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US 7,736,693 B2Granted
Nano-powder-based coating and ink compositions
AssigneeCima NanoTech Israel Ltd.
InventorsArkady Garbar, Fernando De La Vega, Einat Matzner, Chariana Sokolinsky, Valery Rosenband, Anatoly Kiselev, Dmitry Lekhtman
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Abstract
Nano-powder-based coating and ink compositions, methods for producing and using these compositions, and articles prepared from these compositions are described.
Claims43
A method of producing an article comprising:
- (a) providing a composition comprising nano-particles dispersed in a liquid carrier
- comprising (a) water, a water-miscible organic solvent, or combination thereof and (b) an organic solvent that evaporates more quickly than the water, water-miscible organic solvent, or combination thereof,
- wherein the combination of (a) the water, water-miscible organic solvent, or combination thereof and (b) the organic solvent that evaporates more quickly than the water, water-miscible solvent, or combination thereof, together form an emulsion;
- (b) applying the composition to a surface of a substrate;
- and
- (c) drying the composition to remove the liquid carrier, whereupon the nano-particles self-assemble to form a transparent and electrically conductive coating in the form of a network-like pattern that includes interconnected traces defining randomly shaped cells on the surface of the substrate,
- wherein the coating is transparent to light at wavelengths in the range of 400 to 700 nm.
4 more elements
A method of producing an article comprising:
- (A) providing an emulsion comprising nano-particles dispersed in a liquid carrier that includes (a) water, a water-miscible organic solvent, or combination thereof and (b) an organic solvent that evaporates more quickly than the water, water-miscible solvent, or combination thereof,
- wherein the combination of (a) the water, water-miscible organic solvent, or combination thereof and (b) the organic solvent that evaporates more quickly than the water, water-miscible solvent, or combination thereof, together form the emulsion,
- wherein the nano-particles have a D90 value of less than 0.1 μm and are prepared according to a process comprising:
- (i) forming an alloy comprising aluminum and a metal;
- and
- (ii) treating the alloy with a leaching agent to remove the aluminum;
- (B) applying the composition to a surface of a substrate;
- (C) drying the composition to remove the liquid carrier, whereupon the nano-particles self-assemble to form an article comprising the nano-particles in the form of an electrically conductive network on the surface of the substrate;
- and
- (D) sintering the nano-particles at a temperature no greater than 50° C. in the presence of an organic acid following application to the surface of the substrate,
- wherein the network is transparent to light at wavelengths in the range of 400 to 700 nm and has an electrical resistance of 0.1 Ω/square to 1,000 Ω/square.
8 more elements
Dependencies are inferred from the claim text.