Patents Assigned to The Government of the United States of Americas, as represented by the Secretary of the Navy
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Publication number: 20240014263Abstract: A bipolar nanocomposite semiconductor (BNS) material in which electrons and holes are separately transported throughout the BNS volume via an interpenetrating plurality of networks, where some of the networks have one conductivity type and others have the opposite conductivity type. The interpenetrating networks can include one or more multiple nanocrystalline structures, metal and dielectric networks and are intimately connected to enable band-like transport of both electrons and holes throughout the material.Type: ApplicationFiled: September 23, 2022Publication date: January 11, 2024Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Boris N. Feigelson, Alexander L. Efros, Benjamin L. Greenberg, Michael Shur
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Patent number: 11870005Abstract: An optoelectronic device comprising at least one quantum well (QW) and at least one quantum dot (QD) incorporated in the quantum well with the band gap of the quantum well being larger than the band gap of the quantum dot. The QDs and QD arrays are embedded in various QW, thus providing higher yields in optoelectronic devices, such as light emitting diodes, lasers, and photodetectors. This is achieved by a nearly complete suppression of the nonradiative Auger recombination and enhancement of the light extraction efficiency.Type: GrantFiled: June 30, 2020Date of Patent: January 9, 2024Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Alexander L. Efros, Michael Shur
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Patent number: 11862716Abstract: Heterostructures include a layer of a two-dimensional material placed on a multiferroic layer. An ordered array of differing polarization domains in the multiferroic layer produces corresponding domains having differing properties in the two-dimensional material. When the multiferroic layer is ferroelectric, the ferroelectric polarization domains in the layer produce local electric fields that penetrate the two-dimensional material. The local electric fields modulate the charge carriers and carrier density on a nanometer length scale, resulting in the formation of lateral p-n or p-i-n junctions, and variations thereof appropriate for device functions.Type: GrantFiled: September 28, 2022Date of Patent: January 2, 2024Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Berend T. Jonker, Connie H. Li, Kathleen M. McCreary, Olaf M. J. van 't Erve
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Patent number: 11858817Abstract: Disclosed is a method of irradiating a composition having water and hydrogen-terminated nanodiamonds with light that generates water-solvated electrons from the nanodiamonds. The method can be used to degrade fluoroalkyl compounds such as perfluorooctane sulfonate.Type: GrantFiled: November 25, 2020Date of Patent: January 2, 2024Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Bradford B. Pate, William Maza, Vanessa Breslin, Paul A. DeSario, Tatyana I. Feygelson, Albert Epshteyn, Jeffrey C. Owrutsky, Carlos Hangarter
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Publication number: 20230420539Abstract: A self-aligned lithography process for the fabrication of an electronic device having predefined areas of a second semiconductor material having a second conductivity type deposited into trenches formed in a first semiconductor material layer having a first conductivity type. A single lithography mask is used for etching trenches in the first semiconductor material, enabling cleaning of the trenches, and providing defined areas for the deposition of the second semiconductor material into the first semiconductor material. The presence of the areas of the second semiconductor material within the first semiconductor material creates a heterojunction beneath a metal for the formation of a first type of contact to the first semiconductor material and a second type of contact to the second type of material. By using a single mask for the etching, cleaning, and filling steps, misalignment issues plaguing devices having small (1-2 ?m) feature sizes is eliminated.Type: ApplicationFiled: June 23, 2023Publication date: December 28, 2023Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Joseph A. Spencer, Marko J. Tadjer, Alan G. Jacobs, Karl D. Hobart, Yuhao Zhang
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Patent number: 11841338Abstract: Optical and electronic detection of chemicals, and particularly strong electron-donors, by 2H to 1T phase-based transition metal dichalcogenide (TMD) films, detection apparatus incorporating the TMD films, methods for forming the detection apparatus, and detection systems and methods based on the TMD films are provided. The detection apparatus includes a 2H phase TMD film that transitions to the 1T phase under exposure to strong electron donors. After exposure, the phase state can be determined to assess whether all or a portion of the TMD has undergone a transition from the 2H phase to the 1T phase. Following detection, TMD films in the 1T phase can be converted back to the 2H phase, resulting in a reusable chemical sensor that is selective for strong electron donors.Type: GrantFiled: September 25, 2020Date of Patent: December 12, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, James C. Culbertson, Aubrey T. Hanbicki, Paul M. Campbell
