Fig. 2

Magnifications of AFM morphology result respectively regarding a NIR and b–e IR1-IR4 and the corresponding drawings of morphology dynamics for (a′) NIR and (b′–e′) IR1-IR4, for a convenient discuss, droplets with the typical morphology property of each magnification are carefully selected and marked by yellow dotted rectangles; f Normalized density and equivalent volume results of the droplets in Fig. 1a/NIR, Fig. 1b/IR1, Fig. 1c/IR2, Fig. 1d/IR3, Fig. 1e/IR4 and Fig. 1f/IR5