Patents by Inventor A. Alivisatos
A. Alivisatos 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: 20220309668Abstract: Systems and methods are disclosed herein for determining a diagnosis based on a base skin tone of a patient. In an embodiment, the system receives a base skin tone image of a patient, generates a calibrated base skin tone image by calibrating the base skin tone image using a reference calibration profile, and determines a base skin tone of the patient based on the calibrated base skin tone image. The system receives a concern image of a portion of the patient's skin, and selects a set of machine learning diagnostic models from a plurality of sets of candidate machine learning diagnostic models based on the base skin tone of the patient, each of the sets of candidate machine learning diagnostic models trained to receive the concern image and output a diagnosis of a condition of the patient.Type: ApplicationFiled: June 15, 2020Publication date: September 29, 2022Inventors: Elliot Swart, Elektra Efstratiou Alivisatos, Joseph Ferrante, Elizabeth Asai
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Patent number: 11227964Abstract: Luminescent solar concentrators in accordance with various embodiments of the invention can be designed to minimize photon thermalization losses and incomplete light trapping using various components and techniques. Cadmium selenide core, cadmium sulfide shell (CdSe/CdS) quantum dot (“QD”) technology can be implemented in such devices to allow for near-unity QDs and sufficiently large Stokes shifts. Many embodiments of the invention include a luminescent solar concentrator that incorporates CdSe/CdS quantum dot luminophores. In further embodiments, anisotropic luminophore emission can be implemented through metasurface/plasmonic antenna coupling. In several embodiments, red-shifted luminophores are implemented. Additionally, top and bottom spectrally-selective filters, such as but not limited to selectively-reflective metasurface mirrors and polymeric stack filters, can be implemented to enhance the photon collection efficiency.Type: GrantFiled: August 27, 2018Date of Patent: January 18, 2022Assignees: California Institute of Technology, The Regents of the University of California, The Board of Trustees of the University of IllinoisInventors: David R. Needell, Noah Bronstein, Armand P. Alivisatos, Harry A. Atwater, Ralph Nuzzo, Haley Bauser, Ognjen Ilic, Junwen He, Lu Xu, Colton Bukowsky, Sunita Darbe, Zach Nett, Brent Koscher
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Publication number: 20210296622Abstract: In various embodiments a light emitting fiber is provided as well as articles of manufacture comprising one or more light emitting fibers. In certain embodiments the light emitting fiber comprises a conductive carbon nanotube fiber; an emissive layer surrounding the carbon nanotube fiber; and a conductive outer layer disposed outside the emissive layer. In certain embodiments the light emitting fiber comprises a hole transport layer disposed between the carbon nanotube fiber and the emissive layer. In certain embodiments the light emitting fiber comprise a hole injection layer disposed between the nanotube fiber and the hole transport layer. In certain embodiments the light emitting fiber comprises an electron transport layer and, optionally an electron injection layer.Type: ApplicationFiled: August 1, 2019Publication date: September 23, 2021Inventors: Armand Paul Alivisatos, Farnaz Niroui, Vida Jamali, Matteo Pasquali
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Patent number: 10717927Abstract: An indium-containing quantum dot including a compound represented by Chemical Formula 1: In1-xMxA ??Chemical Formula 1 wherein, in Chemical Formula 1, M is aluminum, gallium, yttrium, or scandium, A is nitrogen, phosphorous, arsenic, antimony, bismuth, or a combination thereof, and X is greater than or equal to 0 and less than 1, wherein the indium-containing quantum dot includes fluorine and oxygen to bonded to a surface of the indium-containing quantum dot, wherein an amount of the fluorine is greater than or equal to about 10 atomic percent based on a total number of indium atoms in the indium-containing quantum dot as determined by Rutherford backscattering analysis, and wherein an amount of the oxygen is about 5 atomic percent to about 50 atomic percent based on the total number of indium atoms included in the quantum dot as determined by Rutherford backscattering analysis.Type: GrantFiled: July 14, 2016Date of Patent: July 21, 2020Assignees: SAMSUNG ELECTRONICS CO., LTD., UNIVERSITY OF CALIFORNIA, BERKELEYInventors: Tae Gon Kim, Yehonadav Bekenstein, Eun Joo Jang, Paul Alivisatos
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Patent number: 10649098Abstract: A light converting nanoparticle represented by Chemical Formula 1, AXx??Chemical Formula 1 wherein, in Chemical Formula 1, A comprises an alkaline metal element, an alkaline-earth metal element, or a combination thereof, X comprises a halogen element, and x is 1 or 2 and is selected such that Chemical Formula 1 is electrically neutral, and a dopant substituted for a portion of A, wherein the dopant comprises Tl+, In+, Pb2+, Bi3+, Ag+, Cu+, Eu2+, Mn2+, or a combination thereof, wherein a content of the dopant is less than 15 mole percent, based on a total moles of A, wherein the light converting nanoparticle has a particle diameter of less than or equal to about 100 nanometers, and the light converting nanoparticle has a structure, cubic structure, an orthorhombic structure, a rhombic dodecahedron structure, or a combination thereof.Type: GrantFiled: January 29, 2018Date of Patent: May 12, 2020Assignees: SAMSUNG ELECTRONICS CO., LTD., THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Kwanghee Kim, Yehonadav Bekenstein, Yong Chul Kim, Paul Alivisatos, In Taek Han