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Publication number: 20230391992Abstract: A method of restoring an elastomer by providing an article containing a first elastomer and having a surface, contacting the surface with a layer conformal to the surface, and applying heat and pressure to the layer. The layer contains a second elastomer and a solute. The heat and pressure induce a transfer of the solute from the layer to the article.Type: ApplicationFiled: June 5, 2023Publication date: December 7, 2023Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Peter H. Mott, Howard L. Schrader, Nickolaus K. Weise
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Publication number: 20230387877Abstract: Method for forming an integrated acoustic device. A thin film piezoelectric acoustic transducer is epitaxially formed on a host substrate and is then transferred to a functional target substrate wherein physical phenomena from the piezoelectric transducer and the arbitrary functional substrate interact to form a hybrid acoustic microsystem comprising the piezoelectric transducer and the arbitrary functional substrate.Type: ApplicationFiled: May 11, 2023Publication date: November 30, 2023Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Vikrant J. GOKHALE, Brian P. DOWNEY, Shawn C. MACK, D. Scott KATZER, David J. MEYER, Pallavi DHAGAT, Albrecht JANDER
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Patent number: 11831295Abstract: Acoustic wave devices based on epitaxially grown heterostructures comprising appropriate combinations of epitaxially grown metallic transition metal nitride (TMN) layers, epitaxially grown Group III-nitride (III-N) piezoelectric semiconductor thin film layers, and epitaxially grown perovskite oxide (PO) layers. The devices can include bulk acoustic wave (BAW) devices, surface acoustic wave (SAW) devices, high overtone bulk acoustic resonator (HBAR) devices, and composite devices comprising HBAR devices integrated with high-electron-mobility transistors (HEMTs).Type: GrantFiled: September 14, 2020Date of Patent: November 28, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Vikrant J. Gokhale, Brian P. Downey, Matthew T. Hardy, Eric N. Jin, Neeraj Nepal, D. Scott Katzer, David J. Meyer
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Patent number: 11827572Abstract: Disclosed are compositions containing nanoparticles of a metal nitride, boride, silicide, or carbide, a filler material, and a carbonaceous matrix. The precursor to this material contains nanoparticles or particles of boron, silicon, iron, a refractory metal, or a refractory metal hydride, an organic compound having carbon and hydrogen, and a filler material. Multilayered materials are also disclosed.Type: GrantFiled: January 23, 2019Date of Patent: November 28, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Boris Dyatkin, Matthew Laskoski, William Edelen
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Patent number: 11828868Abstract: An antenna apparatus includes an aperture antenna. The antenna apparatus also includes a compact polarimetric monopulse waveguide antenna feed configured to communicate with the aperture antenna. Optionally, the compact polarimetric monopulse waveguide antenna feed includes a monopulse antenna feed configured to communicate with the aperture antenna. The compact polarimetric monopulse waveguide antenna feed also includes a compact polarimetric monopulse feed network configured to communicate with the monopulse antenna feed.Type: GrantFiled: November 27, 2019Date of Patent: November 28, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Christopher T. Rodenbeck, Joshua B. Beun, Thomas L. Ainsworth, Philip Langlois
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Patent number: 11827674Abstract: Peptides that form adhesive bonds, even in aqueous and/or saline environments, are disclosed. When aggregated, the peptides may be used in methods for producing hydrogels and/or adhesive materials. Synthetic peptide analogs are provided that are designed based on protein sequences found in barnacle adhesive, and may optionally be augmented with chemistry from other organisms that secrete proteins that adhere to substrates. The peptides may be used, for example, in biomedical and aqueous applications. Methods of using the aggregated peptides as adhesives are also provided.Type: GrantFiled: February 22, 2023Date of Patent: November 28, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Christopher R. So, Kathryn J. Wahl
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Patent number: 11831080Abstract: Systems and methods are provided for enabling a notch-based element that retains traditional notch ultra wideband (UWB) performance while having a highly-producible/-scalable structure, high power handling, a simple single-ended 50 ohm feeding, and relative insensitivity to a conductive back-plate. Embodiments of the present disclosure improve upon the traditional notch structure to further offer shorter element depth, lighter weight, and modularized assembly.Type: GrantFiled: April 26, 2022Date of Patent: November 28, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventor: John T. Logan
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Patent number: 11827008Abstract: A method for bonding infrared transparent materials by placing a polymer comprising at least one chalcogenide element and crosslinking moieties between infrared-transparent optical elements and applying heat, pressure, or both. The crosslinking moieties may be organic, inorganic, or both. Also disclosed is the related bonded assembly comprising infrared transparent optical elements.Type: GrantFiled: December 3, 2020Date of Patent: November 28, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Darryl A. Boyd, Jason D. Myers, Vinh Q. Nguyen, Daniel J. Gibson, Colin C. Baker, Woohong Kim, Jasbinder S. Sanghera
