Particles including nanoparticles, uses thereof, and methods

• US 9,365,701 B2
• Filed: 03/07/2012
• Issued: 06/14/2016
• Est. Priority Date: 09/09/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: QD Vision, Inc. (Samsung Electronics Co. Ltd.)
• Inventors: Nick, Robert J., Linton, John R.
• Primary Examiner(s): CAIN, EDWARD J
• Application Number:
  US13/414,417
• Publication Number:
  US 20120256141A1
• Time in Patent Office: 1,560 Days
• Field of Search: 523/210, 252/301.36
• US Class Current: 1/1
• CPC Class Codes: C08K 9/10 Encapsulated ingredients
• CPC Class Codes: C09D 5/22 Luminous paints luminescent compositions C09K11/00
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/565 with zinc cadmium
• CPC Class Codes: C09K 11/70 containing phosphorus

Abstract

A particle comprising nanoparticles encapsulated within a host material is disclosed, wherein the particle includes a coating disposed over at least a portion of the outer surface of the particle. In certain embodiments, nanoparticles have light-emissive properties. In certain embodiments, the coating covers all or substantially all of the outer surface of the particle. The coating can comprise a resin having low oxygen permeability. In certain embodiments, the coating comprises a polyvinyl alcohol compound. In certain embodiments, the coating comprises a polyvinylidene dichloride compound. Other embodiments relate to a powder comprising a particle of the invention, a composition including a particle of the invention, a formulation including a particle of the invention, a coating comprising a particle of the invention, a method for making a particle of the invention, and products and applications including a particle of the invention. In preferred embodiments, a nanoparticle comprises a semiconductor nanocrystal.

Claims

1. A particle comprising nanoparticles having light-emissive properties included in a solid host material, wherein the host material has characteristics which protect the nanoparticles from environmental factors including oxygen and water, wherein the particle includes a coating over at least a portion of the outer surface of the particle and wherein the coating comprises a resin with low oxygen permeability, wherein the coating has a thickness in a range from about 0.1 to about 10 microns.

2. A particle in accordance with claim 1 wherein the resin comprises a polyvinyl alcohol compound, wherein the polyvinyl alcohol compound is substituted or unsubstituted.

3. A particle in accordance with claim 1 wherein the resin comprises polyvinylidene dichloride compound, wherein the polyvinylidene dichloride compound is substituted or unsubstituted.

4. A particle in accordance with claim 1 wherein the coating has a thickness of at least 0.1 micron.

5. A particle in accordance with claim 1 wherein the particle has at least one dimension in the range from about 0.01 μ

m to about 100 μ

m.

6. A particle in accordance with claim 1 wherein the particle includes at least about 0.001 weight percent nanoparticles.

7. A particle in accordance with claim 1 wherein the particle includes from about 0.001 to about 25 weight percent nanoparticles.

8. A particle in accordance with claim 1 wherein the host material comprises a polymer.

9. A particle in accordance with claim 1 wherein the host material comprises a wax.

10. A particle in accordance with claim 1 wherein the host material is optically transparent to excitation light used to optically excite the nanoparticles.

11. A particle in accordance with claim 1 wherein the host material is optically transparent to light emitted from the light-emissive nanoparticles.

12. A particle in accordance with claim 11 wherein the host material is optically transparent to light emitted from the light-emissive nanoparticles.

13. A particle in accordance with claim 1 wherein at least a portion of the nanoparticles include a core comprising a first semiconductor material and a shell disposed over at least a portion of an outer surface of the core, the shell comprising a second semiconductor material.

14. A particle in accordance with claim 1 wherein at least a portion of the nanoparticles includes one or more ligands attached to an outer surface thereof.

15. A composition comprising one or more particles in accordance with claim 1 dispersed in a second host material.

16. A composition in accordance with claim 15 wherein the second host material comprises a polymer.

17. A composition in accordance with claim 15 wherein the second host material comprises a monomer.

18. A composition in accordance with claim 15 wherein the second host material comprises a second resin.

19. A particle in accordance with claim 1 wherein the host material comprises polyacrylate.

20. A particle in accordance with claim 1 wherein the host material comprises polymethacrylate.

21. A particle in accordance with claim 1 wherein the host material comprises polylaurylmethacrylate.

22. A particle in accordance with claim 1 wherein the host material comprises an inorganic material.

23. A coating comprising a film prepared from a plurality of particles in accordance with claim 1.

24. A particle in accordance with claim 1 wherein the nanoparticles comprise semiconductor nanocrystals.

25. A particle in accordance with claim 1 wherein the coating covers all of the outer surface of the of the particle.

26. A particle in accordance with claim 1 wherein the host material is highly cross-linked and encapsulates the nanoparticles, and wherein the coating provides a water and oxygen barrier layer covering the outer surface of the particle.

27. A particle in accordance with claim 1 wherein the nanoparticles include two or more types of light-emissive nanoparticles that emit light at the same or different wavelengths.

28. A composition in accordance with claim 15 wherein the host material is highly cross-linked and encapsulates the nanoparticles, and wherein the coating provides a water and oxygen barrier layer covering the outer surface of the particle.

29. A coating comprising a particle comprising nanoparticles having light-emissive properties included in a solid host material, wherein the host material has characteristics which protect the nanoparticles from environmental factors including oxygen and water, wherein the nanoparticles comprise semiconductor nanocrystals, and wherein the particle includes a particle coating over at least a portion of the outer surface of the particle and wherein the particle coating comprises a resin with low oxygen permeability, wherein the particle coating has a thickness in a range from about 0.1 to about 10 microns.

30. A coating in accordance with claim 29 wherein the coating further comprises one or more monomers, polymers, resins, and/or other film forming compositions.

31. A coating in accordance with claim 29 wherein the coating further includes one or more additives.

32. A coating in accordance with claim 31 wherein the one or more additives comprise a colorant, a scatterer, a binder, a surfactant, a UV absorber, and/or a mixture of one or more thereof.

33. A coating in accordance with claim 29 wherein the particle coating covers all of the outer surface of the of the particle.

34. A coating in accordance with claim 29 wherein the host material is highly cross-linked and encapsulates the nanoparticles, and wherein the particle coating provides a water and oxygen barrier layer covering the outer surface of the particle.

35. A coating in accordance with claim 29 wherein the nanoparticles include two or more types of light-emissive nanoparticles that emit light at the same or different wavelengths.

36. A coating in accordance with claim 29 wherein the resin comprises a polyvinyl alcohol compound, wherein the polyvinyl alcohol compound is substituted or unsubstituted.

37. A coating in accordance with claim 29 wherein the resin comprises polyvinylidene dichloride compound, wherein the polyvinylidene dichloride compound is substituted or unsubstituted.

38. A coated particle including a particle comprising nanoparticles having light-emissive properties included in a solid host material, wherein the host material has characteristics which protect the nanoparticles from environmental factors including oxygen and water, wherein the particle has a size in a range from about 0.01 to about 100 microns, and a coating over at least a portion of the outer surface of the particle, the coating comprising a resin with low oxygen permeability, wherein the coating has a thickness of about 10 microns or less.

39. A coated particle in accordance with claim 38 wherein the resin comprises a polyvinyl alcohol compound, wherein the polyvinyl alcohol compound is substituted or unsubstituted.

40. A coated particle in accordance with claim 38 wherein the resin comprises polyvinylidene dichloride compound, wherein the polyvinylidene dichloride compound is substituted or unsubstituted.