Institute of Physical Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany.
JCNS-1 and ICS-1, Forschungszentrum Jülich GmbH , Leo-Brandt-Straße, 52425 Jülich, Germany.
ACS Nano. 2017 Apr 25;11(4):3767-3775. doi: 10.1021/acsnano.6b08441. Epub 2017 Mar 21.
Nanocomposite materials based on highly stable encapsulated superparamagnetic iron oxide nanocrystals (SPIONs) were synthesized and characterized by scattering methods and transmission electron microscopy (TEM). The combination of advanced synthesis and encapsulation techniques using different diblock copolymers and the thiol-ene click reaction for cross-linking the polymeric shell results in uniform hybrid SPIONs homogeneously dispersed in a poly(ethylene oxide) matrix. Small-angle X-ray scattering and TEM investigations demonstrate the presence of mostly single particles and a negligible amount of dyads. Consequently, an efficient control over the encapsulation and synthetic conditions is of paramount importance to minimize the fraction of agglomerates and to obtain uniform hybrid nanomaterials.
基于高度稳定的封装超顺磁性氧化铁纳米晶体（SPIONs）的纳米复合材料通过散射方法和透射电子显微镜（TEM）进行了合成和表征。先进的合成和封装技术的结合使用了不同的二嵌段共聚物，并通过硫醇-烯点击反应进行交联聚合物壳，导致均匀的混合 SPIONs 均匀分散在聚（氧化乙烯）基质中。小角 X 射线散射和 TEM 研究表明，主要存在单颗粒和可忽略量的二聚体。因此，对封装和合成条件进行有效的控制对于最小化团聚体的分数并获得均匀的混合纳米材料至关重要。