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Publication number: 20190326460Abstract: Luminescent solar concentrators having a grid-based PV design can be implemented in many different ways. In several embodiments, the LSC is implemented using infrared luminophore technology combined with a PV design implementing a grid of PV cells. LSCs can incorporate quantum dots that absorb uniformly across the visible spectrum and photoluminesce down-shifted energy light in the infrared wavelength regime. Some embodiments include PV cells utilizing micro-grid structures that can be implemented for scalable and controllably transparent applications, such as but not limited to power windows targeted for building integrated photovoltaic applications. In a number of embodiments, the LSCs can utilize a unique PV cell form factor and spectral filter coatings to increase the thermal insulation of the window and enhance photocurrent capture by a silicon micro-grid.Type: ApplicationFiled: April 22, 2019Publication date: October 24, 2019Applicants: California Institute of Technology, The Regents of the University of California, The Board of Trustees of the University of IllinoisInventors: David R. Needell, Haley Bauser, Harry A. Atwater, Armand P. Alivisatos, Ralph Nuzzo, Ognjen Ilic, Colton Bukowsky, Brent A. Koscher, Megan Phelan
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Publication number: 20190314805Abstract: The invention relates to a process for producing a catalyst comprising an intermetallic compound comprising following steps: (a) Dissolving a metal selected from the group consisting of Li, Na, Ca, Sr, Ba, Eu and Yb in liquid ammonia, (b) Adding nanoparticles comprising a metal selected from the group consisting of Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au and Ru or a halide of at least one of these metals and an inorganic salt to the solution obtained in step (a), (c) Removing the liquid ammonia, (d) Annealing the mixture of step (c) at a temperature in the range between 200° C. and the melting temperature of the intermetallic compound wherein the intermetallic compound is formed, (e) Washing the intermetallic compound achieved in step (d). The invention further relates to a catalyst obtained by the process.Type: ApplicationFiled: October 18, 2017Publication date: October 17, 2019Inventors: Peter LEIDINGER, Sven TITLBACH, Stephan A. SCHUNK, Andreas HAAS, Paul ALIVISATOS, Jacob KANADY
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Publication number: 20190235094Abstract: A light converting nanoparticle represented by Chemical Formula 1, AXx ??Chemical Formula 1 wherein, in Chemical Formula 1, A comprises an alkaline metal element, an alkaline-earth metal element, or a combination thereof, X comprises a halogen element, and x is 1 or 2 and is selected such that Chemical Formula 1 is electrically neutral, and a dopant substituted for a portion of A, wherein the dopant comprises Tl+, In+, Pb2+, Bi3+, Ag+, Cu+, Eu2+, Mn2+, or a combination thereof, wherein a content of the dopant is less than 15 mole percent, based on a total moles of A, wherein the light converting nanoparticle has a particle diameter of less than or equal to about 100 nanometers, and the light converting nanoparticle has a structure, cubic structure, an orthorhombic structure, a rhombic dodecahedron structure, or a combination thereof.Type: ApplicationFiled: January 29, 2018Publication date: August 1, 2019Inventors: Kwanghee KIM, Yehonadav BEKENSTEIN, Yong Chul KIM, Paul ALIVISATOS, In Taek HAN
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Publication number: 20190067504Abstract: Luminescent solar concentrators in accordance with various embodiments of the invention can be designed to minimize photon thermalization losses and incomplete light trapping using various components and techniques. Cadmium selenide core, cadmium sulfide shell (CdSe/CdS) quantum dot (“QD”) technology can be implemented in such devices to allow for near-unity QDs and sufficiently large Stokes shifts. Many embodiments of the invention include a luminescent solar concentrator that incorporates CdSe/CdS quantum dot luminophores. In further embodiments, anisotropic luminophore emission can be implemented through metasurface/plasmonic antenna coupling. In several embodiments, red-shifted luminophores are implemented. Additionally, top and bottom spectrally-selective filters, such as but not limited to selectively-reflective metasurface mirrors and polymeric stack filters, can be implemented to enhance the photon collection efficiency.Type: ApplicationFiled: August 27, 2018Publication date: February 28, 2019Applicants: California Institute of Technology, The Regents of the University of California, The Board of Trustees of the University of lllinoisInventors: David R. Needell, Noah Bronstein, Armand P. Alivisatos, Harry A. Atwater, Ralph Nuzzo, Haley Bauser, Ognjen Ilic, Junwen He, Lu Xu
