Fig. 2: The evolution behavior of hollow polystyrene microspheres in the water-ethanol mixture (water: ethanol (v:v) = 1:5).
a 30 min, b 1 h, c 2 h, d 4 h, e 6 h, f 8 h, g 12 h, h 24 h, i the effect of the reaction time on the hollow PS microsphere size
