Understanding the influence of radiation exposure on ceria nanoparticle surface chemistry
EMSL Project ID
30507
Abstract
Primary focus of this work is to study the effect of radiation exposure on the surface chemistry of cerium oxide. High quality, single and polycrystalline thin films of ceria will be synthesized using molecular beam epitaxy and nanoparticles will be synthesized using wet chemical routes.Both particles and films will be exposed to variable and cumulative dose of the He+ radiation over 2-8 MeV and the changes in the oxidation state of Cerium will be monitored through in situ XPS analysis. It is anticipated that the out come of this proposal, as explained in the main text, will significantly improve the mechanistic understanding of the role of cerium oxide in protecting from ROI species.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2008-08-01
End Date
2011-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Karakoti AS, J King, A Vincent, and S Seal. 2010. "Synthesis Dependent Core Level Binding Energy Shift in the Oxidation State of Platinum Coated on Ceria–Titania and its Effect on Catalytic Decomposition of Methanol." Applied Catalysis. A, General 388(1-2):262-271. doi:10.1016/j.apcata.2010.08.060
Karakoti AS, S Das, S Thevuthasan, and S Seal. 2010. "PEGylated Inorganic Nanoparticles." PNNL-SA-75051, Pacific Northwest National Laboratory, Richland, WA.
Kumar A, R Devanathan, V Shutthanandan, SVNT Kuchibhatla, AS Karakoti, Y Yang, S Thevuthasan, and S Seal. 2012. "Radiation-Induced Reduction of Ceria in Single and Polycrystalline Thin Films." Journal of Physical Chemistry C 116(1):361-366. doi:10.1021/jp209345w
Sanghavi RP, R Devanathan, MI Nandasiri, SVNT Kuchibhatla, L Kovarik, S Thevuthasan, and S Prasad. 2011. "Integrated experimental and modeling study of the ionic conductivity of samaria-doped ceria thin films." Solid State Ionics 204-205:13-19. doi:10.1016/j.ssi.2011.10.007
Shirato N, J Strader, A Kumar, A Vincent, P Zhang, AS Karakoti, P Nachimuthu, HJ Cho, S Seal, and R Kalyanaraman. 2011. "Thickness dependent self limiting 1-D tin oxide nanowire arrays by nanosecond pulsed laser irradiation." Nanoscale 3(3):1091-1101. doi:10.1039/C0NR00689K
Singh S, T Dosani, AS Karakoti, A Kumar, S Seal, and W Self. 2011. "A phosphate-dependent shift in redox state of cerium oxide nanoparticles and its effects on catalytic properties." Biomaterials 32(28):6745-6753. doi:10.1016/j.biomaterials.2011.05.073