Anitas Eugen Mircea
Joint Institute for Nuclear Research, Dubna 141980, Russia.
Nanomaterials (Basel). 2019 Apr 22;9(4):648. doi: 10.3390/nano9040648.
Formation of fractal aggregates is generally an undesired effect which may lead to end products with worse properties as compared to those of the individual components, especially in nanocomposite materials. Although several methods exist to overcome this issue, such as inclusion of additives, irradiation grafting or sonication, their effectiveness relies on a detailed knowledge of the structural properties of the aggregates. Here, small-angle scattering (SAS) technique is used and a theoretical model based on a unified Guinier-Porod approach with weak correlations is developed for investigating the structural properties of nanoscale fractal aggregates. It is shown how one can extract information concerning the correlation length/degree between aggregates, their fractal dimension and the overall size. These parameters can be used for development of various types of novel nanomaterials with pre-determined properties and functions.
分形聚集体的形成通常是一种不理想的效应，与单个组分相比，它可能导致最终产品的性能更差，尤其是在纳米复合材料中。尽管存在几种方法来克服这个问题，例如添加添加剂、辐射接枝或超声处理，但其有效性依赖于对聚集体结构特性的详细了解。在此，使用小角散射（SAS）技术，并开发了一种基于具有弱相关性的统一吉尼尔 - 波罗德方法的理论模型，用于研究纳米级分形聚集体的结构特性。展示了如何提取有关聚集体之间的相关长度/程度、它们的分形维数和整体尺寸的信息。这些参数可用于开发具有预定性能和功能的各种新型纳米材料。
