Articles comprising self-assembled layers comprising nanoparticles with a phosphorous surface treatment

• US 10,365,415 B2
• Filed: 12/17/2014
• Issued: 07/30/2019
• Est. Priority Date: 12/19/2013
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Schmidt, Daniel J.
• Primary Examiner(s): Sample, David
• Application Number:
  US15/103,948
• Publication Number:
  US 20160320533A1
• Time in Patent Office: 1,686 Days
• Field of Search: None
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: G02B 1/005 made of photonic crystals or photonic band gap materials photonic band-gap structures or photonic lattices in integrated optics G02B6/1225; photonic band-gap structures or photonic lattices in optical fibres G02B6/02295
• CPC Class Codes: G02B 1/105 Protective coatings
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02B 2207/101 Nanooptics
• CPC Class Codes: G02B 5/0816 Multilayer mirrors, i.e. having two or more reflecting layers G02B5/0883, G02B5/0891 take precedence
• CPC Class Codes: G02B 5/0841 comprising organic materials, e.g. polymers
• CPC Class Codes: G02B 5/0891 Ultraviolet [UV] mirrors apparatus for microlithography exposure G03F7/70; X-ray multilayer structures G21K1/06
• CPC Class Codes: G02B 5/287 comprising at least one layer of organic material
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001

Abstract

An article is described comprising a substrate and a plurality of layers deposited by layer-by-layer self-assembly disposed on the substrate. A portion of the layers comprise inorganic oxide nanoparticles comprising a phosphorous-containing surface treatment. Also described is an article comprising a bi-layer, the bi-layer comprises a monolayer of a polycation and a monolayer of a polyanion. The polyanion comprises inorganic oxide nanoparticles comprising a phosphorous-containing surface treatment. The polycations may be a polyelectrolyte or inorganic oxide nanoparticles.

Claims

1. An article comprising

a substrate;

a plurality of layers deposited by layer-by-layer self-assembly disposed on the substrate, where a portion of the layers comprise a polycation and a polyanion and the polyanion comprises inorganic oxide nanoparticles comprising a phosphorous-containing surface treatment.

2. The article of claim 1 wherein the inorganic oxide nanoparticles comprising the phosphorous-containing surface treatment comprise at least two negatively charged groups.

3. The article of claim 1 wherein the plurality of layers have a refractive index of at least 1.60.

4. The article of claim 3 wherein the inorganic oxide nanoparticles comprise titania, zirconia, alumina, antimony oxide, ceria, zinc oxide, lanthanum oxide, tantalum oxide, mixed metal oxides thereof, and mixtures thereof.

5. The article of claim 4 wherein the inorganic oxide nanoparticles comprise zirconia.

6. The article of claim 1 wherein the phosphorous-containing surface treatment is a phosphorous-containing acid or salt thereof.

7. The article of claim 1 wherein the phosphorous-containing surface treatment is an organophosphorous acid or salt thereof.

8. The article of claim 1 wherein the phosphorous-containing surface treatment comprises at least two negatively charged groups.

9. The article of claim 8 wherein at least one of the negatively charged groups is a negatively charged phosphorous-containing group.

10. The article of claim 1 wherein the phosphorous-containing surface treatment is an acid having the general structure

11. The article of claim 1 wherein the layers comprising the inorganic oxide nanoparticles comprising the phosphorous-containing surface treatment are alternated with layers comprising a polycation forming a bi-layer.

12. The article of claim 11 wherein the polycation is a polyelectrolyte that is not a phosphorous-containing material.

13. The article of claim 11 wherein the polycation comprises inorganic nanoparticles lacking the phosphorous-containing surface treatment.

14. The article of claim 10 wherein the bi-layer has a refractive index of at least 1.40.

15. The article of claim 1 wherein the substrate is a light transmissive inorganic or organic polymeric material.

16. The article of claim 1 wherein the substrate is an optical film, architectural film, greenhouse film, window film, protection film, fenestration product, solar light tube film, traffic signage film, commercial graphics film, a solar photovoltaic front-sheet film, a solar power concentrating mirror, or light transmissive cover of a light bulb.

17. An article comprising a bi-layer comprising a monolayer of a polycation and a monolayer of a polyanion, wherein the polyanion comprises inorganic oxide nanoparticles comprising a phosphorous-containing surface treatment.