Nanoshells and Discrete Polymer-Coated Nanoshells, Methods For Making and Using Same

• US 20080241262A1
• Filed: 03/29/2005
• Published: 10/02/2008
• Est. Priority Date: 03/29/2004
• Status: Abandoned Application

• Current Assignee: University of Houston System
• Original Assignee: University of Houston System
• Inventors: Kim, Jun-Hyun, Lee, T. Randall
• Application Number:
  US10/594,708
• Publication Number:
  US 20080241262A1
• Time in Patent Office: Days
• US Class Current: 424/490
• CPC Class Codes: A61K 9/0009 involving or responsive to electricity, magnetism or acoustic waves; Galenical aspects of sonophoresis, iontophoresis, electroporation or electroosmosis microelectromechanical systems A61K9/0097
• CPC Class Codes: A61K 9/5115 Inorganic compounds
• CPC Class Codes: A61K 9/5138 obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
• CPC Class Codes: A61P 35/00 Antineoplastic agents
• CPC Class Codes: B22F 1/054 Nanosized particles
• CPC Class Codes: B22F 1/0547 Nanofibres or nanotubes
• CPC Class Codes: B22F 1/17 Metallic particles coated with metal
• CPC Class Codes: B22F 1/18 Non-metallic particles coated with metal
• CPC Class Codes: B22F 2998/00 Supplementary information concerning processes or compositions relating to powder metallurgy
• CPC Class Codes: B22F 9/24 starting from liquid metal compounds, e.g. solutions
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer

Abstract

Nano-structures are disclosed that are ideally suited for microelectronics, medical treatment, drug-delivery systems, targeted thermal absorption media, or other similar applications, where the nano-particles include metal oxide nano-particles and metallic nano-particles including a metallic nano-shell or metallic nano-rods deposited on the surface of the nano-particles or nano-shell nano-particles including metallic nano-rods deposited on the surface of the nano-particles and where the nano-structures have a plasmon resonance. For in vivo medical applications, the plasmon resonance is tuned to a tissue-transparent frequency range. Hydrogel-coated nanostructures are also disclosed, which are capable of transitioning between a non-collapsed hydrogel and a collapsed hydrogel via thermal activation induced by electromagnetic irradiation.

Claims

1. A composition comprising a nano-particle core and a nano-structure formed an outer surface of the core, where the nano-particle core comprises a first conductive material and the structure comprises a second conductive material, where the first and second conductive materials are the same or different.

31. The composition of claim 1, wherein the nano-structure is selected from the group consisting of a nano-shell, a plurality of nano-rods and a nano-shell having a plurality of nano-rods disposed on a surface of the nano-shell, where the nano-rods comprise a third conductive material, where the first, second and third conductive materials are the same or different.

32. The composition of claim 1, wherein the first conductive material comprises a first metal, metal alloy or a conductive polymer and the second conductive material comprises a second metal or metal alloy.

33. The composition ofclaim 31, wherein the first conductive material comprises a first metal, metal alloy or a conductive polymer, the second conductive material comprises a second metal or metal alloy, and the third conductive material comprises third metal or metal alloy, where the first, second and third metals and/or metal alloys are the same or different.

34. The composition of claim 32, wherein the first, second and third metals or metal alloys are the same or different noble metals or metal alloys, where the noble metal are selected from the group consisting of gold, silver, platinum, palladium, iridium, osmium, ruthenium, rhodium, and mixtures or combinations thereof.

35. The composition of claim 33, wherein the first, second and third metals or metal alloys are the same or different noble metals or metal alloys, where the noble metal are selected from the group consisting of gold, silver, platinum, palladium, iridium, osmium, ruthenium, rhodium, and mixtures or combinations thereof.

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11. A nano-structure compositioncomprising anano-particle coreand aplurality of nano-rods, where the nano-particle core comprises a first material and the nano-rods comprises a first conductive material.

12. The composition of claim 11, further comprising a nano-shell interposed between the core and the nano-rods where the nano-shell comprises a second conductive material, where the first and second conductive materials are the same or different.

