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- W2020444854 abstract "High-pressure ruby fluorescence spectroscopy and synchrotron X-ray diffraction are used to investigate the differential stress development and structural stability of 3 nm ceria. Upon compression of nanoceria to ∼28.2 GPa, R1 and R2 lines of ruby remain consistent in shape and sharpness. X-ray diffraction displays no reasonable evidence of peak broadening to 28.6 GPa and phase transformation to 65.1 GPa. These observations suggest an anomalous quasihydrostatic state of compressed nanoceria and a highly enhanced structural stability. Although a pressure-driven oxygen release and subsequent vacancy-induced interface superfluid reasonably explains the generation of extended quasihydrostaticity, a particle size dependent isotropic stress field and surface energy contribution to total energy explain a reversal of structural stability as compared to the size-induced reduction of transformation pressure in large scale nanoceria. These findings provide significant information not only for understanding the reversed Hall−Petch relation of nanomaterials but also for synthesizing engineering materials with tunable mechanical properties." @default.
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- W2020444854 date "2007-07-21" @default.
- W2020444854 modified "2023-10-03" @default.
- W2020444854 title "Anomalous Quasihydrostaticity and Enhanced Structural Stability of 3 nm Nanoceria" @default.
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- W2020444854 doi "https://doi.org/10.1021/jp074909g" @default.
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