用相干X射线散射研究层状相的体涨落动力学
Dynamics of bulk fluctuations in a lamellar phase studied by coherent x-ray scattering
摘要：
利用X射线光子相关谱研究了离子型溶致体系层状相中的层涨落。我们测量了作为波矢量的函数的面内（起伏）波动的弛豫率。在相同的实验过程中获得的静态和动态结果相结合，产生的层状相（压缩和弯曲模量）的弹性常数的值，以及滑动粘度。结果与动态光散射数据非常吻合，验证了该技术在有序相中的使用。
英文摘要：
Using x-ray photon correlation spectroscopy, we studied the layer fluctuations in the lamellar phase of an ionic lyotropic system. We measured the relaxation rate of in-plane (undulation) fluctuations as a function of the wave vector. Static and dynamic results obtained during the same experiment were combined to yield the values of both elastic constants of the lamellar phase (compression and bending moduli) as well as that of the sliding viscosity. The results are in very good agreement with dynamic light-scattering data, validating the use of the technique in ordered phases.
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