This invention is a commercially manufactured article of manufacture (such as a shoulder patch) comprising an infrared (IR) phosphorescent material that emits in the IR wavelength range (e.g., from approximately seven-hundred nanometers (˜700 nm) to approximately one millimeter (˜1 mm)) after being excited by incident wavelengths of between ˜100 nm and ˜750 nm (or visible light). In other words, once the material has been exposed to visible light, the material will continue to emit in the IR wavelength range for a period of time, even when the material is no longer exposed to the visible light.

There is provided a piezoelectric composite comprising a piezoelectric polymer and particles of a filler dispersed in the polymer, wherein the filler is in micro or nanoparticle form and is present in a filler:polymer weight ratio between about 1:99 and about 95:5. There is also provided an ink and ink cartridge for 3D printing of the piezoelectric composite. There is also provided a piezoelectric 3D printed material comprising the piezoelectric composite and a bifunctional material comprising the piezoelectric composite with one or more conductive electrodes adjacent to the piezoelectric composite. Methods of manufacture and uses thereof are also provided, including methods for 3D printing of a piezoelectric 3D printed material via solvent-cast or FDM 3D printing starting from the piezoelectric composite and/or the ink.

There is provided a piezoelectric composite comprising a piezoelectric polymer and particles of a filler dispersed in the polymer, wherein the filler is in micro or nanoparticle form and is present in a filler:polymer weight ratio between about 1:99 and about 95:5. There is also provided an ink and ink cartridge for 3D printing of the piezoelectric composite. There is also provided a piezoelectric 3D printed material comprising the piezoelectric composite and a bifunctional material comprising the piezoelectric composite with one or more conductive electrodes adjacent to the piezoelectric composite. Methods of manufacture and uses thereof are also provided, including methods for 3D printing of a piezoelectric 3D printed material via solvent-cast or FDM 3D printing starting from the piezoelectric composite and/or the ink.

Provided is a semiconductor nanoparticle complex composition and the like in which a semiconductor nanoparticle complex is dispersed at a high concentration and which has high fluorescence quantum yield. A semiconductor nanoparticle complex composition in which a semiconductor nanoparticle complex is dispersed in a dispersion medium, wherein: the semiconductor nanoparticle complex has a semiconductor nanoparticle and a ligand coordinated to the surface of the semiconductor nanoparticle; the ligand includes an organic group; the dispersion medium is a monomer or a prepolymer; the semiconductor nanoparticle complex composition further includes a crosslinking agent; and a mass fraction of the semiconductor nanoparticle in the semiconductor nanoparticle complex composition is 30% by mass or more.

Disclosed is a particulate water-absorbent resin composition containing at least one selected from the group consisting of a microporous inorganic material, silver, and a silver compound, and a polymer particle, in which the polymer particle contains an inorganic reducing agent.

An electrode comprising KVOPO.sub.4 as an active ingredient, wherein the electrode is capable of electrochemical insertion and release of alkali metal ions, e.g., sodium ions. The KVOPO.sub.4 may be milled to carbon particles to increase conductivity. A method of forming an electrode is provided, comprising milling a mixture of ammonium metavanadate, ammonium phosphate monobasic, and potassium carbonate; heating the milled mixture to a reaction temperature, and holding the reaction temperature until a solid phase synthesis of KVOPO.sub.4 occurs; milling the KVOPO.sub.4 together with conductive particles to form a conductive mixture of fine particles; and adding binder material to form a conductive cathode. A sodium ion battery is provided having a conductive KVOPO.sub.4 cathode, a sodium ion donor anode, and a sodium ion transport electrolyte. The VOPO.sub.4, preferably has a volume greater than 90 Å.sup.3 per VOPO.sub.4.

An electrode comprising KVOPO.sub.4 as an active ingredient, wherein the electrode is capable of electrochemical insertion and release of alkali metal ions, e.g., sodium ions. The KVOPO.sub.4 may be milled to carbon particles to increase conductivity. A method of forming an electrode is provided, comprising milling a mixture of ammonium metavanadate, ammonium phosphate monobasic, and potassium carbonate; heating the milled mixture to a reaction temperature, and holding the reaction temperature until a solid phase synthesis of KVOPO.sub.4 occurs; milling the KVOPO.sub.4 together with conductive particles to form a conductive mixture of fine particles; and adding binder material to form a conductive cathode. A sodium ion battery is provided having a conductive KVOPO.sub.4 cathode, a sodium ion donor anode, and a sodium ion transport electrolyte. The VOPO.sub.4, preferably has a volume greater than 90 Å.sup.3 per VOPO.sub.4.

A composite material comprising a metallic substrate and a coating on at least one side of the metallic substrate, wherein the coating comprises an acrylic or styrene-acrylic based polymer and is less than about 0.2 mils thick, wherein the polymer has a molecular weight of 50,000 to 1,000,000, a glass transition temperature (Tg) of 50-80° C., and comprises 90-100 wt. % of the total solids in the coating. The method of applying a coating to a metal substrate using a manifold flood and squeegee roll configuration or alternatively roll coater techniques; wherein the roll hardness, shape, pressure and speed are chosen to ensure that the coating composition forms a continuous wet film on the metallic substrate surfaces when the strip travels at up to 600 feet per minute; and the wet film has a uniform thickness of 2 mil (0.002 inch) or less.

Methods of protecting a propeller include applying an inner polymer layer onto a propeller. The inner polymer layer is impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that does not chemically or galvanically interact with a material of the propeller. An outer polymer layer is applied onto the inner polymer layer, the outer polymer layer being impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that repels biofouling organisms to prevent invasion of the inner polymer layer.

Methods of protecting a propeller include applying an inner polymer layer onto a propeller. The inner polymer layer is impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that does not chemically or galvanically interact with a material of the propeller. An outer polymer layer is applied onto the inner polymer layer, the outer polymer layer being impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that repels biofouling organisms to prevent invasion of the inner polymer layer.