Patents by Inventor Hunter McDaniel

Hunter McDaniel 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).

  • Patent number: 10724951
    Abstract: A method is provided for verifying the authenticity of an article which bears a security mark. The method includes irradiating the security mark with a time-varying light source, ascertaining at least one portion of the emissions spectrum of the irradiated security mark with at least one photodetector, determining the photoluminescence lifetime of the security mark by monitoring the time or frequency response of the photodetector, and verifying the authenticity of the article only if the security mark exhibits a photoluminescence which has a lifetime that falls within the range of appropriate values for each portion of the photoluminescence spectrum for which the photoluminescence lifetime of said security mark was ascertained.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: July 28, 2020
    Assignee: UbiQD, Inc.
    Inventor: Hunter McDaniel
  • Publication number: 20200176625
    Abstract: An optical element is provided which comprises a plurality of fluorophores disposed in a medium. The fluorophores have a quantum yield greater than 50% and an absorption spectrum with a maximum intensity at wavelengths less than 400 nm, and emit a spectrum of light having a maximum intensity at wavelengths within the range of 400 nm to 1200 nm. The optical element is at least partially transparent over the visible region of the spectrum. The optical element is especially useful as a window or other optical component of a greenhouse structure.
    Type: Application
    Filed: May 9, 2018
    Publication date: June 4, 2020
    Inventors: Hunter McDaniel, Matthew Bergren
  • Publication number: 20190051779
    Abstract: Disclosed herein are embodiments of a composition comprising a polymer or sol-gel and one or more nanocrystals. The composition is useful as a luminescent solar concentrator. The nanocrystals are dispersed in the polymer or sol-gel matrix so as to reduce or substantially prevent nanocrystal-to-nanocrystal energy transfer and a subsequent reduction in the emission efficiency of the composition. In some embodiments, the polymer matrix comprises an acrylate polymer. Also disclosed herein is a method for making the composition. Devices comprising the composition are disclosed. In some cases the polymer is the waveguide, in others the polymer is applied as a coating on a waveguide. In some examples, the device is a window.
    Type: Application
    Filed: July 27, 2018
    Publication date: February 14, 2019
    Applicant: Los Alamos National Security, LLC
    Inventors: Hunter McDaniel, Victor I. Klimov
  • Patent number: 10170022
    Abstract: Common approaches to retroreflectors rely on absorptive materials that waste light energy that could be utilized for visibility. Disclosed photoluminescent retroreflectors filter reflected light, like traditional colored retroreflectors, but down-convert photons of the wrong color into a glow visible from more directions. The glow enables visibility for more observers or observers whose light source is far from their line of sight. The color of the glow can be adjusted by choice of luminescent material as a design feature or safety purpose. Certain embodiments utilize photoluminescent additives within a retroreflector while other embodiments utilize a photoluminescent coating on top of a pre-made retroreflector. An exemplary photoluminescent material for these optical devices is CuInZnS2 quantum dots.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: January 1, 2019
    Assignee: UbiQD, Inc.
    Inventor: Hunter McDaniel
  • Publication number: 20180364098
    Abstract: An optical element is provided which includes an optical fiber, and a plurality of fluorophores disposed inside the optical fiber. The fluorophores have a quantum yield greater than 50%, and emit a spectrum of light having a maximum intensity at wavelengths within the range of 400 nm to 2000 nm.
    Type: Application
    Filed: June 14, 2018
    Publication date: December 20, 2018
    Inventors: Hunter McDaniel, Nikolay S. Makarov, Matthew R. Bergren
  • Patent number: 10082387
    Abstract: A fluorescent liquid penetrant is provided which includes a liquid medium having a plurality of fluorophores disposed therein. Upon excitation with a suitable light source, the penetrant exhibits a quantum yield greater than 40% (or in some embodiments, greater than 90%). In some embodiments, the fluorophore is a low-toxicity quantum dot. In some embodiments, the fluorophore has significantly reduced self-absorption, which allows for surface discontinuity depth measurement. Also disclosed are apparatuses for using these fluorescent liquid penetrants for non-destructive testing purposes. In some embodiments, these tests include measuring the depth of a discontinuity by analyzing photoluminescence intensity and/or photoluminescence peak position shift.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: September 25, 2018
    Assignee: UbiQD, Inc.
