Patents by Inventor Richard D. Schaller
Richard D. Schaller 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).
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Publication number: 20230375605Abstract: A method for identifying sufficient non-linear susceptibility in a test material. The method includes determining the polarizability of the test material, extracting from the polarizability, an optomechanical coupling of the test material, modeling light-induced dynamics, based on optomechanical coupling of the test material, and controlling the light induced dynamics to identify sufficient non-linear susceptibility.Type: ApplicationFiled: May 16, 2023Publication date: November 23, 2023Inventors: Pierre T. Darancet, Cristian L. Cortes, Stephen K. Gray, Richard D. Schaller, Sahar Sharifzadeheh, Anubhab Haldar
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Patent number: 11333908Abstract: Colloidal quantum wells have discrete energy states and electrons in the quantum wells undergo interband and intersubband state transitions. The transmissivity of a colloidal quantum well may be tuned by actively controlling the states of the colloidal quantum wells enabling ultrafast optical switching. A primary excitation source is configured to provide a primary excitation to promote a colloidal quantum well from a ground state to a first excitation state. A secondary excitation source is configured to provide a secondary excitation to the colloidal quantum well to promote the colloidal quantum well from the first excitation state to the second excitation state with the first and second excitation states being subbands in the conduction band of the colloidal quantum well.Type: GrantFiled: June 5, 2019Date of Patent: May 17, 2022Assignee: UCHICAGO ARGONNE, LLCInventors: Benjamin Diroll, Richard D. Schaller
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Publication number: 20200387016Abstract: Colloidal quantum wells have discrete energy states and electrons in the quantum wells undergo interband and intersubband state transitions. The transmissivity of a colloidal quantum well may be tuned by actively controlling the states of the colloidal quantum wells enabling ultrafast optical switching. A primary excitation source is configured to provide a primary excitation to promote a colloidal quantum well from a ground state to a first excitation state. A secondary excitation source is configured to provide a secondary excitation to the colloidal quantum well to promote the colloidal quantum well from the first excitation state to the second excitation state with the first and second excitation states being subbands in the conduction band of the colloidal quantum well.Type: ApplicationFiled: June 5, 2019Publication date: December 10, 2020Inventors: Benjamin Diroll, Richard D. Schaller
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Patent number: 10753545Abstract: An optically emissive material and, in particular, materials for use in single photon generation technologies, have multiple excited energy states that have different decay rates and can emit photons with different properties. A primary excitation radiation source is configured to apply primary radiation to an optically emissive material to excite the optically emissive material into a primary excited state. A secondary excitation radiation source is configured to apply secondary radiation to a thermal contribution material to generate thermal energy in the thermal contribution material. The thermal contribution material is physically configured to transfer thermal energy to the optically emissive material and excite the optically emissive material from the primary excited state to a secondary excited state for dynamic control of the emission rate, or emitted photon properties, of the optically emissive material.Type: GrantFiled: February 13, 2019Date of Patent: August 25, 2020Assignee: UCHICAGO ARGONNE, LLCInventors: Benjamin Diroll, Peijun Guo, Richard D. Schaller
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Publication number: 20200256519Abstract: An optically emissive material and, in particular, materials for use in single photon generation technologies, have multiple excited energy states that have different decay rates and can emit photons with different properties. A primary excitation radiation source is configured to apply primary radiation to an optically emissive material to excite the optically emissive material into a primary excited state. A secondary excitation radiation source is configured to apply secondary radiation to a thermal contribution material to generate thermal energy in the thermal contribution material. The thermal contribution material is physically configured to transfer thermal energy to the optically emissive material and excite the optically emissive material from the primary excited state to a secondary excited state for dynamic control of the emission rate, or emitted photon properties, of the optically emissive material.Type: ApplicationFiled: February 13, 2019Publication date: August 13, 2020Inventors: Benjamin Diroll, Peijun Guo, Richard D, Schaller
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Patent number: 10475710Abstract: A dielectric-coating based technique determines the refractive index of small dimension materials. The technique utilizes a sample of the small dimension material coated with the dielectric and an uncoated sample, where reflectivity is determined for each. The real and imaginary components of the refractive index can be determined for the small-dimension material itself.Type: GrantFiled: July 13, 2018Date of Patent: November 12, 2019Assignee: UChicago Argonne, LLCInventors: Peijun Guo, Richard D. Schaller
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Patent number: 10243660Abstract: Disclosed herein is a method of optical modulation, the method comprising irradiating an optical switch with a control beam at a first control time and irradiating the optical switch with a signal beam at a signal time. The transmitted intensity of the signal beam in a direction depends on the delay time between the first control time and the signal time and the transmitted intensity of the signal beam in the direction is detectably different than a static signal. The optical switch comprises a nanorod array, the nanorod array comprising a plurality of nanorods extending outwardly from a substrate.Type: GrantFiled: February 3, 2017Date of Patent: March 26, 2019Assignees: Northwester University, UChicago Argonne, LLCInventors: Robert P. H. Chang, Richard D. Schaller, John B. Ketterson, Peijun Guo
