Nanoscale heterogeneity in ceria zirconia with low-temperature redox properties

Article Abstract:

A study uses a spray freezing method to investigate nanoscale compositional and structural variations in [Ce.sub.0.5][Zr.sub.0.5][O.sub.2] samples with different redox properties. Results suggest that, during the early stage of particle formation, the crystallization process is initiated via the nucleation of ceria-rich nanodomains, resulting in the formation of a high-surface-area material that exhibits nanoscale heterogeneity consisting of Ce-rich cores surrounded by Zr-rich shells.

Cerium & Compounds, Usage, Zirconium oxide, Spray drying, Cerium

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Mechanisms of oscillations and formation of nano-scale layered structures in induced co-deposition of some iron-group alloys Ni-P, Ni-W, and Co-W, studied by an in situ electrochemical quartz crystal microbalance technique

Article Abstract:

Mechanisms of oscillations and formation of nano-scale layered structure in induced co-deposition of some iron-group alloys Ni-P, Ni-W, Co-W were investigated. The results revealed that the electrodeposition induced co-deposition of the alloys has negative differential resistances NDRs from which the oscillations and the layer-structure formation arise.

Electronic components, not elsewhere classified, All Other Miscellaneous Nonmetallic Mineral Product Manufacturing, Quartz Crystals, Iron alloys, Tungsten alloys

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Atomic-scale study of in situ metal nanoparticle synthesis in a Ni/TiO2 system

Article Abstract:

An in situ study on the nucleation and evolution of Ni nanoparticles during reduction of a Ni(NO3)2.6H2O precursor supported on a commercial titania substrate is reported. It is observed that upon reduction, the initial Ni 'seed' crystal nucleates within the precursor patch.

Analysis, Electron microscopy, Nanoparticles

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