    Inventors: Matthew R. Bergren, Hunter McDaniel
  • Publication number: 20180224375
    Abstract: A method is provided for verifying the authenticity of an article which bears a security mark. The method includes irradiating the security mark with a time-varying light source, ascertaining at least one portion of the emissions spectrum of the irradiated security mark with at least one photodetector, determining the photoluminescence lifetime of the security mark by monitoring the time or frequency response of the photodetector, and verifying the authenticity of the article only if the security mark exhibits a photoluminescence which has a lifetime that falls within the range of appropriate values for each portion of the photoluminescence spectrum for which the photoluminescence lifetime of said security mark was ascertained.
    Type: Application
    Filed: April 3, 2018
    Publication date: August 9, 2018
    Inventor: Hunter McDaniel
  • Patent number: 9964488
    Abstract: A method is provided for verifying the authenticity of an article which bears a security mark. The method includes irradiating the security mark with a time-varying light source, ascertaining at least one portion of the emissions spectrum of the irradiated security mark with at least one photodetector, determining the photoluminescence lifetime of the security mark by monitoring the time or frequency response of the photodetector, and verifying the authenticity of the article only if the security mark exhibits a photoluminescence which has a lifetime that falls within the range of appropriate values for each portion of the photoluminescence spectrum for which the photoluminescence lifetime of said security mark was ascertained.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: May 8, 2018
    Assignee: UbiQD, Inc.
    Inventor: Hunter McDaniel
  • Publication number: 20170341346
    Abstract: A laminated glass luminescent concentrator is provided which includes a solid medium having a plurality of fluorophores disposed therein. In some embodiments, the fluorophore is a low-toxicity quantum dot. In some embodiments, the fluorophore has significantly reduced self-absorption, which allows for unperturbed waveguiding of the photoluminescence over a long distance. Also disclosed are apparatuses for generating electricity from the laminated glass luminescent concentrator, and its combination with buildings and vehicles.
    Type: Application
    Filed: May 25, 2017
    Publication date: November 30, 2017
    Applicant: UbiQD, LLC
    Inventors: Hunter McDaniel, Aaron Jackson, Matthew R. Bergren
  • Patent number: 9790425
    Abstract: Common approaches to synthesizing alloyed quantum dots employ high-cost, air-sensitive phosphine complexes as the selenium precursor. Disclosed quantum dot synthesis embodiments avoid these hazardous and air-sensitive selenium precursors. Certain embodiments utilize a combination comprising a thiol and an amine that together reduce and complex the elemental selenium to form a highly reactive selenium precursor at room temperature. The same combination of thiol and amine acts as the reaction solvent, stabilizing ligand, and sulfur source in the synthesis of quantum dot cores. A non-injection approach may also be used. The optical properties of the quantum dots synthesized by this new approach can be finely tuned for a variety of applications by controlling size and/or composition of size and composition. Further, using the same approach, a shell can be grown around a quantum dot core that improves stability, luminescence efficiency, and may reduce toxicity.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: October 17, 2017
    Assignee: Los Alamos National Security, LLC
    Inventor: Hunter McDaniel
  • Publication number: 20170261313
    Abstract: A fluorescent liquid penetrant is provided which includes a liquid medium having a plurality of fluorophores disposed therein. Upon excitation with a suitable light source, the penetrant exhibits a quantum yield greater than 40% (or in some embodiments, greater than 90%). In some embodiments, the fluorophore is a low-toxicity quantum dot. In some embodiments, the fluorophore has significantly reduced self-absorption, which allows for surface discontinuity depth measurement. Also disclosed are apparatuses for using these fluorescent liquid penetrants for non-destructive testing purposes. In some embodiments, these tests include measuring the depth of a discontinuity by analyzing photoluminescence intensity and/or photoluminescence peak position shift.
