US2015191648A1PendingUtilityA1

Surface-Modified Nanoparticles

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Assignee: NANOCO TECHNOLOGIES LTDPriority: Jan 6, 2014Filed: Dec 22, 2014Published: Jul 9, 2015
Est. expiryJan 6, 2034(~7.5 yrs left)· nominal 20-yr term from priority
Inventors:Cong-Duan VoHao PangImad Naasani
C09K 11/08C08J 5/18C09K 11/025C09K 11/54C09K 11/565C08K 9/04C08L 2205/025C09K 11/02C08L 2203/16C09K 11/883C08J 2363/00C09K 11/885C08L 63/00C08K 3/00
59
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Claims

Abstract

The surfaces of nanoparticles (QDs) are modified with amphiphilic macromolecules, for example, amphiphilic copolymers. The surface modification renders the QDs more compatible with oxygen-excluding matrices, such as epoxy resin, polyurethane resin, polyester resins or any hydrophilic inorganic/organic hybrid resin such as (meth)acrylate-functionalized polyhedral oligomeric silsesquioxane (POSS).

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A surface-modified nanoparticle comprising:
 a nanoparticle having a core and an external surface;   a plurality of amphiphilic macromolecules on the external surface.   
     
     
         2 . The surface-modified nanoparticle recited in  claim 1  wherein the amphiphilic macromolecules are adsorbed on the external surface of the nanoparticle. 
     
     
         3 . The surface-modified nanoparticle recited in  claim 1  wherein the amphiphilic macromolecules have a first, polar portion and a second, non-polar portion. 
     
     
         4 . The surface-modified nanoparticle recited in  claim 1  wherein the nanoparticle is a metal oxide. 
     
     
         5 . The surface-modified nanoparticle recited in  claim 4  wherein the nanoparticle is selected from the group consisting of: iron oxides, titanium oxides, zinc oxide, zirconium oxide, and aluminum oxide. 
     
     
         6 . The surface-modified nanoparticle recited in  claim 1  wherein the nanoparticle is a magnetic nanoparticle. 
     
     
         7 . The surface-modified nanoparticle recited in  claim 1  wherein the nanoparticle is a gold nanoparticle. 
     
     
         8 . The surface-modified nanoparticle recited in  claim 1  wherein the nanoparticle is a silver nanoparticle. 
     
     
         9 . The surface-modified nanoparticle recited in  claim 1  wherein the nanoparticle comprises a luminescent semiconductor material. 
     
     
         10 . The surface-modified nanoparticle recited in  claim 1  wherein the nanoparticle is selected from the group consisting of: CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, InP, InAs, InSb, AlP, AlS, AlAs, AlSb, GaN, GaP, GaAs, GaSb, PbS, PbSe, Si, Ge and combinations thereof. 
     
     
         11 . The surface-modified nanoparticle recited in  claim 1  wherein the nanoparticle is a cadmium-free nanoparticle. 
     
     
         12 . The surface-modified nanoparticle recited in  claim 1  wherein the nanoparticle is a core-shell nanoparticle wherein the core is substantially comprised of a first material and the shell is substantially comprised of a second material different from the first material. 
     
     
         13 . The surface-modified nanoparticle recited in  claim 12  wherein the core-shell nanoparticle comprises a plurality of shells with adjacent shells substantially comprised of different materials. 
     
     
         14 . The surface-modified nanoparticle recited in  claim 12  wherein the core-shell nanoparticle comprises a shell material selected from the group consisting of ZnS, ZnO, MgS, MgSe, MgTe and GaN. 
     
     
         15 . The surface-modified nanoparticle recited in  claim 12  wherein the core-shell nanoparticle comprises a core comprised substantially of InP, first shell comprised substantially of ZnS, and a second shell comprised substantially of ZnO. 
     
     
         16 . The surface-modified nanoparticle recited in  claim 1  wherein the amphiphilic macromolecules comprise a block copolymer. 
     
     
         17 . The surface-modified nanoparticle recited in  claim 16  wherein the block copolymer comprises a first block having an affinity for the external surface of the nanoparticle. 
     
     
         18 . The surface-modified nanoparticle recited in  claim 17  wherein the block copolymer comprises a second block that is more polar than the first block. 
     
     
         19 . The surface-modified nanoparticle recited in  claim 17  wherein the block copolymer comprises a second block that has affinity for an epoxide resin. 
     
     
         20 . The surface-modified nanoparticle recited in  claim 16  wherein the block copolymer comprises a first block that incorporates at least two monomers each of which including at least one atom having affinity for the nanoparticle surface. 
     
     
         21 . The surface-modified nanoparticle recited in  claim 18  wherein the block copolymer comprises a second block that comprises a polyalkylene oxide. 
     
     
         22 . The surface-modified nanoparticle recited in  claim 18  wherein the block copolymer comprises a second block that comprises polyethylene oxide. 
     
     
         23 . The surface-modified nanoparticle recited in  claim 16  wherein the block copolymer comprises a polyalkylene glycol-poly(alkylene sulfide) block copolymer. 
     
     
         24 . The surface-modified nanoparticle recited in  claim 23  wherein the block copolymer has the general formula 
       
         
           
           
               
               
           
         
       
       where m and n are integers. 
     
     
         25 . The surface-modified nanoparticle recited in  claim 16  wherein the block copolymer comprises a first block that is a reversible addition fragmentation chain transfer agent (RAFT-CTA) and a second block that is a polyalkylene glycol. 
     
     
         26 . The surface-modified nanoparticle recited in  claim 25  wherein the block copolymer has the general formula 
       
         
           
           
               
               
           
         
       
       where n is a positive integer. 
     
     
         27 . A method for modifying the surface of nanoparticles comprising:
 preparing a solution of nanoparticles in a solvent;   exposing the nanoparticle solution to a solution of an amphiphilic macromolecule in a solvent.   
     
     
         28 . The method for modifying the surface of nanoparticles recited in  claim 27  wherein the solvent is toluene. 
     
     
         29 . The method for modifying the surface of nanoparticles recited in  claim 27  wherein exposing the nanoparticle solution to a solution of an amphiphilic macromolecule is performed under an inert atmosphere. 
     
     
         30 . The method for modifying the surface of nanoparticles recited in  claim 27  wherein exposing the nanoparticle solution to a solution of an amphiphilic macromolecule is accomplished with an excess of amphiphilic macromolecules. 
     
     
         31 . The method for modifying the surface of nanoparticles recited in  claim 27  further comprising:
 adding epoxy resin components to the mixture of nanoparticles and amphiphilic macromolecules. 
 
     
     
         32 . The method recited in  claim 32  further comprising:
 depositing a film of the nanoparticle-containing resin on a substrate.

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