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36. The composition of 1, wherein the first metal and first metal alloy are selected respectively from the group consisting of non-transition metals, non-transition metal alloys, transition metals, transition metal alloys, lanthanide metals, lanthanide metal alloys, actinide metals, and actinide metal alloys.

37. The composition of 31, wherein the first metal and first metal alloy are selected respectively from the group consisting of non-transition metals, non-transition metal alloys, transition metals, transition metal alloys, lanthanide metals, lanthanide metal alloys, actinide metals, and actinide metal alloys.

38. The composition of 1, wherein the nano-structure has a plasmon resonance having a frequency range at least a portion of which lies in the near infrared region of the electromagnetic spectrum.

39. The composition of 31, wherein the nano-structure has a plasmon resonance having a frequency range at least a portion of which lies in the near infrared region of the electromagnetic spectrum.

40. A nano-structure composition comprising a nano-particle core, a nano-structure formed an outer surface of the core and a bio-compatible polymer coating the structure and the core, where the nano-structure is selected from the group consisting of a nano-shell, a plurality of nano-rods and a nano-shell having a plurality of nano-rods disposed on a surface of the nano-shell, where the nano-particle core comprises a first material, the nano-shell comprises a second conductive material, and the nano-rods comprise a third conductive material, where the second and third conductive materials are the same or different.

41. The composition of claim 40, wherein the first material is a non-conductive material, a semi-conductor material or a conductive material.

42. The composition ofclaim 41, wherein the first conductive material comprises a first metal, metal alloy or a conductive polymer, the second conductive material comprises a second metal or metal alloy, and the third conductive material comprises third metal or metal alloy, where the first, second and third metals and/or metal alloys are the same or different.

43. The composition of claim 42, wherein the first, second and third metals or metal alloys are the same or different noble metals or metal alloys, where the noble metal are selected from the group consisting of gold, silver, platinum, palladium, iridium, osmium, ruthenium, rhodium, and mixtures or combinations thereof.

45. The composition of claim 40, wherein the nano-structure has a plasmon resonance having a frequency range at least a portion of which lies in the near infrared region of the electromagnetic spectrum.

44. The composition of 41, wherein the first metal and first metal alloy are selected respectively from the group consisting of non-transition metals, non-transition metal alloys, transition metals, transition metal alloys, lanthanide metals, lanthanide metal alloys, actinide metals, and actinide metal alloys.

46. A nano-structure drug-delivery composition comprising a nano-particle core, a nano-structure, a bio-compatible polymer coating and a pharmaceutically active agent impregnated into the polymer coating, where the nano-structure is selected from the group consisting of a nano-shell, a plurality of nano-rods and a nano-shell having a plurality of nano-rods disposed on a surface of the nano-shell, where the nano-particle core comprises a first material, the nano-shell comprises a second conductive material, and the nano-rods comprise a third conductive material, where the second and third conductive materials are the same or different.

47. A nano-structure drug-delivery composition comprising a nano-particle core, a nano-structure formed on an outer surface of the core, and a pharmaceutically active agent absorbed or attached thereto, where the nano-structure is selected from the group consisting of a nano-shell, a plurality of nano-rods and a nano-shell having a plurality of nano-rods disposed on a surface of the nano-shell, where the nano-particle core comprises a first material, the nano-shell comprises a second conductive material, and the nano-rods comprise a third conductive material, where the second and third conductive materials are the same or different.

48. A method for treating cancers or diseases comprising:

administering a composition to an animal including a human and

exposing the composition to an electromagnetic, magnetic, electrical and/or ultrasonic field so that the nano-structures convert the field into thermal energy,

where the composition comprises a nano-particle core, a nano-structure formed an outer surface of the core and a bio-compatible polymer coating the structure and the core or a pharmaceutically active agent absorbed or attached thereto, where the nano-structure is selected from the group consisting of a nano-shell, a plurality of nano-rods and a nano-shell having a plurality of nano-rods disposed on a surface of the nano-shell, where the nano-particle core comprises a first material, the nano-shell comprises a second conductive material, and the nano-rods comprise a third conductive material, where the second and third conductive materials are the same or different.