SAXS of self-assembled oriented lamellar nanocomposite film: an advanced method of evaluation
SAXS of self-assembled oriented lamellar nanocomposite film: an advanced method of evaluation
复制标题
自组装取向层状纳米复合薄膜的 SAXS：一种先进的评估方法
DOI：
10.1107/s0021889804011288
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发表时间：
2004
影响因子：
6.1
通讯作者：
B. Smarsly
中科院分区：
文献类型：
--
作者：
W. Ruland;B. Smarsly
采用蒸发诱导自组装法制备了有机/无机交替层状纳米复合材料，并对其在对称和非对称反射下的小角X射线散射进行了研究。用解析表达式对实验数据进行了定量拟合。利用堆积模型和晶格模型，用平均片层厚度、平均周期和相应的方差对片层两相系统进行了全面的表征。此外，还确定了磁区边界的宽度和择优取向。两种模型得到的参数没有显著差异，但格子模型得到了更好的曲线拟合。有限的堆叠高度和仪器加宽的影响被发现是不可区分的。
Oriented lamellar nanocomposites formed of alternating organic and inorganic layers were prepared by evaporation-induced self-assembly and studied by small-angle X-ray scattering in symmetrical and asymmetrical reflection. Analytical expressions were used for a quantitative fit of the experimental data. The fitting procedure leads to a comprehensive characterization of the lamellar two-phase system in terms of the average thicknesses of the lamellae, the average period and the corresponding variances, using both the stacking model and the lattice model. Furthermore, the width of the domain boundary and the preferred orientation were determined. No significant differences could be found between the parameters obtained for the two models, but the lattice model leads to a better curve fitting. The effects of finite stack height and of instrumental broadening were found to be indistinguishable.