Abstract
Liquid cell TEM is demonstrated to be a highly suitable new technology to study chemical reactions of cerium oxide nanostructures in aqueous environment. Ceria nanoparticles are found to show a diversity of behaviour. At low beam intensity, particle hopping movements and particle attachment, including chain formation is observable. At high intensity, when the water is turned ultra-enriched in ions by radiolysis, we find (in order of observation) particle rounding and shrinkage, followed by complete dissolution, along with formation of new reaction phases, and finally gas bubble formation.
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