Title

Radiation-Induced Reduction of Ceria in Single and Polycrystalline Thin Films

Authors

Authors

A. Kumar; R. Devanathan; V. Shutthanandan; Svnt Kuchibhata; A. S. Karakoti; Y. Yong; S. Thevuthasan;S. Seal

Comments

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Abbreviated Journal Title

J. Phys. Chem. C

Keywords

RAY-INDUCED REDUCTION; OXIDE NANOPARTICLES; MOLECULAR-DYNAMICS; CEO2; PROTECTION; SURFACES; NANOCRYSTALS; SIMULATIONS; TRANSPORT; OXIDATION; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

Abstract

The effect of radiation on the oxidation state of Ce in high-quality single and polycrystalline ceria thin films is presented. The films were synthesized by molecular beam epitaxy and irradiated with high energy ionizing radiation of 2 MeV He+ ions with varying flux density. The surface chemistry of the irradiated ceria thin films was characterized by in situ X-ray photoelectron spectroscopy (XPS). Upon irradiation, the concentration of Ce3+ increased by 13 and 19% in single and polycrystalline ceria, respectively. Molecular dynamics simulation of thermal spikes and displacement cascade damage provide details of radiation induced defects at the end of the range of the ions that can contribute to the observed reduction.

Journal Title

Journal of Physical Chemistry C

Volume

116

Issue/Number

1

Publication Date

1-1-2012

Document Type

Article

DOI Link

http://dx.doi.org/10.1021/jp209345w

Language

English

First Page

361

Last Page

366

WOS Identifier

WOS:000298978700046

ISSN

1932-7447

Recommended Citation

"Radiation-Induced Reduction of Ceria in Single and Polycrystalline Thin Films" (2012). Faculty Bibliography 2010s. 2891.
https://stars.library.ucf.edu/facultybib2010/2891