Charge-stabilized liquidlike ordered binary colloidal suspensions. 1. Ultra-small-angle X-ray scattering characterization
Charge-stabilized liquidlike ordered binary colloidal suspensions. 1. Ultra-small-angle X-ray scattering characterization
复制标题
电荷稳定的液体状有序二元胶体悬浮液。
作者：
N. Lutterbach;H. Versmold;V. Reus;L. Belloni;T. Zemb
在这篇和接下来的论文中，我们提出了由电荷稳定的聚苯乙烯（PS）和全氟（PFA）粒子的直径分别为σ = 79和162 nm的二元胶体混合物的散射研究。将两种胶体物质混合成明确定义的组合物。总浓度为约9体积%级分。利用X射线超小角散射，我们直接得到了类液体有序悬浮液中PFA粒子的部分散射强度。此外，在将强度除以PFA颗粒形状因子P PFA（Q）之后，我们得到了部分结构因子S PFA-PFA（Q），而无需任何额外的处理。实验结果进行了比较，从纯排斥DLVO潜力和超网链（HNC）积分方程，适用于带电胶体混合物的理论预测。结果表明，所有的测量强度和提取的结构因子与理论结果符合得很好。
In this and the following paper we present scattering studies on binary colloidal mixtures made of charge-stabilized polystyrene (PS) and perfluorinated (PFA) particles with diameters σ = 79 and 162 nm, respectively. Both colloidal species were mixed to well-defined compositions. The total concentration was about 9 vol % fraction. By using ultra-small-angle X-ray scattering, we directly obtained the partial scattering intensities of only the PFA particles in liquidlike ordered suspensions. Furthermore, after dividing intensities by the PFA particle form factor P PFA (Q), we got the partial structure factor S PFA-PFA (Q) without any additional treatment. The experimental results are compared with theoretical predictions obtained from the pure repulsive DLVO potentials and the hypernetted chain (HNC) integral equation, as applied to charged colloidal mixtures. It is shown that all measured intensities and extracted structure factors are in good agreement with the theoretical results.