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Silica-Ceria Hybrid Nanostructures

Published online by Cambridge University Press:  29 August 2012

P. Munusamy ,
Shail Sanghavi ,
P. Nachimuthu ,
Donald R. Baer  and
S. Thevuthasan
P. Munusamy
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
Shail Sanghavi
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
P. Nachimuthu
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
Donald R. Baer
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
S. Thevuthasan
Affiliation:
Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
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Abstract

A new hybrid material system that consists of ceria attached silica nanoparticles has been developed. Because of the versatile properties of silica and antioxidant properties of ceria nanoparticles, this material system is ideally suited for biomedical applications. The silica particles of size ∼50nm were synthesized by the Stöber synthesis method and ceria nanoparticles of size ∼2-3nm was attached to the silica surface using a hetrocoagulation method. The presence of silanol groups on the surface of silica particles mediated homogenous nucleation of ceria which were attached to silica surface by Si-O-Ce bonding. The formations of silica-ceria hybrid nanostructures were characterized by X-photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM). The HRTEM image confirms the formation of individual crystallites of ceria nanoparticles attached to the silica surface. The XPS analysis indicates that ceria nanoparticles are chemically bonded to surface of silica and possess mixture of +3 and +4 chemical states.

Keywords

core/shellnanostructurebiomaterial
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1471: Symposium YY – Rare-Earth-Based Materials , 2012 , mrss12-1471-yy04-13
Copyright
Copyright © Materials Research Society 2012

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References

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