2025 年 67 巻 4 号 p. 233-237
Microcrystal electron diffraction(MicroED)is a technique that provides researchers with three-dimensional molecular structures from submicron-order crystals because the interaction between electrons and material is thousands of times stronger than that of X-rays. Additional advantage of this strong interaction is multiple scattering. Multiple scattering is highly sensitive to the three-dimensional arrangement of atoms, therefore by employing structural refinement based on dynamical diffraction theory, it becomes possible to determine the absolute structure of crystals. In this paper, we introduce characteristics of MicroED, some critical points for measurement and structure analysis, and examples of structure determination using an instrument dedicated to MicroED.