用相干X射线衍射成像揭示单个胶体晶粒的三维结构
Revealing three-dimensional structure of individual colloidal crystal grain by coherent x-ray diffractive imaging
摘要：
我们提出了一个单一的胶体晶粒上进行的相干X射线衍射成像实验的结果。通过方位角旋转扫描测量的全三维（3D）倒易空间图包含若干阶布拉格反射以及它们之间的相干干涉信号。应用迭代相位恢复方法，重建了晶粒的三维结构，并解决了单个胶体颗粒的位置。其结果是，一个精确的堆叠序列的六方密堆积层，包括平面和线性缺陷被确定。
英文摘要：
We present results of a coherent x-ray diffractive imaging experiment performed on a single colloidal crystal grain. The full three-dimensional (3D) reciprocal space map measured by an azimuthal rotational scan contained several orders of Bragg reflections together with the coherent interference signal between them. Applying the iterative phase retrieval approach, the 3D structure of the crystal grain was reconstructed and positions of individual colloidal particles were resolved. As a result, an exact stacking sequence of hexagonal close-packed layers including planar and linear defects were identified.
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