c) SEM images of MP-0.8 (scale bar: a = 100 μm, b = 10 μm, and c = 5 μm). (d–f) TEM images of MP-0.8 (scale bar: d = 500 nm, e = 1 μm, and f = 1 μm). SEM images of (g) MP-1.0 (scale bar = 100 μm), (h) MP-1.2 (scale bar = 20 μm), and (i) MP-1.5 (scale bar = 10 μm).