Fakultät Physik/DELTA, Technische Universität Dortmund, Otto-Hahn-Str. 4, D-44227 Dortmund, Germany.
Phys Chem Chem Phys. 2011 Dec 7;13(45):20354-60. doi: 10.1039/c1cp22161b. Epub 2011 Oct 13.
The structure of poly(organosiloxane) nanocapsules partially filled with iron oxide cores of different sizes was revealed by small angle X-ray scattering and X-ray diffraction. The nanocapsules are synthesized by the formation of a poly(organosiloxane) shell around iron oxide nanoparticles and the simultaneous partial dissolution of these cores. Due to the high scattering contrast of the iron oxide cores compared to the polymer shell, the particle size distribution of the cores inside the capsules can be measured by small angle X-ray scattering. Additional information can be revealed by X-ray diffraction, which gives insights into the formation of the polymer network and the structure of the iron oxide cores. The study shows how the crystallinity and size of the nanoparticles as well as the shape and width of the size distribution can be altered by the synthesis parameters.
通过小角 X 射线散射和 X 射线衍射揭示了部分填充不同尺寸氧化铁核的聚有机硅氧烷纳米胶囊的结构。纳米胶囊通过在氧化铁纳米颗粒周围形成聚有机硅氧烷壳层并同时部分溶解这些核来合成。由于氧化铁核与聚合物壳层之间的高散射对比度，因此可以通过小角 X 射线散射测量胶囊内核的粒径分布。X 射线衍射可以提供有关聚合物网络形成和氧化铁核结构的更多信息。该研究表明，通过合成参数可以改变纳米颗粒的结晶度和尺寸以及粒径分布的形状和宽度。
