The research group of Professor Yuji Sasaki of the University of Tokyo and Professor Yuji Goto of Osaka University succeeded in observing the moment when the ions in the solution crystallize for the first time in the world.It turned out that the ions are moving violently contrary to the conventional expectations.

 The precipitation phenomenon in which solids such as crystals appear from substances dissolved in liquids is involved in various industrial fields.In addition, many diseases are known to be caused by abnormalities in which molecules in the body become solid.Therefore, elucidating the detailed mechanism of the precipitation phenomenon has the potential to lead to the development of new materials and the prevention of diseases.However, it is difficult to observe the movement of very small molecules and ions in detail in solution, and it has not been possible to observe the moment of precipitation until now.

 This time, when I tried to observe the moment of crystallization of sodium acetate by the method called X-ray single molecule tracking method developed by Professor Sasaki in 1998, sodium acetate gathers toward precipitation in a solution that exceeds the saturation amount. I was able to observe the situation.Until now, it was thought that the ions did not move much at the moment of crystallization, but unexpectedly, it turned out that there are lumps that move extremely fast.This movement is thought to be deeply involved in crystal formation.

 If we can elucidate the mechanism of motion newly discovered this time, we can expect that it will lead to the development of new materials that can control the precipitation of solids and utilize that state.From a medical point of view, it may be possible to prevent the formation of stones and the precipitation of proteins in the brain, which is said to be the cause of Alzheimer's disease.In the future, research will proceed toward the elucidation of new phenomena that have just been discovered.

Tokyo University

Established in the 10th year of the Meiji era.A university with the longest history in Japan and at the forefront of Japanese knowledge

The University of Tokyo was established in 1877 (Meiji 10) by integrating the Tokyo Kaisei School and the Tokyo Medical School.Since its establishment, it has developed education and research in a unique way in the world as a leading university in Japan and an academic center for the fusion of East and West cultures.As a result, many human resources have been produced in a wide range of fields, and many research achievements […]

Osaka University

The "true value" of each person becomes the "evolution" of Osaka University.To a university that lives in the community and extends to the world

Osaka University is a research-based university with 11 faculties and 23 departments. Since its founding in 1931, with the motto of "living in the region and extending to the world," we have created an outstanding "foundation" and "power" that weaves advanced education and research capabilities, the harmony of faculty and staff, and the weight of tradition and the advantage of Osaka. I have.Taking advantage of these excellent potentials […]

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