“…Different kinds of multistage methods, such as activated swelling [10,11], seeded emulsion polymerization [12], precipitation polymerization [13], template imprinting [14,15], and membrane techniques [16,17] have been developed to prepare the monodisperse porous polystyrene particles. Preparation conditions related to the porosity formation, surface modification, structure stability, and swelling homogeneity have also been extensively investigated [18][19][20][21][22].…”