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Patent number: 11817240Abstract: The invention relates to heterostructures including a layer of a two-dimensional material placed on a multiferroic layer. An ordered array of differing polarization domains in the multiferroic layer produces corresponding domains having differing properties in the two-dimensional material. When the multiferroic layer is ferroelectric, the ferroelectric polarization domains in the layer produce local electric fields that penetrate the two-dimensional material. The local electric fields can influence properties of the two-dimensional material, including carrier density, transport properties, optical properties, surface chemistry, piezoelectric-induced strain, magnetic properties, and interlayer spacing. Methods for producing the heterostructures are provided. Devices incorporating the heterostructures are also provided, including tunable sensors, optical emitters, and programmable logic gates.Type: GrantFiled: March 22, 2021Date of Patent: November 14, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventor: Berend T Jonker
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Patent number: 11816867Abstract: Systems and methods are provided for color-enhancing satellite data in a manner that is specific to the true color ocean signal, i.e., the light that is emanating from the ocean surface. These color enhanced images, in turn, can be used as a scientific research and monitoring tool for studying the coastal ocean.Type: GrantFiled: February 16, 2021Date of Patent: November 14, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventor: Jason K. Jolliff
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Patent number: 11817318Abstract: A method for activating implanted dopants and repairing damage to dopant-implanted GaN to form n-type or p-type GaN. A GaN substrate is implanted with n- or p-type ions and is subjected to a high-temperature anneal to activate the implanted dopants and to produce planar n- or p-type doped areas within the GaN having an activated dopant concentration of about 1018-1022 cm?3. An initial annealing at a temperature at which the GaN is stable at a predetermined process temperature for a predetermined time can be conducted before the high-temperature anneal. A thermally stable cap can be applied to the GaN substrate to suppress nitrogen evolution from the GaN surface during the high-temperature annealing step. The high-temperature annealing can be conducted under N2 pressure to increase the stability of the GaN. The annealing can be conducted using laser annealing or rapid thermal annealing (RTA).Type: GrantFiled: March 1, 2023Date of Patent: November 14, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Travis J. Anderson, James C. Gallagher, Marko J. Tadjer, Alan G. Jacobs, Boris N. Feigelson
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Patent number: 11806678Abstract: An article having a nanoporous membrane and a nanoporous graphene sheet layered on the nanoporous membrane. A method of: depositing a layer of a diblock copolymer onto a graphene sheet, and etching a minor phase of the diblock copolymer and a portion of the graphene in contact with the minor phase to form a nanoporous article having a nanoporous graphene sheet and a nanoporous layer of a polymer. A method of: depositing a hexaiodo-substituted macrocycle onto a substrate having a Ag(111) surface; coupling the macrocycle to form a nanoporous graphene sheet; layering the graphene sheet and substrate onto a nanoporous membrane with the graphene sheet in contact with the nanoporous membrane; and etching away the substrate.Type: GrantFiled: March 4, 2021Date of Patent: November 7, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Manoj K. Kolel-Veetil, Paul E. Sheehan
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Patent number: 11808492Abstract: A cooling system employs at least one composite elastocaloric device. Each composite device has a first member with a first material and a second member with an elastocaloric material. The first material increases in size in response to an applied electric or magnetic field and returns to its prior size upon removal of the applied electric or magnetic field. The first and second members are mechanically coupled together such that the increase in size of the first material applies a stress to the elastocaloric material and the return of the first material to its prior size releases said stress, thereby causing the elastocaloric material to absorb heat.Type: GrantFiled: September 25, 2019Date of Patent: November 7, 2023Assignees: University of Maryland, College Park, The Government of the United States of America, as represented by the Secretary of the NavyInventors: Huilong Hou, Ichiro Takeuchi, Margo Staruch, Peter Finkel
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Patent number: 11807580Abstract: The present invention provides a method for making a high strength, small grain size ceramic having a transgranular fracture mode by rapid densification of a green body and subsequent cooling of the densified ceramic. The ceramic may include dislocations, defects, dopants, and/or secondary phases that are formed as a result of the process and resulting in stress fields capable of redirecting or arresting cracks within the material. This ceramic can maintain transparency from ultraviolet to mid-wave infrared.Type: GrantFiled: April 8, 2022Date of Patent: November 7, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Michael Hunt, Guillermo R. Villalobos, Benjamin Rock, Shyam S. Bayya, Woohong Kim, Ishwar D. Aggarwal, Bryan Sadowski, Jasbinder S. Sanghera