A lithium-air battery catalyst having a 1D polycrystalline tubes structure of a ruthenium oxide-manganese oxide complex includes the ruthenium oxide-manganese oxide complex having at least one polycrystalline tubes structure among a core fiber-shell patterned nanotubes structure and a double walls patterned composite double tubes structure, and the ruthenium oxide-manganese oxide complex is formed as an air electrode catalyst.

A method is disclosed including causing a preform 1 that is softened to pass from an inner side of a container-shaped member 10 having a shape of a container having a through hole 12 at a bottom thereof through the through hole 12. The preform 1 includes a resin. At least an inner surface 10i of the container-shaped member 10 is formed of a material including glass, a heat-resistant resin, or aluminum as a main component. In one embodiment of the present invention, the preform 1 is heated while the preform 1 and a metallic member 20 in which the container-shaped member 10 is disposed are not in direct contact with each other, and the preform 1 softened thereby is caused to pass through the through hole 12 and then through a tubular portion 26 of the metallic member 20 to shape the preform 1 into a fibrous shape.

A method for preparing a palladium-loaded heterojunction composite framework aerogel, including: preparing a hollow tin dioxide (SnO.sub.2) nanofiber; preparing a tetrabutyl titanate-hollow SnO.sub.2 nanofiber mixed solution; preparing a palladium dichloride (PdCl.sub.2) precursor solution; adding the PdCl.sub.2 precursor solution to the tetrabutyl titanate-hollow SnO.sub.2 nanofiber mixed solution to form a heterojunction double-network composite framework gel; and preparing a palladium nanoparticle-loaded heterojunction double-network composite framework aerogel. A method for preparing a hydrogel sensor coated with the palladium-loaded heterojunction composite framework aerogel is also provided herein.

Disclosed is a method for preparing a quantum rod/polymer fiber membrane by using electrospinning technique. The method comprises the following steps: (1) preparing a quantum rod solution; (2) preparing a polymer solution, and adding the quantum rod solution obtained in step (1) into the polymer solution so as to form an electrospinning precursor solution with a volume concentration of the quantum rods of 5%-80%; and (3) adding the electrospinning precursor solution into an electrospinning device, regulating the voltage of a generator and the receiving distance, and then performing electrospinning to prepare the quantum rod/polymer fiber membrane. By adjusting the concentration of the quantum rod solution and parameters in the electrospinning process, the method realizes directional arrangements of the quantum rods in the electrospinning process, thereby obtaining the quantum rod/polymer fiber membrane with high degree of polarization performance.

The present disclosure is directed to an enzyme delivery system having a plurality of solution spun fibers. The solution spun fibers made from a water soluble polymeric resin and an enzyme. The enzyme is encapsulated in the solution spun fibers and is present in an amount from 0.1 to 40 wt % based on total weight of the solution spun fibers. The percent of active enzyme after encapsulation is from 50 to 100%.

The present disclosure is directed to an enzyme delivery system having a plurality of solution spun fibers. The solution spun fibers made from a water soluble polymeric resin and an enzyme. The enzyme is encapsulated in the solution spun fibers and is present in an amount from 0.1 to 40 wt % based on total weight of the solution spun fibers. The percent of active enzyme after encapsulation is from 50 to 100%.

An article includes a substrate, a ceramic barrier coating, and a layer of networked ceramic nanofibers. The ceramic barrier coating is disposed on the substrate and has a porous columnar microstructure. The layer of networked ceramic nanofibers is disposed on the ceramic barrier layer and seals the pores of the porous columnar microstructure.

A fiber can be made having a structure with an axial core and a coating layer. The fiber can have a polymer core and one or two layers surrounding the core. The fine fiber can be made from a polymer material and a resinous aldehyde composition such that the general structure of the fiber has a polymer core surrounded by at least a layer of the resinous aldehyde composition.

A fiber can be made having a structure with an axial core and a coating layer. The fiber can have a polymer core and one or two layers surrounding the core. The fine fiber can be made from a polymer material and a resinous aldehyde composition such that the general structure of the fiber has a polymer core surrounded by at least a layer of the resinous aldehyde composition.

Described herein is a method of in situ production of supported nanoparticles using centrifugal spinning to provide a composite fiber structure of polymer or carbon fibers having nanoparticles disposed on the surface. The nanoparticles may be salt particles or elemental metal particles.