Abstract: A redox ion exchange membrane may include an electrically-conductive material; and redox-active materials associated with that material, the redox-active materials having reversible oxidation and reduction properties. The redox-active materials may be inorganic nanostructures on the electrically-conductive material. A hydrogen production device and a fuel cell device may include such a redox ion exchange membrane positioned between the cathode and anode.

Abstract: A system and method for generating arsine are disclosed. The system may include a shell having a top interior surface. The system may also include a cathode-anode assembly positioned in the shell and forming an elongated structure substantially parallel to the top surface. The cathode-anode assembly may include a first electrode and a second electrode surrounding the first electrode and forming a gap therebetween. The second electrode may include a plurality of channels along a length of the second electrode. The plurality of channels may allow circulation of electrolyte within and around at least a portion of the cathode-anode assembly and allow gases generated in response to current applied to the cathode-anode assembly to escape from the cathode-anode assembly. Such gases may be used as precursor gases for a high-volume metal-organic chemical vapor deposition (MOCVD) operation.

Abstract: A system and method for generating gas are disclosed. The system may include one or more current sources to generate an electrical current. The system may also include one or more cathode-anode assemblies electrically coupled with the one or more current sources. The one or more cathode-anode assemblies may generate a gas in response to receiving the electrical current from the one or more current sources. Each of the one or more cathode-anode assemblies may include a first electrode and a second electrode forming a concentric cylindrical structure, wherein the second electrode surrounds the first electrode and forms a gap between the second electrode and the first electrode. The system may also include electrolyte provided in the gap.

Abstract: A coated phosphor may comprise: phosphor particles comprised of a phosphor with composition (M)(A)2S4:Eu, wherein: M is at least one of Mg, Ca, Sr and Ba; and A is at least one of Ga, Al, In, Y; a dense impermeable (pinhole-free) coating of an oxide material encapsulating individual ones of the phosphor particles. The coated phosphor is configured to satisfy one or more of the conditions: (1) under excitation by blue light, the reduction in photoluminescent intensity at the peak emission wavelength after 1,000 hours of aging at about 85° C. and about 85% relative humidity is no greater than about 30%; (2) the change in chromaticity coordinates CIE(y), ?CIE y, after 1,000 hours of aging at about 85° C. and about 85 % relative humidity is less than about 5×10?3; (3) said coated phosphor does not turn black when suspended in a 1 mol/L silver nitrate solution for at least two hours at 85° C.

Abstract: A coated phosphor comprises: phosphor particles comprised of a phosphor with composition MSe1?xSx:Eu, wherein M is at least one of Mg, Ca, Sr, Ba and Zn and 0<x<1.0; and a coating on individual ones of the phosphor particles, the coating comprising a layer of oxide material encapsulating the individual phosphor particles; wherein the coated phosphor is configured such that under excitation by a blue LED the reduction in photoluminescent intensity at the peak emission wavelength after 1,000 hours of aging at about 85° C. and about 85% relative humidity is no greater than about 15%; and wherein the coated phosphor is configured such that the change in chromaticity coordinates CIE(x), ?x, after 1,000 hours of aging at about 85° C. and about 85% relative humidity is less than or equal to about 5×10?3.

Abstract: A method of synthesizing activated electrocatalyst, preferably having a morphology of a nanostructure, is disclosed. The method includes safely and efficiently removing surfactants and capping agents from the surface of the metal structures. With regard to metal nanoparticles, the method includes synthesis of nanoparticle(s) in polar or non-polar solution with surfactants or capping agents and subsequent activation by CO-adsorption-induced surfactant/capping agent desorption and electrochemical oxidation. The method produces activated macroparticle or nanoparticle electrocatalysts without damaging the surface of the electrocatalyst that includes breaking, increasing particle thickness or increasing the number of low coordination sites.

Abstract: A process for purifying carbon nanotubes includes mixing a fluid carrier with an oxidizing agent to form an oxidizing solution, and adding the oxidizing solution to a closed container such that the oxidizing solution makes up a fraction of the volume of the container. Carbon nanotubes containing transition metal nanoparticles and carbonaceous impurities are then added to the oxidizing solution to form a carbon nanotube slurry, and the slurry is heated at an elevated temperature not exceeding 110° C. to vaporize at least a portion of the oxidizing agent. Acid is then added to the heated carbon nanotube slurry to dissolve transition metal particles.

Abstract: Graphene-based hybrid films are made by coating electrically conductive nanostructures (such as carbon nanotubes or conductive nanowires) onto a metal substrate, and growing a graphene layer between the nanostructures and the substrate. The nanostructure coating on the substrate yields nucleation sites for the growth of the graphene layer. The process provides hybrid films in which graphene domains are electrically connected by the nanotubes or nanowires. Integral bonds (e.g., chemical bonds) are produced between the nanostructures and the graphene to provide improved electrical conductivity, via contact in excess of van der Waals forces.

Abstract: A method of transferring graphene includes depositing graphene on a side of at least one metal substrate to provide a metal substrate-graphene layer, stacking a target substrate on a side of the metal substrate-graphene layer to provide a stacked structure in which a side of the target substrate faces the graphene layer, and exposing the stacked structure to an electrolysis bath to remove the metal substrate and transfer the graphene onto the side of the target substrate.

Abstract: Carbon nanotube suspensions or dispersions include carbon nanotubes and a functionalized non-native polycyclic aromatic group attached to a surface of the carbon nanotubes. The carbon nanotubes in the suspensions or dispersions are pretreated by exposing the carbon nanotubes to a solvent (such as N-cyclohexyl-2-pyrrolidone), an acid (such as concentrated sulfuric acid), and a non-native polycyclic aromatic group. The carbon nanotubes pretreated according to this method can be dispersed or suspended in a solvent to prepare high concentration suspensions, dispersions and/or inks for various applications.

Abstract: Carbon nanotube suspensions or dispersions include carbon nanotubes and a functional group attached to an aromatic polycyclic compound on a surface of the carbon nanotubes. The carbon nanotubes in the suspensions or dispersions are pretreated by exposing the carbon nanotubes to a solvent (such as N-cyclohexyl-2-pyrrolidone) and an acid (such as concentrated sulfuric acid). The carbon nanotubes pretreated according to this method can be dispersed or suspended in a solvent to prepare high concentration suspensions, dispersions and/or inks for various applications.

Abstract: A method of transferring graphene includes depositing graphene on a side of at least one metal substrate to provide a metal substrate-graphene layer, stacking a target substrate on a side of the metal substrate-graphene layer to provide a stacked structure in which a side of the target substrate faces the graphene layer, and exposing the stacked structure to an electrolysis bath to remove the metal substrate and transfer the graphene onto the side of the target substrate.