Fabrication of light emitting film coated fullerenes and their application for in-vivo light emission

• US 20080171204A1
• Filed: 08/06/2007
• Published: 07/17/2008
• Est. Priority Date: 11/19/2002
• Status: Active Grant

• Current Assignee: NewCyte, Inc. (Natcore Technology, Inc.), Rice University
• Original Assignee: Rice University
• Inventors: Barron, Andrew R., Loscutova, John R., Flood, Dennis J.
• Granted Patent: US 7,682,527 B2
• Time in Patent Office: Days
• US Class Current: 428/403
• CPC Class Codes: B82Y 15/00 Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors
• 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: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 32/15 Nano-sized carbon materials
• CPC Class Codes: C01B 32/156 After-treatment
• CPC Class Codes: C30B 19/12 characterised by the substrate
• CPC Class Codes: C30B 29/48 AIIBVI compounds wherein A is Zn, Cd or Hg, and B is S, Se or Te
• CPC Class Codes: C30B 29/605 Products containing multiple oriented crystallites, e.g. columnar crystallites
• CPC Class Codes: C30B 7/14 the crystallising materials being formed by chemical reactions in the solution
• CPC Class Codes: G02B 6/32 having lens focusing means positioned between opposed fibre ends with lens being an integral part of the single fibre end G02B6/262
• CPC Class Codes: H01L 21/02376 Carbon, e.g. diamond-like carbon
• CPC Class Codes: H01L 21/02521 Materials
• CPC Class Codes: H01L 21/02601 Nanoparticles fullerenes H10K85/211
• CPC Class Codes: H01L 21/02628 using solutions
• CPC Class Codes: Y10S 977/70 Nanostructure
• CPC Class Codes: Y10S 977/734 Fullerenes, i.e. graphene-based structures, such as nanohorns, nanococoons, nanoscrolls or fullerene-like structures, e.g. WS2 or MoS2 chalcogenide nanotubes, planar C3N4, etc.
• CPC Class Codes: Y10S 977/737 having a modified surface
• CPC Class Codes: Y10S 977/742 Carbon nanotubes, CNTs
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/30 : Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

A nanoparticle coated with a semiconducting material and a method for making the same. In one embodiment, the method comprises making a semiconductor coated nanoparticle comprising a layer of at least one semiconducting material covering at least a portion of at least one surface of a nanoparticle, comprising: (A) dispersing the nanoparticle under suitable conditions to provide a dispersed nanoparticle; and (B) depositing at least one semiconducting material under suitable conditions onto at least one surface of the dispersed nanoparticle to produce the semiconductor coated nanoparticle. In other embodiments, the nanoparticle comprises a fullerene. Further embodiments include the semiconducting material comprising CdS or CdSe.

Claims

1-27. -27. (canceled)

28. A method of fabricating a coated fullerene, comprising

activating at least a surface portion of a fullerene, and

catalyzing growth of a semiconducting material on said activated portion so as to coat said fullerene at least partially with said semiconducting material.

29. The method of claim 28, wherein said activating step comprises generating one or more reactive sites for growth of said semiconducting material.

30. The method of claim 29, wherein said reactive sites comprise hydroxide groups chemically bound to said surface portion of the fullerene.

31. A method of fabricating coated nanoparticles, comprising

dispersing a plurality of nanoparticles in a liquid so as to functionalize at least a surface portion of one or more of said nanoparticles, and

depositing a semiconducting material on said functionalized surface portion of said one or more nanoparticles.

32. A method of depositing semiconducting material on a fullerene, comprising

chemically functionalizing at least a surface portion of a fullerene disposed in a liquid, and

catalyzing growth of a semiconducting material on the functionalized surface portion.

33. The method of claim 32, wherein the functionalizing step comprises reacting said surface portion with one or more reagents to generate at least one reactive site for growth of the semiconducting material.

34. The method of claim 33, wherein said active site comprises one or more hydroxide groups.

35. The method of claim 32, further comprising the step of adding a surfactant to said liquid so as to disperse the fullerene therein.

36. The method of claim 32, wherein the step of catalyzing growth comprises contacting said fullerene with chemical precursors to the semiconducting material.

37. The method of claim 32, further comprising adding a capping agent to said liquid to control surface growth of the semiconducting material.

38. The method of claim 33, further comprising continuing to react said surface portion with said reagents until a thickness of the semiconducting material grown on the fullerene lies in a range of about 100 nm to about 5000 nm.

39. The method of claim 38, further comprising quenching said reaction when a desired thickness of the semiconducting material is achieved.

40. A nanoparticle, comprising:

a core formed at least in part of a fullerene, and

a semiconducting material at least partially coating said core, wherein said semiconductor coating has a thickness in a range of about 100 nm to about 5000 nm.

41. The semiconductor coated nanoparticle of claim 40, wherein the fullerene comprises at least one of C₆₀ molecules, C₇₂ molecules, C₈₄ molecules, C₉₆ molecules, C₁₀₈ molecules, ovoid molecules, C₁₂₀ molecules, single-walled carbon nanotubes, and multi-walled carbon nanotubes.

42. The semiconductor coated nanoparticle of claim 40, wherein the fullerene comprises a surface modified fullerene.

43. The semiconductor coated nanoparticle of claim 40, wherein the semiconductor coating comprises at least one of photonic bandgap engineered materials;

III-V and II-VI binary, ternary, and quaternary compound semiconductors;

metallic oxides;

polymers;

liquid crystals; and

suitable organic compounds.

44. The semiconductor coated nanoparticle of claim 40, wherein the semiconductor coating comprises at least one of ZnS, CdS, CdSe, GaAs, InP, GaS, TiO₂, and Fe₂S₃.

45. The semiconductor coated nanoparticle of claim 40, wherein the semiconductor coating comprises at least one of CdS and CdSe.

46. The semiconductor coated nanoparticle of claim 40, wherein the semiconductor coating is capable of at least one of absorbing and emitting light.

47. A solution, comprising:

a liquid for functionalizing at least a surface of a portion of fullerenes to facilitate growth of a semiconductor material thereon; and

a plurality of fullerenes immersed in the liquid.

48. The solution of claim 47, further comprising chemical precursors for catalyzing the growth of the semiconductor material on at least a portion of the surfaces of the plurality of fullerenes.

49. The solution of claim 48, further comprising a capping agent to control growth of the semiconductor material.

50. The solution of claim 47, wherein the plurality of fullerenes are at least partially dissolved in the liquid.

51. The solution of claim 47, wherein the plurality of fullerenes are dispersed in the liquid.

52. A composition, comprising,

a fullerene;

a functionalizing group disposed on at least a portion of a surface of the fullerene; and

a semiconducting material disposed on at least the portion of the surface the fullerene that includes the functionalizing group.

53. The composition of claim 52, wherein the semiconducting material has a thickness in a range of about 100 nm to about 5000 nm.

54. The composition of claim 52, wherein the functionalizing group provides at least one reactive site for growth of the semiconducting material.

55. The composition of claim 52, wherein the functionalizing group is suitable for dispersing the nanoparticle in a liquid.