Zeleňáková Adriana, Hrubovčák Pavol, Kapusta Ondrej, Kučerka Norbert, Kuklin Aleksander, Ivankov Oleksandr, Zeleňák Vladimír
P. J. Šafárik University, Department of Solid State Physics, Košice, 041 54, Slovakia.
Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Dubna, 141980, Russia.
Sci Rep. 2019 Nov 1;9(1):15852. doi: 10.1038/s41598-019-52417-w.
Structural characteristics of nanocomposite series consisting of iron oxide nanoparticles (NPs) embedded in the regular pores of amorphous silica matrix (SBA-15) were investigated by means of small angle neutron scattering (SANS). By virtue of unique neutron properties, insight into the inner structure and matter organization of this kind of systems was facilitated for the first time. Based on rigorous experimental support, fundamental model describing the neutron scattering intensity distribution was proposed by assuming general composite structural features. Model application to SANS data confirmed the presence of iron oxide NPs in the body of examined matrices, providing additional information on their shape, concentration and size distribution. Scattering superposition principle employed in the model conception allows for tailoring its fundamental characteristics, and renders it a potent and versatile tool for a wide range of applications.
通过小角中子散射（SANS）研究了由嵌入无定形二氧化硅基质（SBA - 15）规则孔中的氧化铁纳米颗粒（NPs）组成的纳米复合材料系列的结构特征。借助独特的中子特性，首次有助于深入了解这类系统的内部结构和物质组织。基于严格的实验支持，通过假设一般的复合结构特征，提出了描述中子散射强度分布的基本模型。将该模型应用于SANS数据证实了在所研究的基质主体中存在氧化铁纳米颗粒，提供了有关其形状、浓度和尺寸分布的额外信息。模型构建中采用的散射叠加原理使其基本特征得以定制，并使其成为适用于广泛应用的强大且通用的工具。