    Type: Application
    Filed: March 9, 2017
    Publication date: September 14, 2017
    Applicant: UbiQD, LLC
    Inventors: Matthew R. Bergren, Hunter McDaniel
  • Publication number: 20170218264
    Abstract: Disclosed herein are embodiments of a composition comprising a polymer or sol-gel matrix and one or more nanocrystals. The composition is useful for making various products, including a luminescent solar concentrator. The nanocrystals are dispersed in the polymer or sol-gel matrix to reduce or substantially prevent nanocrystal-to-nanocrystal energy transfer and a subsequent reduction in the emission efficiency of the composition. The nanocrystals may comprise an antenna portion and an emitter portion, and in some embodiments the materials for the antenna and emitter portions are selected to produce a large Stokes shift between the absorption and emission wavelengths. In some embodiments, the polymer matrix comprises an acrylate polymer. Also disclosed herein is a method for making the composition, which may comprise a pre-polymerization step before the nanocrystals are introduced. Devices comprising the composition and a photovoltaic cell also are disclosed. In some examples, the device is a window.
    Type: Application
    Filed: October 13, 2014
    Publication date: August 3, 2017
    Applicants: Los Alamos National Security, LLC, Universita Degli Studi Di Milano-Bicocca
    Inventors: Victor I. Klimov, Hunter McDANIEL, Sergio BROVELLI, Francesco MEINARDI
  • Publication number: 20170082542
    Abstract: A method is provided for verifying the authenticity of an article which bears a security mark. The method includes irradiating the security mark with a time-varying light source, ascertaining at least one portion of the emissions spectrum of the irradiated security mark with at least one photodetector, determining the photoluminescence lifetime of the security mark by monitoring the time or frequency response of the photodetector, and verifying the authenticity of the article only if the security mark exhibits a photoluminescence which has a lifetime that falls within the range of appropriate values for each portion of the photoluminescence spectrum for which the photoluminescence lifetime of said security mark was ascertained.
    Type: Application
    Filed: September 21, 2015
    Publication date: March 23, 2017
    Inventor: Hunter McDaniel
  • Patent number: 9540523
    Abstract: A security ink is provided which includes a liquid medium having a plurality of quantum dots disposed therein. Upon excitation with a suitable light source, the ink exhibits a quantum yield greater than 30%, and a photoluminescence which has a lifetime of more than 40 nanoseconds and which varies by at least 5% across the emission spectrum of the quantum dots. Also disclosed are apparatuses for using the same for anti-counterfeit or authentication purposes, which uniquely identifying the presence of photoluminescent materials by spectrally resolving their photoluminescence lifetime.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: January 10, 2017
    Assignee: UbiQD, LLC
    Inventor: Hunter McDaniel
  • Publication number: 20160380140
    Abstract: Disclosed herein are embodiments of a composition comprising a polymer or sol-gel and one or more nanocrystals. The composition is useful as a luminescent solar concentrator. The nanocrystals are dispersed in the polymer or sol-gel matrix so as to reduce or substantially prevent nanocrystal-to-nanocrystal energy transfer and a subsequent reduction in the emission efficiency of the composition. In some embodiments, the polymer matrix comprises an acrylate polymer. Also disclosed herein is a method for making the composition. Devices comprising the composition are disclosed. In some cases the polymer is the waveguide, in others the polymer is applied as a coating on a waveguide. In some examples, the device is a window.
