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Imaging Gas Phase Dynamics at the Nanoscale: Insights into Silver Oxidation

This groundbreaking research from Shen Dillon at the University of Illinois at Urbana-Champaign captures gas phase dynamics at the nanoscale for the first time. By imaging the oxidation process of silver in ionized gas (such as O2 ions in an electron microscope), we gain crucial insights into the oxidation ('rusting') process, which can impact space travel and reactor technology. The study reveals real-time dynamics of silver oxidizing in ionized gas, demonstrating how silver oxide vaporizes and re-precipitates. This knowledge could lead to the creation of new materials optimized for extreme environments.

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Imaging Gas Phase Dynamics at the Nanoscale: Insights into Silver Oxidation

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  1. ‘Seeing’ Gas at the NanoscaleShen Dillon, University of Illinois at Urbana-Champaign, DMR 0906874 Outcome:Imaged gas phase dynamics at the nanoscale for the first time and provided insight into the oxidation (‘rusting’) process of silver in ionized gas (e.g. O2 split into ions in an electron microscope). Impact: Reactions in ionized gas can be important environmental limiting factors in space travel and certain types of reactors. Improved understanding of oxidation and mass transport under such conditions may lead to new materials optimized for these environments. Explanation:The video shows silver oxidizing in the presence of ionized gas. The heat evolved in the reaction causes the silver oxide to vaporize, but silver oxide vapor is not stable and silver particle re-precipitate. The dynamics of the gas may be observed in real time. Silver in the gas phase scatters electrons more strongly than the other gas present. This allows the process to be imaged directly. 50 nm 2X Speed

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