The emulsifier-free emulsion polymerization of styrene and N-isopropylacrylamide(NIPAM) was successfully carried out with microwave irradiation

and the thermosensitive particles with diameters in the range 130～150 nm were prepared．The effect of temperature on the hydrodynamie diameter of particles was characterized by PCS the diameter of particles was decreased as the temperature increased from 25℃ to 40℃．and the particles showed thermo-reversible phase transition phenomenon at 32℃．The morphology

size and size distribution of the particles were characterized by SEM and PCS．The ordered two-dimensional films were prepared by using the capillary force method on the clean glassware wafers

and the molpbology of two-dimensional films was studied by AFM.