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Patent number: 10177271Abstract: This disclosure provides systems, methods, and apparatus related to photodetectors. In one aspect, a photodetector device comprises a substrate, a polycrystalline layer disposed on the substrate, and a first electrode and a second electrode disposed on the polycrystalline layer. The polycrystalline layer comprises nanograins with grain boundaries between the nanograins. The nanograins comprise a semiconductor material. A doping element comprising a halogen is segregated at the grain boundaries. A length of the polycrystalline layer is between and separating the first electrode and the second electrode.Type: GrantFiled: November 23, 2016Date of Patent: January 8, 2019Assignee: the Regents of the University of CaliforniaInventors: A. Paul Alivisatos, Miquel Salmeron, Yingjie Zhang, Daniel J. Hellebusch
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Publication number: 20180045590Abstract: Nanoscale stress-sensing can be used across fields ranging from detection of incipient cracks in structural mechanics to monitoring forces in biological tissues. We demonstrate how tetrapod quantum dots (tQDs) embedded in block-copolymers act as sensors of tensile/compressive stress. Remarkably, tQDs can detect their own composite dispersion and mechanical properties, with a switch in optomechanical response when tQDs are in direct contact. Using experimental characterizations, atomistic simulations and finite-element analyses, we show that under tensile stress, densely-packed tQDs exhibit a photoluminescence peak shifted to higher energies (“blue-shift”) due to volumetric compressive stress in their core; loosely-packed tQDs exhibit a peak shifted to lower energies (“red-shift”) from tensile stress in the core. The stress-shifts result from the tQD's unique branched morphology in which the CdS arms act as antennas that amplify the stress in the CdSe core.Type: ApplicationFiled: May 26, 2017Publication date: February 15, 2018Applicant: The Regents of the University of CaliforniaInventors: Shilpa N. Raja, Danylo Zherebetskky, Siva Wu, Peter Ercius, Andrew C.K. Olson, Paul Alivisatos, Robert O. Ritchie
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Publication number: 20180016495Abstract: An indium-containing quantum dot including a compound represented by Chemical Formula 1: In1-xMxA ??Chemical Formula 1 wherein, in Chemical Formula 1, M is aluminum, gallium, yttrium, or scandium, A is nitrogen, phosphorous, arsenic, antimony, bismuth, or a combination thereof, and X is greater than or equal to 0 and less than 1, wherein the indium-containing quantum dot includes fluorine and oxygen to bonded to a surface of the indium-containing quantum dot, wherein an amount of the fluorine is greater than or equal to about 10 atomic percent based on a total number of indium atoms in the indium-containing quantum dot as determined by Rutherford backscattering analysis, and wherein an amount of the oxygen is about 5 atomic percent to about 50 atomic percent based on the total number of indium atoms included in the quantum dot as determined by Rutherford backscattering analysis.Type: ApplicationFiled: July 14, 2016Publication date: January 18, 2018Inventors: Tae Gon KIM, Yehonadav BEKENSTEIN, Eun Joo JANG, Paul ALIVISATOS
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Publication number: 20170323998Abstract: A semiconductor nanocrystal compound and probe are described. The compound is capable of linking to one or more affinity molecules. The compound comprises (1) one or more semiconductor nanocrystals capable of, in response to exposure to a first energy, providing a second energy, and (2) one or more linking agents, having a first portion linked to the one or more semiconductor nanocrystals and a second portion capable of linking to one or more affinity molecules. One or more semiconductor nanocrystal compounds are linked to one or more affinity molecules to form a semiconductor nanocrystal probe capable of bonding with one or more detectable substances in a material being analyzed, and capable of, in response to exposure to a first energy, providing a second energy. Also described are processes for respectively: making the semiconductor nanocrystal compound; making the semiconductor nanocrystal probe; and treating materials with the probe.Type: ApplicationFiled: December 20, 2016Publication date: November 9, 2017Inventors: Shimon Weiss, Marcel Bruchez, Paul A. Alivisatos
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Patent number: 9671536Abstract: A multicolor electronic display is based on an array of luminescent semiconductor nanocrystals. Nanocrystals which emit tight of different colors are grouped into pixels. The nanocrystals are optically pumped to produce a multicolor display. Different sized nanocrystals are used to produce the different colors. A variety of pixel addressing systems can be used.Type: GrantFiled: November 9, 2015Date of Patent: June 6, 2017Assignee: The Regents of the University of CaliforniaInventors: Shimon Weiss, Michael C. Schlamp, A. Paul Alivisatos
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Publication number: 20170148938Abstract: This disclosure provides systems, methods, and apparatus related to photodetectors. In one aspect, a photodetector device comprises a substrate, a polycrystalline layer disposed on the substrate, and a first electrode and a second electrode disposed on the polycrystalline layer. The polycrystalline layer comprises nanograins with grain boundaries between the nanograins. The nanograins comprise a semiconductor material. A doping element comprising a halogen is segregated at the grain boundaries. A length of the polycrystalline layer is between and separating the first electrode and the second electrode.Type: ApplicationFiled: November 23, 2016Publication date: May 25, 2017Applicant: The Regents of the University of CaliforniaInventors: A. Paul Alivisatos, Miquel Salmeron, Yingjie Zhang, Daniel J. Hellebusch
