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    DURABLE, BROADBAND-TRANSPARENT POLYOXALAMIDE POLYMERS AND METHODS OF MAKING AND USING THE SAME
    1.
    发明申请
    DURABLE, BROADBAND-TRANSPARENT POLYOXALAMIDE POLYMERS AND METHODS OF MAKING AND USING THE SAME 有权

    公开(公告)号：US20240400824A1

    公开(公告)日：2024-12-05

    申请号：US18799575

    申请日：2024-08-09

    Applicant: HRL Laboratories, LLC

    Inventor： Kevin DRUMMEY ,  Ashley DUSTIN ,  Andrew NOWAK ,  Adam GROSS ,  Shanying CUI

    IPC: C08L77/06 ,  C08G69/28

    Abstract: Some variations provide a polyoxalamide polymer comprising: one or more first segments containing at least one repeat unit that includes (i) a branched, aliphatic hydrocarbon species and (ii) first amide groups at internal ends of the repeat unit, wherein the first amide groups are part of oxalamide groups; one or more polymer end groups containing second amide groups that are each covalently bonded directly to one of the first amide groups, wherein the second amide groups are also part of the oxalamide groups, and wherein the oxalamide groups contain —N—C(═O)—C(═O)—N— sequences; and a reacted form of one or more multifunctional amine chain extenders or crosslinkers with an amine functionality of 3 or greater. The polyoxalamide polymer may be present in a lens, a window, a coating, or a film, for example. The polyoxalamide polymer may have UV transparency, visual transparency, NIR transparency, MWIR transparency, and/or LWIR transparency.

    MAGNETICALLY ANISOTROPIC BINDER-FREE FILMS CONTAINING DISCRETE HEXAFERRITE NANOPLATELETS
    3.
    发明申请
    MAGNETICALLY ANISOTROPIC BINDER-FREE FILMS CONTAINING DISCRETE HEXAFERRITE NANOPLATELETS 有权

    公开(公告)号：US20220351885A1

    公开(公告)日：2022-11-03

    申请号：US17682478

    申请日：2022-02-28

    Applicant: HRL Laboratories, LLC

    Inventor： Shanying CUI ,  Xin N. GUAN ,  Adam F. GROSS ,  Florian G. HERRAULT

    IPC: H01F1/34 ,  H01F41/24 ,  H01F10/20 ,  H01F10/28 ,  H01F10/30

    Abstract: Some variations provide a magnetically anisotropic structure comprising a hexaferrite film disposed on a substrate, wherein the hexaferrite film contains a plurality of discrete and aligned magnetic hexaferrite particles, wherein the hexaferrite film is characterized by an average film thickness from about 1 micron to about 500 microns, and wherein the hexaferrite film contains less than 2 wt % organic matter. The hexaferrite film does not require a binder. Discrete particles are not sintered or annealed together because the maximum processing temperature to fabricate the structure is 500° C. or less, such as 250° C. or less. The magnetic hexaferrite particles may contain barium hexaferrite (BaFe12O19) and/or strontium hexaferrite (SrFe12O19). The hexaferrite film may be characterized by a remanence-to-saturation magnetization ratio of at least 0.7. Methods of making and using the magnetically anisotropic structure are also described.

    METHODS FOR CHARGE-TITRATING ASSEMBLY OF PARTIALLY METALLIZED NANOPARTICLES, AND METAMATERIALS PRODUCED THEREFROM
    4.
    发明申请
    METHODS FOR CHARGE-TITRATING ASSEMBLY OF PARTIALLY METALLIZED NANOPARTICLES, AND METAMATERIALS PRODUCED THEREFROM 有权

    公开(公告)号：US20210147226A1

    公开(公告)日：2021-05-20

    申请号：US17136515

    申请日：2020-12-29

    Applicant: HRL Laboratories, LLC

    Inventor： Christopher S. ROPER ,  Adam F. GROSS ,  Shanying CUI

    IPC: B82B3/00 ,  G02B1/00 ,  G02F1/065 ,  G02B6/293

    Abstract: Variations provide a metamaterial comprising a plurality of metamaterial repeat units containing a surface-patterned nanoparticle or microparticle that is coated with a metal in a surface pattern. The surface-patterned particle may include a dielectric material or a semiconductor material partially or fully coated with metal(s). In some embodiments, the surface-patterned particles are split ring resonators. Some variations provide a method of making a metamaterial, the method comprising: metallizing surfaces of particles, wherein particles are coated with metal(s) in a surface pattern; dispersing surface-patterned particles in a liquid solution at a starting pH; introducing a triggerable pH-control substance capable of generating an acid or base; and triggering the pH-control substance to generate an acid or base, thereby adjusting the solution pH to a titrated pH. The zeta potential is closer to zero at the titrated pH compared to the starting pH, causing the surface-patterned particles to assemble into a metamaterial.

