Patents by Inventor Nigel Pickett

Nigel Pickett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20140252273
    Abstract: A method for producing aqueous compatible semiconductor nanoparticles includes binding pre-modified ligands to nanoparticles without the need for further post-binding modification to render the nanoparticles aqueous compatible. Nanoparticles modified in this way may exhibit enhanced fluorescence and stability compared to aqueous compatible nanoparticles produced by methods requiring post-binding modification processes.
    Type: Application
    Filed: May 21, 2014
    Publication date: September 11, 2014
    Applicant: Nanoco Technologies Ltd.
    Inventors: Nigel Pickett, Mark Christopher McCairn
  • Publication number: 20140249324
    Abstract: Nanoparticles containing IUPAC group 11 ions, group 13 ions and sulfur ions are synthesized by adding metal salts and an alkanethiol in an organic solvent and promoting the reaction by applying heat. Nanoparticles are formed at temperatures as low as 200° C. The nanoparticles may be thermally annealed for a certain amount of time at a temperature lower than the reaction temperature (usually ˜40° C. lower) to improve the topology and narrow the size distribution. After the reaction is complete, the nanoparticles may be isolated by the addition of a non-solvent and re-dispersed in organic solvents including toluene, chloroform and hexane to form a nanoparticle ink. Additives may be incorporated in the reaction solution to tailor the final ink viscosity.
    Type: Application
    Filed: March 3, 2014
    Publication date: September 4, 2014
    Applicant: Nanoco Technologies, Ltd.
    Inventors: James Harris, Christopher Newman, Ombretta Masala, Laura Wylde, Nigel Pickett
  • Patent number: 8784701
    Abstract: A process for producing nanoparticles incorporating ions selected from groups 13, 16, and 11 or 12 of the periodic table, and materials produced by the process. In an embodiment, the process includes effecting conversion of a nanoparticle precursor composition comprising group 13, 16, and 11 or 12 ions to the material of the nanoparticles in the presence of a selenol compound. Other embodiments include a process for fabricating a thin film including nanoparticles incorporating ions selected from groups 13, 16, and 11 or 12 of the periodic table as well as a process for producing a printable ink formulation including the nanoparticles.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: July 22, 2014
    Assignee: Nanoco Technologies Ltd.
    Inventors: Nigel Pickett, James Harris
  • Publication number: 20140155640
    Abstract: The present invention relates to a process for the production of surface functionalised nanoparticles, such as the production of semiconductor quantum dot nanoparticles incorporating surface-bound functional groups which increase the ease with which the dots can be employed in applications, such as incorporation into solvents, inks, polymers, glasses, metals, electronic materials and devices, bio-molecules and cells. The method comprises reacting first and second nanoparticle precursor species in the presence of a nanoparticle surface binding ligand X—Y—Z wherein X is a nanoparticle surface binding group, Y is a linker group, and Z is a functional group, in which Y comprises a polyethyleneglycol group and/or Z comprises an aliphatic group incorporating a terminal unsaturated group, said reaction being effected under conditions permitting binding of said surface binding ligand to the growing nanoparticles to produce said surface functionalised nanoparticles.
    Type: Application
    Filed: November 19, 2013
    Publication date: June 5, 2014
    Applicant: NANOCO TECHNOLOGIES LTD.
    Inventors: Nigel Pickett, Mark C. McCairn, Steven M. Daniels, Imrana Mushtaq, Paul Glarvey
  • Patent number: 8741177
    Abstract: A method for producing aqueous compatible semiconductor nanoparticles includes binding pre-modified ligands to nanoparticles without the need for further post-binding modification to render the nanoparticles aqueous compatible. Nanoparticles modified in this way may exhibit enhanced fluorescence and stability compared to aqueous compatible nanoparticles produced by methods requiring post-binding modification processes.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: June 3, 2014
    Assignee: Nanoco Technologies Ltd.
    Inventors: Nigel Pickett, Mark C. McCairn
  • Publication number: 20140098515
    Abstract: An illuminated sign has a primary light source in spaced apart relation to a transparent or translucent substrate having quantum dot phosphors printed or coated thereon. The primary light source may be a blue LED, a white LED or an LED having a significant portion of its emission in the ultraviolet region of the spectrum. The LED may be a backlight for the transparent or translucent substrate and/or an edge light, a down light or an up light.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 10, 2014
    Applicant: Nanoco Technologies Ltd.
