Ordered gold nanoparticle arrays obtained with supramolecular block copolymers
Ordered gold nanoparticle arrays obtained with supramolecular block copolymers
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DOI：
10.1039/c3sm27373c
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发表时间：
2013-04
期刊：
影响因子：
3.4
通讯作者：
Tieying Ye;Xiaofang Chen;Xinghe Fan;Zhihao Shen
中科院分区：
文献类型：
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作者：
Tieying Ye;Xiaofang Chen;Xinghe Fan;Zhihao Shen
我们展示了一种简单的方法来生产的金纳米粒子与超分子嵌段共聚物形成的扇形小分子L和聚苯乙烯-b-聚（4-乙烯基吡啶）（PS-b-P4 VP）通过氢键的纳米复合材料的自组装。通过将聚合物PS-b-P4 VP、小分子L和金纳米颗粒共混，获得了杂化物PS-b-P4 VP（L）n，其中n是L与4VP的摩尔比。随着超分子方法的使用，纳米颗粒或聚合物的化学改性是不必要的。通过改变n的值，实现了Au纳米粒子的有序化和有序化。此外，在其中一种杂化物Au/PS-b-P4 VP（L）1.0中观察到了分级结构内结构形态，其中Au/P4 VP（L）n畴形成了由纳米相分离稳定的六方堆积。杂化材料自组装成球形、层状或圆柱形结构，其特征在于通过小角X射线散射和透射电子显微镜。L和Au纳米颗粒的含量可以影响自组装结构的类型和尺寸。
We demonstrate a simple approach to produce self-assembly of nanocomposites of gold nanoparticles with a supramolecular block copolymer formed by a fan-shaped small molecule L and polystyrene-b-poly(4-vinyl pyridine) (PS-b-P4VP) through hydrogen bonding. Hybrids PS-b-P4VP(L)n, where n is the molar ratio of L to 4VP, were obtained by blending the polymer PS-b-P4VP, the small molecule L, and gold nanoparticles. With the use of the supramolecular approach, chemical modification of either the nanoparticle or the polymer is unnecessary. The organization of Au nanoparticles with controlled inter-particle distance and ordering was realized by changing the value of n. In addition, a hierarchical structure-within-structure morphology was observed for one of the hybrids, Au/PS-b-P4VP(L)1.0, in which the Au/P4VP(L)n domains form a hexagonal packing stabilized by nano-phase separation. The hybrids self-assemble into sphere, lamella, or cylinder structures, which were characterized by small-angle X-ray scattering and transmission electron microscopy. The contents of both L and Au NPs can affect the type and size of the self-assembled structure.