中文摘要：

以过硫酸铵为引发剂，固定反应单体物质的量之比，采用一步无皂乳液聚合法，制备粒径不同的聚（苯乙烯-N- 异丙基丙烯酰胺）纳米粒子，研究了反应单体用量对纳米粒子粒径的影响；然后利用简单的垂直沉积法，在载玻片上自组装光子晶体薄膜。结果表明：制备的纳米粒子具有较高的单分散性并呈明显的核 壳结构，其粒径与反应单体用量呈线性关系；薄膜中纳米粒子呈面心立方紧密堆积，薄膜厚度约8 μm；薄膜光子禁带的实验测量值与理论计算值基本一致，且禁带与纳米粒子粒径呈线性关系；当反应单体的总物质的量分别为20,25,30,35 mmol时,自组装成的光子晶体薄膜的颜色分别呈蓝紫、蓝绿、黄绿和橘红色。

英文摘要：

Poly （styrene-N-isopropylacrylamide） nanoparticles with different sizes were prepared by one step surfactant-free emulsion polymerization using ammonium persulfate as initiator, with a constant molar ratio of monomers. The effect of the dosage of the monomers on the size of the nanoparticles was studied. Then the photonic crystals films with different colors were prepared by simple vertical deposition method. Results indicated that the nanoparticles had an obvious core shell structure and good monodispersity. There was a linear relationship between nanoparticles sizes and the dosage of the monomers. The nanoparticles of the photonic crystals films were in a close- packed face-centered cubic arrangement, and the thickness of the films was about 8 μm. The measured stopbands of the photonic crystal films were mostly identical to the theoretical calculations, and it had a linear relationship with the size of the nanoparticles. When the total mole of monomers were 20,25,30,35 mmol, the corresponding colors of the films were bluish violet, bluish green, yellow-green and jacinth, respectively.