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. 2014 Aug 21;15(1):700. doi: 10.1186/1471-2164-15-700

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© Fisichella et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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High-Resolution Transmission Electron Microscope images of CeO ₂ NPs and Nanobyk™ NPs in deionized water. A) uncoated CeO₂ NPs, B) NB NPs before treatment, C) NB NPs after 4 months aging in daylight (NB-DL), and D) NB NPs after acidic degradation (NB-DA). The inter-reticular distance (d_hkl) measured at ~3.2 Å is attributed to the (111) crystalline plane of CeO₂. No changes in shape, crystal structure, or CeO₂ cluster size were observed by HRTEM.