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Showing 1 to 20 of 35 for “"cerium oxide"”.
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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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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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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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Electrical properties and defect structures of praseodymium-cerium oxide solid solutions
… of electrical conductivity in praseodymium cerium oxide (PCO) was developed. Four point DC conductivity measurements were made from 1 atm to 1018 atm p02 over isotherms ranging from 600-1 000Ê»C in materials containing 0-20% Pr. A pO02-dependent ionic conductivity was observed at high pO2 …
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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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Use Of Cerium Oxide Nanoparticles For Protection Against Radiation-induced Cell Death
The ability of engineered cerium oxide nanoparticles to confer radioprotection was examined. Rat astrocytes were treated with cerium oxide nanoparticles to a final concentration of 10 nanomolar, irradiated with a single 10 Gy dose of ionizing radiation and cell death was evaluated by propidium …
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Fundamental Aspects Of Regenerative Cerium Oxide Nanoparticles And Their Applications In Nanobiotechnology
Cerium oxide has been used extensively for various applications over the past two decades. The use of cerium oxide nanoparticles is beneficial in present applications and can open avenues for future applications. The present study utilizes the microemulsion technique to synthesize uniformly …
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Modification of space charge transport in nanocrystalline cerium oxide by heterogeneous doping
… and storage technologies such as solid oxide fuel cells, nano-ionic materials have become increasingly relevant because unique physical and transport properties that occur on the nanoscale may potentially lead to improved device performance. Nanocrystalline cerium oxide, in particular, …
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Chronic Impact Of Cerium Oxide Nanoparticles On Solanum Lycopersicum L. And Brassica Rapa L.
Cerium Oxide Nanoparticles (CeO2-NPs) are commonly used in polishing, engine enhancement agents and many other commercial products. Increased applications and accidental release have raised concerns on the potential impact of CeO2-NPs on the environment. Most previous studies focused on the short …
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Development and characterization of cerium oxide coatings deposited by spontaneous processes on metallic substrates
… immersion processes were developed to deposit cerium oxide coatings on aluminum alloy 7075-T6 and copper foils for corrosion protection and as an electrical insulator, respectively"--Abstract, page iv.
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VIABILITY OF CERIUM OXIDE NANOPARTICLES AS A RADIOPROTECTOR AGAINST PROTON RADIATION FOR NON-MALIGNANT CELLS
… this goal are continually being investigated. Cerium Oxide (CeO₂) or ceria nanoparticles have recently shown to act as a radioprotector for non-malignant cells while sensitizing tumor cells to x-rays. However, research is required to determine if the same benefits are present for heavy …
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Nanostructured Cerium Oxide-based Catalysts for the Chemical Conversion of CO2 to Dimethyl Carbonate and Methane.
… (CCU) technologies, aiming to transform carbon dioxide into high value-added compounds such as dimethyl carbonate (DMC) and methane. Specifically, the research activity was centered on the design and characterization of ceria-based catalysts to improve the efficiency of the direct synthesis of DMC …
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The effect of oxygen partial pressure on the epitaxy of cerium oxide films deposited on nickel substrates
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Nano-scale Glucose Fuel Cells for Energy Harvesting in the Human Body Based on Proton Conduction in Cerium Oxide
Future implantable medical devices such as sensors, drug delivery systems, and electroceuticals require efficient, reliable, and highly miniaturized power sources. To date, the predominant power source of implants is the Li–I2 pacemaker battery, which is limited in its scale-down potential without …
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Electrochemical synthesis of CeO2 and CeO2/montmorillonite nanocomposites.
Nanocrystalline cerium oxide thin films on metal and semiconductor substrates have been fabricated with a novel electrodeposition approach - anodic oxidation. X-ray diffraction analysis indicated that as-produced cerium oxide films are characteristic face-centered cubic fluorite structure with 5 ~ …
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Implications of the Use of Cerium Oxide Nanoparticle Diesel Fuel-Borne Catalysts: From Transformation During Combustion Through Exposure to Plants and Soils
The fate of nanoparticulate cerium oxide from the diesel fuel catalyst Envirox was studied from its presence in the additive to its transformations during combustion through its exposure to plants and soils using a broad range of analytical techniques. Envirox is a fuel-borne catalyst comprised of …
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Investigating the biological effects of (nano)particles in Alzheimer’s disease pathologies
… in AD pathogenesis therefore the antioxidant, cerium oxide has emerged as a potential therapy. Cerium oxide has been used as a biomedicine for cancer therapy and ischemic stroke, however not for AD. This inspired the systematic and bibliometric review on cerium oxide from 1990-2020 (chapter 5), …
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Development of Kinetic Monte Carlo Code to Study Oxygen Mobility in Lanthanum-doped Ceria
… code to study oxygen mobility in lanthanum-doped cerium oxide, and to demonstrate this code as a validation tool by simulating oxygen diffusion and comparing the results with experimental data to confirm the so-called lanthanum trapping effect. Molecular Statics simulations were performed using …
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