    Inventors: Nigel Pickett, Ombretta Masala, James Harris, Nathalie Gresty
  • Publication number: 20140011317
    Abstract: A method of preparing Group XIII selenide nanoparticles comprises reacting a Group XIII ion source with a selenol compound. The nanoparticles have an MxSey semiconductor core (where M is In or Ga) and an organic capping ligand attached to the core via a carbon-selenium bond. The selenol provides a source of selenium for incorporation into the semiconductor core and also provides the organic capping ligand. The nanoparticles are particularly suitable for solution-based methods of preparing semiconductor films.
    Type: Application
    Filed: July 5, 2013
    Publication date: January 9, 2014
    Inventors: Nathalie Gresty, Ombretta Masala, Christopher Newman, Stephen Whitelegg, Nigel Pickett
  • Patent number: 8597730
    Abstract: A process for the production of surface functionalised nanoparticles, such as the production of semiconductor quantum dot nanoparticles incorporating surface-bound functional groups that increase the ease with which the dots can be employed in applications, such as incorporation into solvents, inks, polymers, glasses, metals, electronic materials and devices, bio-molecules and cells. Embodiments of the method include reacting first and second nanoparticle precursor species in the presence of a nanoparticle surface binding ligand X—Y—Z where X is a nanoparticle surface binding group, Y is a linker group, and Z is a functional group, in which Y comprises a polyethyleneglycol group and/or Z comprises an aliphatic group incorporating a terminal unsaturated group, the reaction being effected under conditions permitting binding of said surface binding ligand to the growing nanoparticles to produce said surface functionalised nanoparticles.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: December 3, 2013
    Assignee: Nanoco Technologies Ltd.
    Inventors: Nigel Pickett, Mark C. McCairn, Steven M. Daniels, Imrana Mushtaq, Paul Glarvey
  • Patent number: 8563348
    Abstract: A continuous film of desired electrical characteristics is obtained by successively printing and annealing two or more dispersions of prefabricated nanoparticles.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: October 22, 2013
    Assignee: Nanoco Technologies Ltd.
    Inventors: James Harris, Nigel Pickett
  • Patent number: 8524365
    Abstract: A method of producing nanoparticles comprises effecting conversion of a nanoparticle precursor composition to the material of the nanoparticles. The precursor composition comprises a first precursor species containing a first ion to be incorporated into the growing nanoparticles and a separate second precursor species containing a second ion to be incorporated into the growing nanoparticles. The conversion is effected in the presence of a molecular cluster compound under conditions permitting seeding and growth of the nanoparticles.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: September 3, 2013
    Assignee: Nanoco Technologies Ltd.
    Inventors: Paul O'Brien, Nigel Pickett
  • Publication number: 20130140600
    Abstract: In various embodiments, the present invention provides a light emitting device cap configured for location on a light emitting device comprising or consisting essentially of a primary light source. The cap defines a well region within which is received a population of semiconductor nanoparticles such that the semiconductor nanoparticles are in optical communication with the primary light source of the light emitting device when the cap is located on the light emitting device. There is further provided a light emitting device comprising or consisting essentially of a primary light source and such a cap, as well as methods for fabricating such a cap and device.
    Type: Application
    Filed: May 31, 2012
    Publication date: June 6, 2013
    Applicant: Nanoco Technologies, Ltd.
    Inventors: James Harris, Imad Naasani, Nigel Pickett
  • Patent number: 8394663
    Abstract: Embodiments of the present invention involve photovoltaic (PV) cells comprising a semiconducting nanorod-nanocrystal-polymer hybrid layer, as well as methods for fabricating the same. In PV cells according to this invention, the nanocrystals may serve both as the light-absorbing material and as the heterojunctions at which excited electron-hole pairs split.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: March 12, 2013
    Assignee: Nanoco Technologies, Ltd.
    Inventors: James Harris, Nigel Pickett
  • Patent number: 8394976
    Abstract: Embodiments of the invention relate to a process for the production of surface functionalised nanoparticles, such as semiconductor quantum dot nanoparticles incorporating surface-bound functional groups suitable for enabling the dots to be incorporated into silicone polymers.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: March 12, 2013
    Assignee: Nanoco Technologies, Ltd.