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Patent number: 10220378Abstract: Aspects of the disclosure relate to an efficient entirely man-made nanobio hybrid fabricated through cell-free expression of transmembrane proton pump followed by assembly of the synthetic protein architecture with semiconductor nanoparticles for photocatalytic H2 evolution. The system produces H2 at a turnover rate of 240 ?mol of H2 (?mol protein)?1 h?1 under green and 17.74 mmol of H2 (?mol protein)?1 h?1 under white light at ambient conditions, in water at neutral pH with methanol as a sacrificial electron donor. Robsutness and flexibility of this approach allows for systemic manipulation at nanoparticle-bio interface toward directed evolution of energy materials and devices.Type: GrantFiled: June 1, 2017Date of Patent: March 5, 2019Assignee: UChicago Argonne, LLCInventors: Elena A. Rozhkova, Peng Wang, Richard D. Schaller, Nada M. Dimitrijevic, Tijana Rajh, Shankar G. Balasubramanian
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Publication number: 20180345263Abstract: Aspects of the disclosure relate to an efficient entirely man-made nanobio hybrid fabricated through cell-free expression of transmembrane proton pump followed by assembly of the synthetic protein architecture with semiconductor nanoparticles for photocatalytic H2 evolution. The system produces H2 at a turnover rate of 240 ?mol of H2 (?mol protein)?1 h?1 under green and 17.74 mmol of H2 (?mol protein)?1 h?1 under white light at ambient conditions, in water at neutral pH with methanol as a sacrificial electron donor. Robsutness and flexibility of this approach allows for systemic manipulation at nanoparticle-bio interface toward directed evolution of energy materials and devices.Type: ApplicationFiled: June 1, 2017Publication date: December 6, 2018Inventors: Elena A. ROZHKOVA, Peng WANG, Richard D. SCHALLER, Nada M. DIMITRIJEVIC, Tijana RAJH, Shankar G. BALASUBRAMANIAN
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Patent number: 10138134Abstract: A method for forming inorganic structures includes (a) transferring nanocrystals to a polar protic solvent using at least one chalcogenide precursor to produce a negatively-charged chalcogen-rich nanocrystal surface, (b) removing excess anions of the chalcogenide precursor, (c) introducing a metal salt to bind a divalent metal cation to the negatively-charged chalcogen-rich nanocrystal surface to regenerate a positively-charged metal-rich nanocrystal surface, and (d) removing excess divalent metal cations of the metal acetate salt.Type: GrantFiled: July 7, 2017Date of Patent: November 27, 2018Assignee: UChicago Argonne, LLCInventors: Benjamin Diroll, Richard D. Schaller
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Publication number: 20170222724Abstract: Disclosed herein is a method of optical modulation, the method comprising irradiating an optical switch with a control beam at a first control time and irradiating the optical switch with a signal beam at a signal time. The transmitted intensity of the signal beam in a direction depends on the delay time between the first control time and the signal time and the transmitted intensity of the signal beam in the direction is detectably different than a static signal. The optical switch comprises a nanorod array, the nanorod array comprising a plurality of nanorods extending outwardly from a substrate.Type: ApplicationFiled: February 3, 2017Publication date: August 3, 2017Applicants: Northwestern University, UChicago Argonne, LLCInventors: Robert P. H. Chang, Richard D. Schaller, John B. Ketterson, Peijun Guo
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Patent number: 8135244Abstract: A fiber-based optical pressure-sensor, made using semiconductor nanocrystal quantum dots (NQDs) as the active transducing material, provides response time fast enough for shock wave measurements. For NQDs, the shift in band gap as a result of applied pressure can be observed as a shift of the photoluminescence (PL) peak. Further, the shift of the principal absorbance feature allows pressure measurements faster than those obtainable by following the PL peak.Type: GrantFiled: November 14, 2007Date of Patent: March 13, 2012Assignee: The United States of America as represented by the United States Deparment of EnergyInventors: Robert K. Sander, Kirill K. Zhuravlev, Richard D. Schaller, Jeffrey M. Pietryga, Michael Whitehead
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Patent number: 7888855Abstract: Composition comprising one or more energy donors and one or more energy acceptors, wherein energy is transferred from the energy donor to the energy acceptor and wherein: the energy acceptor is a colloidal nanocrystal having a lower band gap energy than the energy donor; the energy donor and the energy acceptor are separated by a distance of 40 nm or less; wherein the average peak absorption energy of the acceptor is at least 20 meV greater than the average peak emission energy of the energy donor; and wherein the ratio of the number of energy donors to the number of energy acceptors is from about 2:1 to about 1000:1.Type: GrantFiled: July 16, 2008Date of Patent: February 15, 2011Assignee: Los Alamos National Security, LLCInventors: Garry R. Maskaly, Richard D. Schaller, Victor I. Klimov
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Publication number: 20100013376Abstract: Composition comprising one or more energy donors and one or more energy acceptors, wherein energy is transferred from the energy donor to the energy acceptor and wherein: the energy acceptor is a colloidal nanocrystal having a lower band gap energy than the energy donor; the energy donor and the energy acceptor are separated by a distance of 40 nm or less; wherein the average peak absorption energy of the acceptor is at least 20 meV greater than the average peak emission energy of the energy donor; and wherein the ratio of the number of energy donors to the number of energy acceptors is from about 2:1 to about 1000:1.Type: ApplicationFiled: July 16, 2008Publication date: January 21, 2010Inventors: Garry R. Maskaly, Richard D. Schaller, Victor I. Klimov