Konefał Magdalena, Černoch Peter, Patsula Vitalii, Pavlova Ewa, Dybal Jiří, Załęski Karol, Zhigunov Alexander
Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic.
NanoBioMedical Centre, Adam Mickiewicz University, ul. Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland.
ACS Appl Mater Interfaces. 2021 Feb 24;13(7):9195-9205. doi: 10.1021/acsami.0c21549. Epub 2021 Feb 10.
The influence of magnetite nanoparticles coated with poly(acrylic acid) (FeO@PAA NPs) on the organization of block copolymer thin films via a self-assembly process was investigated. Polystyrene--poly(4-vinylpyridine) films were obtained by the dip-coating method and thoroughly examined by X-ray reflectivity, transmission electron microscopy, atomic force microscopy, and grazing incidence small-angle scattering. Magnetic properties of the films were probed via superconducting quantum interference device (SQUID) magnetometry. It was demonstrated that due to the hydrogen bonding between P4VP and PAA, the FeO@PAA NPs segregate selectively inside P4VP domains, enhancing the microphase separation process. This in turn, together with employing carefully optimized dip-coating parameters, results in the formation of hybrid thin films with highly ordered nanostructures. The addition of FeO@PAA nanoparticles does not change the average interdomain spacing in the film lateral nanostructure. Moreover, it was shown that the nanoparticles can easily be removed to obtain well-ordered nanoporous templates.
研究了聚（丙烯酸）包覆的磁铁矿纳米颗粒（FeO@PAA NPs）通过自组装过程对嵌段共聚物薄膜结构的影响。通过浸涂法制备了聚苯乙烯-聚（4-乙烯基吡啶）薄膜，并通过X射线反射率、透射电子显微镜、原子力显微镜和掠入射小角散射对其进行了全面研究。通过超导量子干涉仪（SQUID）磁力测量法探测了薄膜的磁性。结果表明，由于P4VP和PAA之间的氢键作用，FeO@PAA NPs选择性地在P4VP域内偏析，增强了微相分离过程。这反过来，再加上精心优化的浸涂参数，导致形成具有高度有序纳米结构的混合薄膜。添加FeO@PAA纳米颗粒不会改变薄膜横向纳米结构中的平均域间距。此外，研究表明，纳米颗粒可以很容易地去除，以获得有序的纳米多孔模板。
