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• W1994074711 abstract "Due to reduced dimensions and increased interfacial content, nanocomposite oxides offer improved functionalities in a wide variety of advanced technological applications, including their potential use as radiation tolerant materials. To better understand the role of interface structures in influencing the radiation damage tolerance of oxides, we have conducted atomistic calculations to elucidate the behavior of radiation-induced point defects (vacancies and interstitials) at interface steps in a model CeO2/SrTiO3 system. We find that atomic-scale steps at the interface have substantial influence on the defect behavior, which ultimately dictate the material performance in hostile irradiation environments. Distinctive steps react dissimilarly to cation and anion defects, effectively becoming biased sinks for different types of defects. Steps also attract cation interstitials, leaving behind an excess of immobile vacancies. Further, defects introduce significant structural and chemical distortions primarily at the steps. These two factors are plausible origins for the enhanced amorphization at steps seen in our recent experiments. The present work indicates that comprehensive examination of the interaction of radiation-induced point defects with the atomic-scale topology and defect structure of heterointerfaces is essential to evaluate the radiation tolerance of nanocomposites. Finally, our results have implications for other applications, such as fast ion conduction." @default.
• W1994074711 created "2016-06-24" @default.
• W1994074711 creator A5010358439 @default.
• W1994074711 creator A5013884845 @default.
• W1994074711 creator A5053778615 @default.
• W1994074711 creator A5061005034 @default.
• W1994074711 date "2014-05-20" @default.
• W1994074711 modified "2023-10-18" @default.
• W1994074711 title "Defect interactions with stepped CeO₂/SrTiO₃ interfaces: Implications for radiation damage evolution and fast ion conduction" @default.
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