Lanthanide Doped Nanocrystalline Ceria Coating For Increasing Oxidation Resistance Of Stainless Steel And Associated Methods

Disclosed is a method of applying to stainless steel a protective coating effective in increasing oxidation resistance, the method includes cleaning and pre-oxidizing in hot dry air, cooling and creating the cooled stainless steel with nanocrystalline ceria particles doped with a lanthanide metal. Cleaning may include ultrasound and optionally polishing. Cooling is conducted in air and coating is preferably effected by dipping the stainless steel into a composition containing the nanocrystalline ceria particles. The invention includes a coating effective for retarding oxidation of stainless steel, the coating comprising nanocrystalline ceria particles doped with a lanthanide, a preferred lanthanide being lanthanum and preferred nanocrystalline ceria particles are approximately 3 nm in size and contain from about 2 to 40 atom % of dopant

Methods and materials for stimulating proliferation of stem cells (DIV)

Disclosed herein are methods and materials for influencing proliferation of stem cells. Specifically exemplified herein are compositions comprising cerium oxide nanoparticles which can be used to stimulate proliferation of stem cells under common culture conditions, or which can be utilized to improve therapeutic outcomes

METHODS OF PROMOTING ANGIOGENESIS USING CERIUM OXIDE NANOPARTICLES

Methods of using cerium oxide nanoparticles to promote angiogenesis are described. In a particular embodiment, a method of promoting angiogenesis in tissue comprises contacting the tissue with a composition comprising cerium oxide nanoparticles effective for stimulating proliferation of endothelial cells associated with the tissue

Advanced Catalyst System Prepared from a Whiskered Aluminum-Containing Metallic Alloy Substrate

A method for whisker formation on the surface of aluminum containing metallic 5 alloy fibers and substrates provides a support structure for many technical, medical and pharmaceutical applications. The novel surface modification of metallic alloy fibers and other metallic substrates involves heating the fiber or substrate in air at temperatures ranging from approximately 800°C to approximately 1000°C for a period of time ranging from approximately 10 hours to approximately 100 hours to form whiskers. The use of a 10 metal oxide coating with large ions, such as zirconium oxide, allows the formation of alumina whiskers while preserving the structural integrity of the metallic alloy substrate. Uses of the present invention include, but are not limited to an advanced catalyst support, a highly efficient filter medium, a support for implants and the like

Method of Forming Functionalized Fly Ash Particles

A method of forming functionalized fly ash particles includes contacting a plurality of fly ash particles with a hydroxide compound under conditions to directly bond oxygen (O) onto a surface portion of the plurality of fly ash particles. The plurality of fly ash particles having O directly bound to their surface portion are reacted with an organic alcohol or an organic acid to covalently bond hydrophobic groups in the form of condensation residue from the organic alcohol or organic acid to the O to form the plurality of functionalized fly ash particles

Biocompatible Nano Rare Earth Oxide Upconverters for Imaging and Therapeutics

Methods and systems for doping cerium oxide and other therapeutically valuable nanoparticles with rare earth ions either singly or in combinations so that infrared light is absorbed and visible light is emitted through the process of up conversion. A novel type of therapeutic nanoparticle with rare earth doping to provide for up conversion emission is invented that makes possible identification, tracking and evaluating the functionality of the nanoparticles and further elucidation of ROS scavenging mechanism. The present invention may be applied to a wide variety of therapeutic agents under investigation

Method for whisker formation on Metallic Fibers and Substrates

A method for whisker formation on the surface of aluminum containing metallic 5 alloy fibers and substrates provides a support structure for many technical, medical and pharmaceutical applications. The novel surface modification of metallic alloy fibers and other metallic substrates involves heating the fiber or substrate in air at temperatures ranging from approximately 800°C to approximately 1000°C for a period of time ranging from approximately 10 hours to approximately 100 hours to form whiskers. The use of a 10 metal oxide coating with large ions, such as zirconium oxide, allows the formation of alumina whiskers while preserving the structural integrity of the metallic alloy substrate. Uses of the present invention include, but are not limited to an advanced catalyst support, a highly efficient filter medium, a support for implants and the like

Functionalized Fly Ash and Oil Scavenging Using the Same

A method of scavenging oil from an oil-water mixture includes providing a plurality of functionalized fly ash particles having functionalized surfaces including reactive groups or reactive materials having hydrophobic groups covalently bound to the reactive groups or reactive materials. The oil-water mixture is contacted with the plurality of functionalzed fly ash paritcles. The plurality of functionalized fly ash particles absorb oil from the oil-water mixture to form oil-laden fly ash particles. The oil-laden fly ash particles can be fed into a combustion process to generate heat from oil absorbed thereon, or absorbed oil from the oil-lade fly ash particles can be separated using a desorption process, and the oil recovered after separating

Defects and symmetry influence on visible emission of Eu doped nanoceria

Europium doped cerium oxide particles of 10 nm were synthesized by room temperature chemical precipitation technique and annealed at 500 and 900 C to study its effect on luminescence. X-ray photoelectron spectroscopic result shows an increase in Ce(3+) concentration from 20% to 23% on Eu doping but decreases to 8% on annealing. Raman studies show a progressive blueshift from 461 to 464 cm(-1) due to local symmetry ordering with temperature. Emission intensity varies with the wavelength of excitation and observed transitions indicate the presence of Eu(3+) in different symmetry environments. (C) 2008 American Institute of Physics

Inhibition of Neovascularization by Cerium Oxide Nanoparticles

The present invention provides methods for reducing, reversing or inhibiting neovascularization of a tissue of a mammalian subject having a pathological condition involving neovascularization by administration in vivo of nanoceria particles (cerium oxide nanoparticles) to the subject. The method of the invention is useful, for example, for reducing, treating, reversing, or inhibiting neovascularization in ocular tissue such as the retina, macula, or the cornea; in skin; in synovial tissue; in intestinal tissue; or in bone. In addition, the method of the invention is useful for reducing or inhibiting neovascularization in a neoplasm (tumors), which can be benign or malignant, where malignant, can be a metastatic neoplasm. As such, the invention provides compositions, which contain nanoceria particles and are useful for reducing, treating, reversing, or inhibiting angiogenesis in a mammalian subject