    DISSOLVING DROPLET MICROFLUIDIC PARTICLE ASSEMBLY DEVICES AND METHODS, AND PARTICLE ASSEMBLIES OBTAINED THEREFROM
    5.
    发明申请
    DISSOLVING DROPLET MICROFLUIDIC PARTICLE ASSEMBLY DEVICES AND METHODS, AND PARTICLE ASSEMBLIES OBTAINED THEREFROM 审中-公开

    公开(公告)号：US20200030802A1

    公开(公告)日：2020-01-30

    申请号：US16411058

    申请日：2019-05-13

    Applicant: HRL Laboratories, LLC

    Inventor： Christopher S. ROPER ,  Adam F. GROSS ,  Shanying CUI

    IPC: B01L3/00 ,  B01F3/08

    Abstract: Some variations provide a device for assembling a plurality of particles into particle assemblies, comprising: (a) a microfluidic droplet-generating region; (b) a first inlet to the droplet-generating region, configured to feed a first fluid containing particles and a solvent for the particles; (c) a second inlet to the droplet-generating region, configured to feed a second fluid that is not fully miscible with the first fluid; (d) a droplet outlet from the droplet-generating region, configured to withdraw droplets of the first fluid dispersed in the second fluid; and (e) a droplet-dissolving region configured to remove solvent from the droplets, thereby forming particle assemblies. Some variations also provide an assembly of nanoparticles, wherein the assembly has a volume from 1 μm3 to 1 mm3, a packing fraction from 20% to 100%, and/or an average relative surface roughness less than 1%, wherein the assembly is not disposed on a substrate.

    MODULAR PHOTONIC REFLECTORS
    6.
    发明申请
    MODULAR PHOTONIC REFLECTORS 有权

    公开(公告)号：US20220365259A1

    公开(公告)日：2022-11-17

    申请号：US17322481

    申请日：2021-05-17

    Applicant: HRL Laboratories, LLC

    Inventor： Raymond SARKISSIAN ,  Phuong Phuc Nam BUI ,  Tobias Anton SCHAEDLER ,  Shanying CUI

    IPC: G02B5/02 ,  G02B1/00 ,  G02B5/124

    Abstract: A photonic reflector device includes a first layer, a second layer, and a third layer. The first layer, which functions as a retro-reflector, is formed of a first material contacting a second material and having a non-planar interface therebetween. The second layer, which functions as a photonic crystal, includes third and fourth materials that have different refractive indices from one another and are configured such that the second layer has a periodic optical potential along at least one dimension. The third layer, which functions as a Lambertian scatterer, includes a plurality of inclusions in a first matrix material. In combination, the layers may be optimized to synergistically reflect targeted wavelengths and/or polarizations of light.

    OMNIDIRECTIONAL AND THERMALLY DURABLE INFRARED REFLECTORS, AND METHODS FOR MAKING THE SAME
    7.
    发明申请
    OMNIDIRECTIONAL AND THERMALLY DURABLE INFRARED REFLECTORS, AND METHODS FOR MAKING THE SAME 有权

    公开(公告)号：US20210157031A1

    公开(公告)日：2021-05-27

    申请号：US16990096

    申请日：2020-08-11

    Applicant: HRL Laboratories, LLC

    Inventor： Shanying CUI ,  Sean M. MEENEHAN ,  Tobias A. SCHAEDLER ,  Phuong BUI

    IPC: G02B1/00 ,  G02B5/10

    Abstract: The disclosed structure is configured such that it does not support electromagnetic waves having frequencies within a selected band gap; those electromagnetic waves are thus reflected. Some variations provide an omnidirectional infrared reflector comprising a three-dimensional photonic crystal containing: rods of a first material that has a first refractive index, wherein the rods are arranged to form a plurality of lattice periods in three dimensions, and wherein the rods are connected at a plurality of nodes; and a second material that has a refractive index that is lower than the first refractive index, wherein the rods are embedded in the second material. The lattice spacing and the rod radius or width are selected to produce a photonic band gap within a selected band of the infrared spectrum. Methods of making and using the three-dimensional photonic crystal are described. Applications include thermal barrier coatings and blackbody emission signature control.

    METHODS FOR DISSOLVING DROPLET PARTICLE ASSEMBLY WITH CO-SOLVENT, AND PARTICLE ASSEMBLIES OBTAINED THEREFROM
    8.
    发明申请
    METHODS FOR DISSOLVING DROPLET PARTICLE ASSEMBLY WITH CO-SOLVENT, AND PARTICLE ASSEMBLIES OBTAINED THEREFROM 审中-公开

    公开(公告)号：US20200030767A1

    公开(公告)日：2020-01-30

    申请号：US16411061

    申请日：2019-05-13

    Applicant: HRL Laboratories, LLC

    Inventor： Christopher S. ROPER ,  Shanying CUI ,  Adam F. GROSS

    IPC: B01J13/10

    Abstract: Some variations provide a method of assembling a plurality of particles into particle assemblies, comprising: (a) obtaining a first fluid containing particles and a solvent for the particles; (b) obtaining a second fluid not fully miscible with the first fluid; (c) obtaining a third fluid that is a co-solvent for the first fluid and the second fluid; (d) combining the first fluid and the second fluid to generate an emulsion containing droplets of the first fluid in the second fluid; (e) adding the third fluid to the emulsion; and (f) dissolving out the solvent from the droplets into the third fluid, thereby forming particle assemblies. Some variations also provide an assembly of nanoparticles, wherein the assembly has a volume from 1 μm3 to 1 mm3, a packing fraction from 20% to 100%, and/or an average relative surface roughness less than 1%, wherein the assembly is not disposed on a substrate.

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