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Silica-Ceria Hybrid Nanostructures

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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.

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Acknowledgments

U19 Project: Integrating structure activity, biokinetics and response for ENP risk assessment, NIEHS under Grant NIH U19 ES019544. EMSL, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research located at PNNL

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Authors and Affiliations

  1. Pacific Northwest National Laboratory, Richland, WA, 99352, USA

    P. Munusamy, Shail Sanghavi, P. Nachimuthu, Donald R. Baer & S. Thevuthasan

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  1. P. Munusamy
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  2. Shail Sanghavi
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  3. P. Nachimuthu
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  4. Donald R. Baer
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  5. S. Thevuthasan
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Munusamy, P., Sanghavi, S., Nachimuthu, P. et al. Silica-Ceria Hybrid Nanostructures. MRS Online Proceedings Library 1471, 87–91 (2012). https://doi.org/10.1557/opl.2012.1458

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  • DOI: https://doi.org/10.1557/opl.2012.1458

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