title: In situ transmission electron microscopy observation of silver oxidation in ionized/atomic gas.
abstract: The interaction between silver and ionized and atomic gas was observed directly by in situ transmission electron microscopy with an environmental cell for the first time. The electron beam provides dual functions as the source of both gas ionization and imaging. The concentration of ionized gas was tuned via adjusting the current density of the electron beam. Oxidation of the silver is observed in situ, indicating the presence of ionized and/or atomic oxygen. The evolution of microstructure and phase constituents was characterized. Then the oxidation rate was measured, and the relationships among grain size, mass transport rate, and electron flux were characterized. The role of the electron beam is discussed, and the results are rationalized with respect to ex situ results from the literature.
authors: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: Li
authors: L
authors: Sun
authors: Kyong Wook
authors: KW
authors: Noh
authors: Jian-Guo
authors: JG
authors: Wen
authors: Shen J
authors: SJ
authors: Dillon
mesh_terms: D046529:Microscopy, Electron, Transmission; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D012834:Silver; D010100:Oxygen