    Type: Application
    Filed: June 24, 2016
    Publication date: December 29, 2016
    Applicant: Los Alamos National Security, LLC
    Inventors: Hunter McDaniel, Victor I. Klimov
  • Patent number: 9382432
    Abstract: A security ink is provided which includes a liquid medium having a plurality of quantum dots disposed therein. Upon excitation with a suitable light source, the ink exhibits a quantum yield greater than 30%, and a photoluminescence which has a lifetime of more than 40 nanoseconds and which varies by at least 5% across the emission spectrum of the quantum dots. Also disclosed are apparatuses for using the same for anti-counterfeit or authentication purposes, which uniquely identifying the presence of photoluminescent materials by spectrally resolving their photoluminescence lifetime.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: July 5, 2016
    Assignee: UbiQD, LLC
    Inventor: Hunter McDaniel
  • Publication number: 20150318119
    Abstract: Embodiments of photoanodes and quantum dot-sensitized solar cells (QDSSCs) comprising colloidal, cation-exchanged quantum dots are disclosed. The quantum dots include a core and an outer cation-exchanged layer having a cation composition that differs from a cation composition of the core. Methods of making the quantum dots, photoanodes, and QDSSCs also are disclosed.
    Type: Application
    Filed: December 4, 2012
    Publication date: November 5, 2015
    Inventors: Hunter MCDANIEL, Nobuhiro FUKE, Victor I. KLIMOV
  • Publication number: 20150299567
    Abstract: Common approaches to synthesizing alloyed quantum dots employ high-cost, air-sensitive phosphine complexes as the selenium precursor. Disclosed quantum dot synthesis embodiments avoid these hazardous and air-sensitive selenium precursors. Certain embodiments utilize a combination comprising a thiol and an amine that together reduce and complex the elemental selenium to form a highly reactive selenium precursor at room temperature. The same combination of thiol and amine acts as the reaction solvent, stabilizing ligand, and sulfur source in the synthesis of quantum dot cores. A non-injection approach may also be used. The optical properties of the quantum dots synthesized by this new approach can be finely tuned for a variety of applications by controlling size and/or composition of size and composition. Further, using the same approach, a shell can be grown around a quantum dot core that improves stability, luminescence efficiency, and may reduce toxicity.
    Type: Application
    Filed: April 17, 2015
    Publication date: October 22, 2015
    Inventor: Hunter McDaniel
  • Publication number: 20150279250
    Abstract: Common approaches to retroreflectors rely on absorptive materials that waste light energy that could be utilized for visibility. Disclosed photoluminescent retroreflectors filter reflected light, like traditional colored retroreflectors, but down-convert photons of the wrong color into a glow visible from more directions. The glow enables visibility for more observers or observers whose light source is far from their line of sight. The color of the glow can be adjusted by choice of luminescent material as a design feature or safety purpose. Certain embodiments utilize photoluminescent additives within a retroreflector while other embodiments utilize a photoluminescent coating on top of a pre-made retroreflector. An exemplary photoluminescent material for these optical devices is CuInZnS2 quantum dots.
    Type: Application
    Filed: June 10, 2015
    Publication date: October 1, 2015
    Inventor: Hunter McDaniel
  • Publication number: 20140275544
    Abstract: Embodiments of linkers for binding semiconductor quantum dots (QDs) to metal oxides are disclosed. The linkers have a general formula F1-A-(F2)z wherein F1 is —COOH, —COO?, —PO3H2, —PO3H?, —B(OH)2, —BO2H?, —SO3H, —SO3?, —NH2, —SH, or —S?; A is aryl, heteroaryl, aliphatic, or heteroaliphatic; and z?1 and each F2 independently is —PO3H2, —PO3H?, —B(OH)2, —BO2H?, —SO3H, —SO3?, or z?2 and each F2 independently is —COOH, —COO?, —PO3H2, —PO3H?, —B(OH)2, —BO2H?, —SO3H, or —SO3?, or z?2 and (F2)z collectively is an oxysilane moiety comprising z lower alkoxy groups bound to silicon. Methods of binding QDs to metal oxides with the disclosed linkers also are disclosed, as well as devices including the QD-functionalized metal oxides.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Inventors: Hunter McDaniel, Alexey Y. Koposov, Anshu Pandey, Nobuhiro Fuke, Victor I. Klimov