Patents by Inventor Costas P. Grigoropoulos
Costas P. Grigoropoulos 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: 20150064057Abstract: A method for producing a nickel-containing surface coating that is metallic and conductive is provided. The method includes contacting a surface of a substrate with a liquid composition that includes nickel oxide nanoparticles, and modifying the nickel oxide nanoparticles to produce a nickel-containing metallic and conductive surface coating on the surface of the substrate. Also provided are nickel-containing (e.g., NiO and Ni containing) surface coatings and methods for making a liquid composition that includes nickel oxide nanoparticles. The methods and compositions find use in a variety of different applications.Type: ApplicationFiled: August 5, 2014Publication date: March 5, 2015Inventors: Costas P. Grigoropoulos, Daeho Lee
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Patent number: 8728720Abstract: Methods of producing a nanostructure in a target film are provided. The method includes selectively irradiating at least one focusing element of a near-field focusing array that is in near-field focusing relationship with a target film in a manner sufficient to produce a nanostructure from the target film. Also provided are systems for practicing methods of the invention, as well as objects produced thereby.Type: GrantFiled: June 8, 2011Date of Patent: May 20, 2014Assignee: The Regents of the University of CaliforniaInventors: David Jen Hwang, Costas P. Grigoropoulos
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Patent number: 8580130Abstract: Laser-assisted apparatus and methods for performing nanoscale material processing, including nanodeposition of materials, can be controlled very precisely to yield both simple and complex structures with sizes less than 100 nm. Optical or thermal energy in the near field of a photon (laser) pulse is used to fabricate submicron and nanometer structures on a substrate. A wide variety of laser material processing techniques can be adapted for use including, subtractive (e.g., ablation, machining or chemical etching), additive (e.g., chemical vapor deposition, selective self-assembly), and modification (e.g., phase transformation, doping) processes. Additionally, the apparatus can be integrated into imaging instruments, such as SEM and TEM, to allow for real-time imaging of the material processing.Type: GrantFiled: December 16, 2008Date of Patent: November 12, 2013Assignee: The Regents of the University of CaliforniaInventors: Samuel S. Mao, Costas P. Grigoropoulos, David J. Hwang, Andrew M. Minor
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Publication number: 20120206722Abstract: Provided are laser induced breakdown spectroscopy (LIBS) devices. Embodiments of the devices are configured to obtain a spatial resolution of 10 ?m or less. Also provided are methods of using the subject LIBS devices to determine whether one or more elements of interest are present in a target sample. The devices and methods find use in a variety of applications, e.g., submicron and nanoscale chemical analysis applications.Type: ApplicationFiled: June 7, 2011Publication date: August 16, 2012Inventors: Costas P. Grigoropoulos, David Jen Hwang, Jong Hyun Yoo, Richard E. Russo
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Publication number: 20110318695Abstract: Methods of producing a nanostructure in a target film are provided. The method includes selectively irradiating at least one focusing element of a near-field focusing array that is in near-field focusing relationship with a target film in a manner sufficient to produce a nanostructure from the target film. Also provided are systems for practicing methods of the invention, as well as objects produced thereby.Type: ApplicationFiled: June 8, 2011Publication date: December 29, 2011Inventors: David Jen Hwang, Costas P. Grigoropoulos
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Patent number: 7994029Abstract: A method for patterning crystalline indium tin oxide (ITO) using femtosecond laser is disclosed, which comprises steps of: (a) providing a substrate with an amorphous ITO layer thereon; (b) transferring the amorphous ITO layer in a predetermined area into a crystalline ITO layer by emitting a femtosecond laser beam to the amorphous ITO layer in the predetermined area; and (c) removing the amorphous ITO layer on the substrate using an etching solution.Type: GrantFiled: January 22, 2009Date of Patent: August 9, 2011Assignees: Industrial Technology Research Institute, The Regents of the University of CaliforniaInventors: Chung-Wei Cheng, Costas P. Grigoropoulos, David Jen Hwang, Moosung Kim
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Patent number: 7985367Abstract: A method for producing active glass nanoparticles that exhibit upconversion is described. The method employs pulsed-laser ablation of an active glass substrate using, for example, a high repetition rate ultra-short pulse duration laser under normal atmospheric conditions or in a liquid environment.Type: GrantFiled: July 31, 2009Date of Patent: July 26, 2011Assignee: The Regents of the University of CaliforniaInventors: Kuniaki Hiromatsu, David Jen Hwang, Costas P. Grigoropoulos
