Patents by Inventor A. Paul Alivisatos

A. Paul 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).

  • Publication number: 20190235094
    Abstract: 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: Application
    Filed: January 29, 2018
    Publication date: August 1, 2019
    Inventors: Kwanghee KIM, Yehonadav BEKENSTEIN, Yong Chul KIM, Paul ALIVISATOS, In Taek HAN
  • Patent number: 10177271
    Abstract: 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: Grant
    Filed: November 23, 2016
    Date of Patent: January 8, 2019
    Assignee: the Regents of the University of California
    Inventors: A. Paul Alivisatos, Miquel Salmeron, Yingjie Zhang, Daniel J. Hellebusch
  • Publication number: 20180045590
    Abstract: 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: Application
    Filed: May 26, 2017
    Publication date: February 15, 2018
    Applicant: The Regents of the University of California
    Inventors: Shilpa N. Raja, Danylo Zherebetskky, Siva Wu, Peter Ercius, Andrew C.K. Olson, Paul Alivisatos, Robert O. Ritchie
  • Publication number: 20180016495
    Abstract: 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: Application
    Filed: July 14, 2016
    Publication date: January 18, 2018
    Inventors: Tae Gon KIM, Yehonadav BEKENSTEIN, Eun Joo JANG, Paul ALIVISATOS
  • Publication number: 20170323998
    Abstract: 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: Application
    Filed: December 20, 2016
    Publication date: November 9, 2017
    Inventors: Shimon Weiss, Marcel Bruchez, Paul A. Alivisatos
  • Patent number: 9671536
    Abstract: 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: Grant
    Filed: November 9, 2015
    Date of Patent: June 6, 2017
    Assignee: The Regents of the University of California
    Inventors: Shimon Weiss, Michael C. Schlamp, A. Paul Alivisatos
  • Publication number: 20170148938
    Abstract: 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: Application
    Filed: November 23, 2016
    Publication date: May 25, 2017
    Applicant: The Regents of the University of California
    Inventors: A. Paul Alivisatos, Miquel Salmeron, Yingjie Zhang, Daniel J. Hellebusch
  • Patent number: 9530928
    Abstract: 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: Grant
    Filed: December 11, 2013
    Date of Patent: December 27, 2016
    Assignee: The Regents of the University of California
    Inventors: Shimon Weiss, Marcel Bruchez, Paul A. Alivisatos
  • Patent number: 9449787
    Abstract: 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: Grant
    Filed: August 4, 2015
    Date of Patent: September 20, 2016
    Assignee: The Regents of the University of California
    Inventors: Vivekananda P. Adiga, Gabriel Dunn, Alexander K. Zettl, A. Paul Alivisatos
  • Patent number: 9412556
    Abstract: 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: Grant
    Filed: October 27, 2014
    Date of Patent: August 9, 2016
    Assignee: The Regents of the University of California
    Inventors: Waqas Khalid, A. Paul Alivisatos, Alexander K. Zettl
  • Publication number: 20160139307
    Abstract: 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: Application
    Filed: November 9, 2015
    Publication date: May 19, 2016
    Inventors: Shimon Weiss, Michael C. Schlamp, A. Paul Alivisatos
  • Publication number: 20160042912
    Abstract: 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: Application
    Filed: August 4, 2015
    Publication date: February 11, 2016
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Vivekananda P. Adiga, Gabriel Dunn, Alexander K. Zettl, A. Paul Alivisatos
  • Patent number: 9182621
    Abstract: 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: Grant
    Filed: February 24, 2015
    Date of Patent: November 10, 2015
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Shimon Weiss, Michael C. Schlamp, A. Paul Alivisatos
  • Publication number: 20150177560
    Abstract: 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: Application
    Filed: February 24, 2015
    Publication date: June 25, 2015
    Inventors: Shimon Weiss, Michael C. Schlamp, A. Paul Alivisatos
  • Patent number: 9063363
    Abstract: A multicolor electronic display is based on an array of luminescent semiconductor nanocrystals. Nanocrystals which emit light 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: Grant
    Filed: March 24, 2014
    Date of Patent: June 23, 2015
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Shimon Weiss, Michael C. Schlamp, A. Paul Alivisatos
  • Publication number: 20150118126
    Abstract: 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: Application
    Filed: October 27, 2014
    Publication date: April 30, 2015
    Applicant: The Regents of the University of California
    Inventors: Waqas Khalid, A. Paul Alivisatos, Alexander K. Zettl
  • Patent number: 8889414
    Abstract: Methods for determining metabolic properties of living cells through the uptake of semiconductor nanocrystals by cells. Generally the methods require a layer of neutral or hydrophilic semiconductor nanocrystals and a layer of cells seeded onto a culture surface and changes in the layer of semiconductor nanocrystals are detected. The observed changes made to the layer of semiconductor nanocrystals can be correlated to such metabolic properties as metastatic potential, cell motility or migration.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: November 18, 2014
    Assignee: The Regents of the University of California
    Inventors: A. Paul Alivisatos, Carolyn A. Larabell, Wolfgang J. Parak, Mark Le Gros, Rosanne Boudreau
  • Publication number: 20140204295
    Abstract: A multicolor electronic display is based on an array of luminescent semiconductor nanocrystals. Nanocrystals which emit light 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: Application
    Filed: March 24, 2014
    Publication date: July 24, 2014
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Shimon Weiss, Michael C. Schlamp, A. Paul Alivisatos
  • Publication number: 20140179046
    Abstract: 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: Application
    Filed: December 11, 2013
    Publication date: June 26, 2014
    Applicant: The Regents of the University of California
    Inventors: Shimon Weiss, Marcel Bruchez, Paul A. Alivisatos
  • Patent number: 8753916
    Abstract: The invention described herein provides for thin films and methods of making comprising inorganic semiconductor-nanocrystals dispersed in semiconducting-polymers in high loading amounts. The invention also describes photovoltaic devices incorporating the thin films.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: June 17, 2014
    Assignee: The Regents of The University of California
    Inventors: A. Paul Alivisatos, Janke J. Dittmer, Wendy U. Huynh, Delia Milliron