    Inventors: Nigel Pickett, Mark C. McCairn, Steven M. Daniels, Imrana Mushtaq, Paul Glarvey
  • Patent number: 8337720
    Abstract: Embodiments of the invention involve semiconductor nanoparticle capping ligands, their production and use. Ligands may have the formula with m ranging from approximately 8 to approximately 45. An embodiment provides a method of forming a compound of the formula including the steps of providing a first starting material comprising poly(ethyleneglycol) and reacting the first starting material with a second starting material comprising a functional group for chelating to the surface of a nanoparticle to thereby form the compound.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: December 25, 2012
    Assignee: Nanoco Technologies, Ltd.
    Inventors: Mark C. McCairn, Steven M. Daniels, Siobhan Cummins, Nigel Pickett
  • Publication number: 20120028406
    Abstract: Embodiments of the present invention involve photovoltaic (PV) cells comprising a semiconducting nanorod-nanocrystal-polymer hybrid layer, as well as methods for fabricating the same. In PV cells according to this invention, the nanocrystals may serve both as the light-absorbing material and as the heterojunctions at which excited electron-hole pairs split.
    Type: Application
    Filed: January 27, 2011
    Publication date: February 2, 2012
    Inventors: James Harris, Nigel Pickett
  • Publication number: 20120025155
    Abstract: A method of producing nanoparticles comprises effecting conversion of a nanoparticle precursor composition to the material of the nanoparticles. The precursor composition comprises a first precursor species containing a first ion to be incorporated into the growing nanoparticles and a separate second precursor species containing a second ion to be incorporated into the growing nanoparticles. The conversion is effected in the presence of a molecular cluster compound under conditions permitting seeding and growth of the nanoparticles.
    Type: Application
    Filed: October 6, 2011
    Publication date: February 2, 2012
    Applicant: NANOCO TECHNOLOGIES LIMITED
    Inventors: Paul O'Brien, Nigel Pickett
  • Patent number: 8062703
    Abstract: A method of producing nanoparticles comprises effecting conversion of a nanoparticle precursor composition to the material of the nanoparticles. The precursor composition comprises a first precursor species containing a first ion to be incorporated into the growing nanoparticles and a separate second precursor species containing a second ion to be incorporated into the growing nanoparticles. The conversion is effected in the presence of a molecular cluster compound under conditions permitting seeding and growth of the nanoparticles.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: November 22, 2011
    Assignee: Nanoco Technologies Ltd.
    Inventors: Paul O'Brien, Nigel Pickett
  • Patent number: 7985446
    Abstract: A method of producing nanoparticles comprises effecting conversion of a nanoparticle precursor composition to the material of the nanoparticles. The precursor composition comprises a first precursor species containing a first ion to be incorporated into the growing nanoparticles and a separate second precursor species containing a second ion to be incorporated into the growing nanoparticles. The conversion is effected in the presence of a molecular cluster compound under conditions permitting seeding and growth of the nanoparticles.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: July 26, 2011
    Assignee: Nanoco Technologies Limited
    Inventors: Paul O'Brien, Nigel Pickett
  • Publication number: 20110108799
    Abstract: Method for producing a nanoparticle comprised of core, first shell and second shell semiconductor materials. Effecting conversion of a core precursor composition comprising separate first and second precursor species to the core material and then depositing said first and second shells. The conversion is effected in the presence of a molecular cluster compound under conditions permitting seeding and growth of the nanoparticle core. Core/multishell nanoparticles in which at least two of the core, first shell and second shell materials incorporate ions from groups 12 and 15, 14 and 16, or 11, 13 and 16 of the periodic table. Core/multishell nanoparticles in which the second shell material incorporates at least two different group 12 ions and group 16 ions. Core/multishell nanoparticles in which at least one of the core, first and second semiconductor materials incorporates group 11, 13 and 16 ions and the other semiconductor material does not incorporate group 11, 13 and 16 ions.
    Type: Application
    Filed: December 3, 2010
    Publication date: May 12, 2011
    Inventors: Nigel Pickett, Steven Daniels, Paul O'Brien
  • Publication number: 20110068321
    Abstract: In various embodiment, a primary particle includes a primary matrix material containing a population of semiconductor nanoparticles, with each primary particle further comprising an additive to enhance the physical, chemical and/or photo-stability of the semiconductor nanoparticles. A method of preparing such particles is described. Composite materials and light-emitting devices incorporating such primary particles are also described.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 24, 2011
    Applicant: NANOCO TECHNOLOGIES LIMITED
    Inventors: Nigel Pickett, Imad Naasani, James Harris