Issue 12, 2015

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

Abstract

Single-crystalline ceria nanorods were fabricated using a hydrothermal process and annealed at 325 °C–800 °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.

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

Supplementary files

Article information

Article type
Paper
Submitted
11 Dec 2014
Accepted
24 Jan 2015
First published
26 Jan 2015

Nanoscale, 2015,7, 5169-5177

Author version available

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

T. S. Sakthivel, D. L. Reid, U. M. Bhatta, G. Möbus, D. C. Sayle and S. Seal, Nanoscale, 2015, 7, 5169 DOI: 10.1039/C4NR07308H

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