Small-angle X-ray scattering (SAXS) off parallel, cylindrical, well-defined nanopores: from random pore distribution to highly ordered samples
Small-angle X-ray scattering (SAXS) off parallel, cylindrical, well-defined nanopores: from random pore distribution to highly ordered samples
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DOI：
10.1007/s00339-009-5346-4
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发表时间：
2009-10-01
影响因子：
2.7
通讯作者：
Naumann, Maike
中科院分区：
文献类型：
--
作者：
Engel, Martin;Stuehn, Bernd;Naumann, Maike
本文报道了两种介孔体系的结构表征：聚碳酸酯中的随机分布平行孔（ITPC）和氧化铝中的有序平行孔（npAlox）。用二维探测器对这两个系统进行了小角度x射线散射（SAXS）研究。介绍了一种分析各向异性散射模式的方法。采用基于圆柱孔模型的模型函数对数据进行拟合。我们收到了图案的定量描述。模型函数中使用的参数与样品的物理性质直接相关。特别是，借助非均匀硬盘流体混合物的结构因子，可以描述氧化铝中不太完美有序孔隙的散射曲线。
We report on the structural characterization of two mesporous systems: randomly distributed parallel pores in polycarbonate (ITPC) and ordered parallel pores in alumina (npAlox). Both systems are investigated with small-angle X-ray scattering (SAXS) using a two-dimensional detector. A method is described to analyze the anisotropic scattering patterns. The data are fitted using model functions based on accepted models for cylindrical pores. We receive a quantitative description of the patterns. Parameters used in the model function are directly related to the physical properties of the samples. In particular it is possible to describe the scattering curve for less perfectly ordered pores in alumina with the help of a structure factor for an inhomogeneous hard-disc fluid mixture.