A method of preparing a metal nanoparticle on a surface includes subjecting a metal source to a temperature and a pressure in a carrier gas selected to provide a vapor metal species at a vapor pressure in the range of about 10.sup.4 to about 10.sup.11 atm; contacting the vapor metal species with a heated substrate; and depositing the metal as a nanoparticle on the substrate.

The present invention is to provide a method for producing core-shell catalyst particles with high catalytic activity per unit mass of platinum. Disclosed is a method for producing core-shell catalyst particles including a core containing palladium and a shell containing platinum and covering the shell, wherein the method includes: a step of depositing copper on the surface of the palladium-containing particles by applying a potential that is nobler than the oxidation-reduction potential of copper to the palladium-containing particles in a copper ion-containing electrolyte, and a step of forming the shell by, after the copper deposition step and inside the reaction system kept at 3 C. or more and 10 C. or less, substituting the copper deposited on the surface of the palladium-containing particles with platinum by bringing the copper into contact with a platinum ion-containing solution in which platinum ions and a reaction inhibitor that inhibits a substitution reaction between the copper and the platinum, are contained.

A method for decontamination of nitroarenes including fabricating an exemplary nanomotor and chemically reducing nitroarenes of an acidic solution using the exemplary nanomotor. Fabricating the exemplary nanomotor may include depositing a plurality of magnetic nanoparticles on an Au nanosheet and depositing a plurality of zinc (Zn) nanoparticles on the plurality of magnetic nanoparticles. Chemically reducing the nitroarenes of the acidic solution may include generating hydrogen bubbles in the acidic solution by adding the exemplary nanomotor to the acidic solution and guiding the exemplary nanomotor in the acidic solution by applying a magnetic force to the exemplary nanomotor. Generating the hydrogen bubbles in the acidic solution may include reducing hydrogen ions in the acidic solution through a chemical reaction between the hydrogen ions and the plurality of Zn nanoparticles.

A graphene strip includes a plurality of graphene strips, a metal additive and a binding material is provided. The plurality of graphene strips include strips of graphene nanoplatelets. The metal additive is applied to each of the plurality of graphene strips. The binding material couples the plurality of graphene strips together.

A buoyancy device (1) comprises a support structure 2, which can be connected to an underwater application (3) and one or more buoyancy spheres (4) having a specific weight of less than 500 kg/m.sup.3 connected to the support structure (2) and having a light metal spherical shell (5) defining a spherical inner volume (6) and which has an outer diameter (d) greater than 0.5 cm, and a radial thickness (t) greater than 0.08 mm, wherein the spherical shell (5) is obtained in one piece in nano-crystalline metal with an average grain size of less than 1000 nanometers.

The present invention relates to a self-lubricating coating comprising a dispersion made of nanoparticles containing sulfur that are incorporated into a silver matrix, wherein the nanoparticles containing sulfur have the composition Ag.sub.2S and/or Au.sub.2S. The present invention furthermore relates to a self-lubricating coating comprising a dispersion made of fluorinated graphene, and/or carbon nanotube (CNT), and/or carbon nanoparticles of the formula (CF).sub.x incorporated into a silver matrix, wherein the fluorinated graphene, CNT, or carbon nanoparticles of the formula (CF).sub.x have a fluorine to carbon ratio of 1 to 1.25. The present invention furthermore relates to a method for the fabrication of the coating, and an electrical contact which comprises such a coating.

Synthetic brochosomes can be prepared by disposing a monolayer of first polymer microspheres on a substrate and forming a layer of metal on the monolayer of the first polymer microspheres. A monolayer of second polymer microspheres is then disposed on the layer of metal to form a template. The second polymer microspheres are smaller than the first polymer microspheres. A brochosome material is then electrodeposited on the template. The brochosome material is selected from the group consisting of a metal, a metal oxide, a polymer or a hybrid thereof. The first polymer microspheres and the second polymer microspheres are then removed to form a coating of synthetic brochosomes of the brochosome material on the substrate.

The present invention provides articles of manufacture comprising biocompatible nanostructures comprising significantly increased surface area for, e.g., organ, tissue and/or cell growth, e.g., for bone, tooth, kidney or liver growth, and uses thereof, e.g., for in vitro testing of drugs, chemicals or toxins, or as in vivo implants, including their use in making and using artificial tissues and organs, and related, diagnostic, screening, research and development and therapeutic uses, e.g., as drug delivery devices. The present invention provides biocompatible nanostructures with significantly increased surface area, such as with nanotube and nanopore array on the surface of metallic, ceramic, or polymer materials for enhanced cell and bone growth, for in vitro and in vivo testing, cleansing reaction, implants and therapeutics. The present invention provides optically transparent or translucent cell-culturing substrates. The present invention provides biocompatible and cell-growth-enhancing culture substrates comprising elastically compliant protruding nanostructure substrates coated with Ti, TiO.sub.2 or related metal and metal oxide films.

Embodiments of the present disclosure provide a film, a method of preparing the same, and a display panel. The method of preparing the film includes: providing a solution, providing a first electrode and a second electrode, and providing a power source; two poles of the power source are electrically connected to the first electrode and the second electrode, respectively, so that the first electrode have a first electrical property, the second electrode has a second electrical property, first nanomaterials are deposited on a surface of the second electrode, the first monomer materials are cross-linked and polymerized on the surface of the second electrode, so as to form the film on the surface of the second electrode.

A method for forming metal nanoparticles on halloysite nanotubes. The method provides a water-based suspension solution containing about 0.002% to about 0.1% by weight of halloysite nanotubes. The suspension solution is maintained between about 2 C. and about 98 C. and under sufficient mixing that the nanotubes are maintained in substantially constant suspension. At least one positive and at least one negative metal electrode is positioned in the suspension solution, wherein the metal electrodes are at least 98% pure metal. A voltage is maintained across the electrodes of between about 10 and about 300 volts for a time sufficient to form metal ions on at least about 10% of a surface of the halloysite nanotubes.