Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 6, Pages 1832-1835Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201410398
Keywords
cerium; electron transfer; nanoparticles; oxides; surface chemistry
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Funding
- Chinese MOST 973 Program [2011CB933400, 2013CB932703, 2012CB932504]
- National Natural Science Foundation of China [11275215, 11275218]
- FDA Nanotechnology CORES Program
- Office of Cosmetics and Colors, CFSAN/FDA
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Ceria nanoparticles (nanoceria) are well known as a superoxide scavenger. However, inherent superoxide-scavenging ability has only been found in the nanoceria with sizes of less than 5nm and with very limited shape diversity. Reported herein is a strategy to significantly improve the superoxide-scavenging activity of nanoceria sized at greater than 5nm. The nanoceria with sizes of greater than 5nm, with different shapes, and with a negligible Ce3+/Ce4+ ratio can acquire remarkable superoxide-scavenging abilities through electron transfer. This method will make it possible to develop nanoceria-based superoxide-scavengers with long-acting activity and tailorable characteristics.
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