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Efficient synthetic access to thermoresponsive core/shell nanoparticles

机译:高效合成访问热响应芯/壳纳米粒子

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Core/shell nanostructures based on silica, fluorescent ZnO quantum dots (QDs) and superparamagnetic Fe3O4 nanoparticles (NPs) were prepared and fully characterized by the combination of different techniques and the physical properties of the nanostructures were studied. We demonstrate the efficiency of the atom transfer radical polymerization with activators regenerated by electron transfer process to graft (co-) polymers of different structures and polarity at the surface of metal oxide NPs. The influence of the polymer chain configuration on the optical properties of the ZnO/polymer core/shell QDs was enlightened. Concerning the magnetic properties of the Fe3O4/polymer nanostructures, only the amount of the grafted polymer plays a role on the saturation magnetization of the NPs and no influence of the aggregation was evidenced. The simple and fast process described in this work is efficient for the grafting of copolymers from surfaces and the derived NPs display the combination of the physical properties of the core and the macromolecular behavior of the shell.
机译:制备基于二氧化硅,荧光ZnO量子点(QDS)和超顺磁性Fe3O4纳米颗粒(NPS)的核/壳纳米结构,并通过不同技术的组合进行了完全表征,研究了纳米结构的物理性质。我们证明了原子转移自由基聚合与通过电子转移过程再生的激活剂的效率与金属氧化物NPS表面的不同结构和极性的移植物(共)聚合物。聚合物链构型对ZnO /聚合物核心/壳QD的光学性质的影响是开明的。关于Fe3O4 /聚合物纳米结构的磁性,仅接枝的聚合物的量在NPS的饱和磁化强度上起作用,并且证明了聚集的影响。本作作品中描述的简单且快速的方法是有效的,用于从表面和衍生的NPS嫁接共聚物,并且衍生的NPS显示核心的物理性质和壳体的大分子行为的组合。

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