Qazi S Junaid S, Rennie Adrian R, Cockcroft Jeremy K, Vickers Martin
Materials Physics, Uppsala University, Angströmlaboratoriet, Box 530, 75121 Uppsala, Sweden.
J Colloid Interface Sci. 2009 Oct 1;338(1):105-10. doi: 10.1016/j.jcis.2009.06.006. Epub 2009 Jun 7.
Laboratory X-ray diffraction is used to investigate the size and shape of dispersed plate-like and spherical colloidal particles. Analysis of the wide-angle diffraction data provides information about the size and shape of crystals from the width of the Bragg peaks according to the Debye-Scherrer formula. The measurements, data analysis, and evaluation are discussed. It is shown that X-ray diffraction with conventional laboratory equipment on dispersed particles is feasible as a tool to determine both particle size and shape. Data for two samples--gold colloids and nickel (II) hydroxide particles are presented. The advantages and limitations of the method are discussed. X-ray diffraction measurements that are made in combination with dynamic light scattering can be used to estimate the thickness of stabilizing layers of polymers.
实验室X射线衍射用于研究分散的片状和球形胶体颗粒的大小和形状。根据德拜-谢乐公式，通过对广角衍射数据的分析，从布拉格峰的宽度可获得有关晶体大小和形状的信息。文中讨论了测量、数据分析及评估过程。结果表明，使用常规实验室设备对分散颗粒进行X射线衍射作为确定颗粒大小和形状的工具是可行的。给出了两个样品——金胶体和氢氧化镍颗粒的数据。讨论了该方法的优缺点。结合动态光散射进行的X射线衍射测量可用于估算聚合物稳定层的厚度。
