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Showing 1 to 20 of 159 for “"Cerium"”.
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Photoionization of the Cerium Isonuclear Sequence and Cerium Endohedral Fullerene
… an experimental photoionization study of the cerium isonuclear sequence ions in the energy range of the 4d inner-shell giant resonance. In addition, single and double photoionization and photofragmentation cross sections of the cerium endohedral ion Ce$@$C$_{82}^{+}$ were also measured and …
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Nanoparticle Cerium oxide and Mixed Cerium Oxides for Improved Fuel Cell Lifetime
… of literature concerning of properties of bulk cerium oxide and cerium cations in solution, the discussion has been inappropriately applied to nanoscale cerium oxide resulting in many unexpected or unexplained results. In particular, there is very limited understanding about the properties of …
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Cerium and rhodium substitution in the antiferromagnetic superconductor cerium rhodium indium(5)
Among heavy fermion materials, a relationship between unconventional superconductivity and magnetism has been observed. The dependence of the magnetic transitions of CexLa1-xRhyIr1-y In5 with respect to temperature and magnetic field applied along the tetragonal c and a crystal axes is examined …
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The Radiations From Cerium-144
Made available in DSpace on 2015-05-12T17:11:45Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0006972.PDF: 4719088 bytes, checksum: 5070d88c9fcb04bfb2e5fee6f51b9264 (MD5) Previous issue date: 1953
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The Effect of the Secondary Coordination Sphere on the Stabilities of Cerium(III) and Cerium(IV) Coordination Complexes
The lanthanides, the elements from La–Lu, have intrinsic properties that make them desirable components in many technological applications as well as useful catalysts. However, lanthanides can form unpredictable solid state and solution structures due to their ionic, non-directional, and …
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Cerium-based conversion coatings on magnesium alloys
… of the deposition and corrosion behavior of cerium-based conversion coatings (CeCCs) on AZ31B and AZ91D Mg alloys. Deposition of homogenous and protective CeCCs was highly dependent on the surface preparation steps. The best results were obtained when Mg samples underwent grinding, acid …
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Quantum magnetism in cerium-based binary compounds
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
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An Investigation into Cerium Oxidation Under Acidic Conditions
… to produce individual rare earth metals. Cerium, the most abundant of these elements, is usually the largest component of commercial ores. Demand for less prevalent REE, such as neodymium and dysprosium; have led to a market saturation and price collapse of cerium. One method of improving …
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Colloidal Cerium Oxide Nanoparticle: Synthesis and Characterization Techniques
… and UV-Vis absorption spectra are collected on cerium oxide nanocrystalline particles. While CeO2 is the stable form of bulk cerium oxide, ceria nanoparticles exhibit a nonstoichiometric composition, CeO2-γ, due to the presence of oxygen vacancies and the formation of Ce2O3 at the grain …
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Cerium oxide Nanoparticles: Their Phosphatase Activity and its Control
Cerium oxide nanoparticles are established scavengers of reactive oxygen and nitrogen species. They have many potential biomedical applications that depend on their physicochemical properties and mode of preparation. Recent studies have found these nanoparticles possess phosphatase mimetic …
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Magnetic and Structural Instabilities in Cerium Diantimonides under Pressure
The cerium diantimonides CeSb₂ and CeAgSb₂ are closely related Kondo lattice materials that are ferromagnetic at ambient pressure, unlike the majority of magnetic cerium compounds. The application of hydrostatic pressure is commonly employed to discover new phases, by continuously tuning a magnetic …
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The thorium benzyne and the cerium(IV)-nitrogen bond
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1995.
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Anti-inflammatory Effects and Biodistribution of Cerium Oxide Nanoparticles
Cerium oxide nanoparticles have the unique ability to accept and donate electrons, making them powerful antioxidants. Their redox nature is due to oxygen defects in the lattice structure, which are more abundant at the nanoscale. Reactive oxygen species (ROS) are pro-oxidants whose presence is …
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Synthesis and characterization of cerium-doped lanthanum halide colloidal nanocrystals
Cerium-doped bulk lanthanum halide compounds are attractive in the field of high-energy radiation detection due to their interesting properties that include efficient radiation absorption, highly luminescent activator (cerium) emission through atomic transitions, host lattice protecting activators …
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Radiation-Enhanced Diffusion of Lanthanum in Cerium Dioxide Thin Films
Made available in DSpace on 2017-07-06T18:55:45Z (GMT). No. of bitstreams: 3 Pappas_Harrison_K_MS.pdf: 1482565 bytes, checksum: 2933869aff9af3322ffa74df3c73cca3 (MD5) Pappas_Harrison_K_MS_ABS.pdf: 89237 bytes, checksum: ddab93aa3b35515e29bd40e2482647cd (MD5) license.txt: 4813 bytes, checksum: …
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Grain boundary chemistry and morphology of heavily doped cerium dioxide
Ceria is a model system for oxygen ion conducting ceramics of the cubic fluorite structure, in which grain boundaries are known to limit the overall ionic conductivity of polycrystals. Measurements of grain boundary segregation of the aliovalent dopants Gd3+ and Ta5+ in heavily doped ceria have …
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The electrical properties of pure and doped nanocyrstalline cerium oxide
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1997.
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