Researchers Observe Nanoparticles Ripening in Solution at Record-Breaking Resolution.
Jul 27 2022Reviewed by Bethan Davies A textbook process called “Ostwald ripening,” named after the Nobel Prize-winning chemist Wilhelm Ostwald, has directed the design of new materials such as nanoparticles for decades. These are tiny materials that appear to be so small that they are not visible to the naked eye.
Haimei Zheng, Study Senior Author and Adjunct Professor, Materials Science and Engineering, University of California, BerkeleyFor the study, the scientists suspended a solution of cadmium sulfide nanoparticles with hydrogen chloride and cadmium chloride in a custom liquid sample holder. In one of the experiments, an LC-TEM video displays a small Cd-CdCl2 core-shell nanoparticle blending with a huge Cd-CdCl2 CSNP to develop a bigger Cd-CdCl2 CSNP. But the direction of growth was headed not by a variation in size but by a crack defect in the shell of the initially bigger CSNP.
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