Engineering of nanoscale defect patterns in CeO2 nanorods via ex situ and in situ annealing

    Authors

    T. S. Sakthivel; D. L. Reid; U. M. Bhatta; G. Mobus; D. C. Sayle;S. Seal

    Comments

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    Abbreviated Journal Title

    Nanoscale

    Keywords

    CERIUM OXIDE NANOPARTICLES; CATALYTIC-OXIDATION; ORIENTED ATTACHMENT; OPTICAL-PROPERTIES; OXYGEN VACANCIES; DOPED CEO2; NANOSTRUCTURES; TEMPERATURE; NANOCRYSTALS; SIZE; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied

    Abstract

    Single-crystalline ceria nanorods were fabricated using a hydrothermal process and annealed at 325 degrees C-800 degrees C. As-synthesized CeO2 nanorods contain a high concentration of defects, such as oxygen vacancies and high lattice strains. Annealing resulted in an improved lattice crystalline quality along with the evolution of novel cavity-shaped defects in the nanorods with polyhedral morphologies and bound by e.g. {111} and {100} (internal) surfaces, confirmed for both air (ex situ) and vacuum (in situ) heating. We postulate that the cavities evolve via agglomeration of vacancies within the as-synthesized nanorods.

    Journal Title

    Nanoscale

    Volume

    7

    Issue/Number

    12

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    5169

    Last Page

    5177

    WOS Identifier

    WOS:000351372400012

    ISSN

    2040-3364

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