Polymer nanospheres are synthesized by free-radical dispersion copolymerization of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM) with a methacryloyl-terminated polystyrene (PS-MC) macromonomer in cyclohexane. Such polymer nanospheres are stabilized sterically with polystyrene (PS)-grafted chains in cyclohexane at temperatures greater than 34 degrees C (the Theta temperature for PS). Ordered microporous surface films are constructed by casting these core-shell-type nanospheres from hot cyclohexane solution at 20 degrees C. The results indicate the possibility of fixation or encapsulation of functional materials after microporous patterning of the core-shell-type nanospheres.