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Patent number: 9530928Abstract: A semiconductor nanocrystal compound and probe are described. The compound is capable of linking to one or more affinity molecules. The compound comprises (1) one or more semiconductor nanocrystals capable of, in response to exposure to a first energy, providing a second energy, and (2) one or more linking agents, having a first portion linked to the one or more semiconductor nanocrystals and a second portion capable of linking to one or more affinity molecules. One or more semiconductor nanocrystal compounds are linked to one or more affinity molecules to form a semiconductor nanocrystal probe capable of bonding with one or more detectable substances in a material being analyzed, and capable of, in response to exposure to a first energy, providing a second energy. Also described are processes for respectively: making the semiconductor nanocrystal compound; making the semiconductor nanocrystal probe; and treating materials with the probe.Type: GrantFiled: December 11, 2013Date of Patent: December 27, 2016Assignee: The Regents of the University of CaliforniaInventors: Shimon Weiss, Marcel Bruchez, Paul A. Alivisatos
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Patent number: 9449787Abstract: This disclosure provides systems, methods, and apparatus related to liquid flow cells for microscopy. In one aspect, a device includes a substrate having a first and a second oxide layer disposed on surfaces of the substrate. A first and a second nitride layer are disposed on the first and second oxide layers, respectively. A cavity is defined in the first oxide layer, the first nitride layer, and the substrate, with the cavity including a third nitride layer disposed on walls of the substrate and the second oxide layer that define the cavity. A channel is defined in the second oxide layer. An inlet port and an outlet port are defined in the second nitride layer and in fluid communication with the channel. A plurality of viewports is defined in the second nitride layer. A first graphene sheet is disposed on the second nitride layer covering the plurality of viewports.Type: GrantFiled: August 4, 2015Date of Patent: September 20, 2016Assignee: The Regents of the University of CaliforniaInventors: Vivekananda P. Adiga, Gabriel Dunn, Alexander K. Zettl, A. Paul Alivisatos
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Patent number: 9412556Abstract: This disclosure provides systems, methods, and devices related to transmission electron microscopy cells for use with liquids. In one aspect a device includes a substrate, a first graphene layer, and a second graphene layer. The substrate has a first surface and a second surface. The first surface defines a first channel, a second channel, and an outlet channel. The first channel and the second channel are joined to the outlet channel. The outlet channel defines a viewport region forming a though hole in the substrate. The first graphene layer overlays the first surface of the substrate, including an interior area of the first channel, the second channel, and the outlet channel. The second graphene layer overlays the first surface of the substrate, including open regions defined by the first channel, the second channel, and the outlet channel.Type: GrantFiled: October 27, 2014Date of Patent: August 9, 2016Assignee: The Regents of the University of CaliforniaInventors: Waqas Khalid, A. Paul Alivisatos, Alexander K. Zettl
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Publication number: 20160139307Abstract: A multicolor electronic display is based on an array of luminescent semiconductor nanocrystals. Nanocrystals which emit tight of different colors are grouped into pixels. The nanocrystals are optically pumped to produce a multicolor display. Different sized nanocrystals are used to produce the different colors. A variety of pixel addressing systems can be used.Type: ApplicationFiled: November 9, 2015Publication date: May 19, 2016Inventors: Shimon Weiss, Michael C. Schlamp, A. Paul Alivisatos
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Publication number: 20160042912Abstract: This disclosure provides systems, methods, and apparatus related to liquid flow cells for microscopy. In one aspect, a device includes a substrate having a first and a second oxide layer disposed on surfaces of the substrate. A first and a second nitride layer are disposed on the first and second oxide layers, respectively. A cavity is defined in the first oxide layer, the first nitride layer, and the substrate, with the cavity including a third nitride layer disposed on walls of the substrate and the second oxide layer that define the cavity. A channel is defined in the second oxide layer. An inlet port and an outlet port are defined in the second nitride layer and in fluid communication with the channel. A plurality of viewports is defined in the second nitride layer. A first graphene sheet is disposed on the second nitride layer covering the plurality of viewports.Type: ApplicationFiled: August 4, 2015Publication date: February 11, 2016Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Vivekananda P. Adiga, Gabriel Dunn, Alexander K. Zettl, A. Paul Alivisatos