摘要
通过嵌段共聚物自组装制备哑铃型Au-Fe3O4纳米粒子排列，先通过旋涂含有哑铃型纳米粒子（DBNPs）的聚苯乙烯-b-聚（2-乙烯基吡啶）（PS—b—P2VP）混合溶液得到复合薄膜，再将复合薄膜在高温下退火，实验发现，无论是预先合成的表面带有油酸基团，还是11-巯基十-烷酸修饰的哑铃型纳米粒子，都可以选择性的进入到PS—b—P2VP嵌段共聚物中的P2VP柱状微区中。实验结果表明，在退火过程中，哑铃型纳米粒子可以进入到嵌段共聚物中的一个微区中，并不取决于其表面的化学性质。
A simple method to generate arrays of dumbbell-like Au-Fe3O4 nanoparticles （DBNPs） via block copolymer selfassembly was developed. Composite films of polystyrene-block-poly （2-vinylpyridine） （PS-b-P2VP） /DBNPs were first produced by spin-coating the PS-b-P2VP） /DBNPs mixed solution. After the composite films annealed at high temperature, it was found that both the pre-synthesized DBNPs stabilized by oleic acid （OA-DBNPs） and the modified DBNPs with 11- mercaptoundecanoic acid （M-DBNPs） can be selectively incorporated into P2VP cylinders in PS-b-P2VP diblock copolymers. The results show that DBNPs can segregate into one of the domains of block copolymers and the incorporation is insensitive to particle surface chemistry during thermal annealing.
