Low temperature, nanostructured ceramic coatings
AssigneeThe Research Foundation for The State University of New York
InventorJunghyun Cho
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Abstract
A substrate subject to degradation at temperatures above 100° C. is coated with a nanostructured ceramic coating having a thickness in excess of 100 nm, formed on a surface of the substrate, wherein a process temperature for deposition of the nanostructured coating does not exceed 90° C. The coating may be photocatalytic, photovoltaic, or piezoelectric. The coating, when moistened and exposed to ultraviolet light or sunlight, advantageously generates free radicals, which may be biocidal, deodorizing, or assist in degradation of surface deposits on the substrate after use. The substrate may be biological or organic, and may have a metallic or conductive intermediate layer.
Claims19
A nanostructured ceramic coating having a thickness in excess of 100 nm, comprising titanium oxide nanostructures in an amorphous ceramic phase of titanium oxide or zinc oxide nanostructures in an amorphous ceramic phase of zinc oxide, comprising at least one of nanoparticles, nanoblades or nanorods precipitated or grown from an aqueous solution of a ceramic precursor directly on a surface of a polymeric substrate with a maximum temperature of 100° C. during the precipitation of the nanostructures.
A nanostructured ceramic coating comprising:
- a titanium or zinc oxide ceramic crystalline phase within a titanium or zinc oxide ceramic amorphous phase, together having a thickness in excess of 100 nm, formed by a precipitation of at least one of titanium dioxide and zinc oxide nanostructures from a supersaturated aqueous ceramic precursor solution directly onto a polymeric surface in a process having a maximum precipitation temperature below 100° C.
A nanostructured ceramic coating having a thickness in excess of 100 nm, comprising photocatalytic crystalline, nanorod or nanotube ceramic nanostructures within an amorphous ceramic phase, formed directly on a polymeric surface from an aqueous solution of ceramic precursors at a temperature of less than 100° C. without damaging the polymeric surface.
Dependencies are inferred from the claim text.