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Publication number: 20100320171Abstract: Laser-assisted apparatus and methods for performing nanoscale material processing, including nanodeposition of materials, can be controlled very precisely to yield both simple and complex structures with sizes less than 100 nm. Optical or thermal energy in the near field of a photon (laser) pulse is used to fabricate submicron and nanometer structures on a substrate. A wide variety of laser material processing techniques can be adapted for use including, subtractive (e.g., ablation, machining or chemical etching), additive (e.g., chemical vapor deposition, selective self-assembly), and modification (e.g., phase transformation, doping) processes. Additionally, the apparatus can be integrated into imaging instruments, such as SEM and TEM, to allow for real-time imaging of the material processing.Type: ApplicationFiled: December 16, 2008Publication date: December 23, 2010Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Samuel S. Mao, Costas P. Grigoropoulos, David Hwang, Andrew M. Minor
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Patent number: 7786024Abstract: Methods, systems, and apparatuses for annealing semiconductor nanowires and for fabricating electrical devices are provided. Nanowires are deposited on a substrate. A plurality of electrodes is formed. The nanowires are in electrical contact with the plurality of electrodes. The nanowires are doped. A polarized laser beam is applied to the nanowires to anneal at least a portion of the nanowires. The nanowires may be aligned substantially parallel to an axis. The laser beam may be polarized in various ways to modify absorption of radiation of the applied laser beam by the nanowires. For example, the laser beam may be polarized in a direction substantially parallel to the axis or substantially perpendicular to the axis to enable different nanowire absorption profiles.Type: GrantFiled: November 7, 2007Date of Patent: August 31, 2010Assignees: Nanosys, Inc., Regents of the University of CaliforniaInventors: David P. Stumbo, Yaoling Pan, Costas P. Grigoropoulos, Nipun Misra
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Publication number: 20100072645Abstract: A method for producing active glass nanoparticles that exhibit upconversion is described. The method employs pulsed-laser ablation of an active glass substrate using, for example, a high repetition rate ultra-short pulse duration laser under normal atmospheric conditions or in a liquid environment.Type: ApplicationFiled: July 31, 2009Publication date: March 25, 2010Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Kuniaki Hiromatsu, David Jen Hwang, Costas P. Grigoropoulos
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Publication number: 20090221141Abstract: A method for patterning crystalline indium tin oxide (ITO) using femtosecond laser is disclosed, which comprises steps of: (a) providing a substrate with an amorphous ITO layer thereon; (b) transferring the amorphous ITO layer in a predetermined area into a crystalline ITO layer by emitting a femtosecond laser beam to the amorphous ITO layer in the predetermined area; and (c) removing the amorphous ITO layer on the substrate using an etching solution.Type: ApplicationFiled: January 22, 2009Publication date: September 3, 2009Applicants: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: CHUNG-WEI CHENG, COSTAS P. GRIGOROPOULOS, DAVID JEN HWANG, MOOSUNG KIM
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Publication number: 20090130427Abstract: The invention relates to the deposition or transfer of material using a laser induced forward transfer process. More specifically, the invention relates to the transfer of material using a laser induced forward transfer process wherein the transfer process is facilitated or enabled by nanomaterials. Nanomaterials in the form of nanoparticles or nanofilms may be employed, optionally including a surface coating or self-assembled monolayer surface coating, making use of properties of the nanomaterials that allow the laser induced forward transfer process to be practiced at irradiation energies and temperatures lower than commonly used. The technique may be well suited for depositing organic layers.Type: ApplicationFiled: October 22, 2008Publication date: May 21, 2009Applicants: The Regents of the University of California, AppliFlex LLCInventors: Costas P. Grigoropoulos, Seung H. KO, Hee K. Park
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Publication number: 20080150165Abstract: Methods, systems, and apparatuses for annealing semiconductor nanowires and for fabricating electrical devices are provided. Nanowires are deposited on a substrate. A plurality of electrodes is formed. The nanowires are in electrical contact with the plurality of electrodes. The nanowires are doped. A polarized laser beam is applied to the nanowires to anneal at least a portion of the nanowires. The nanowires may be aligned substantially parallel to an axis. The laser beam may be polarized in various ways to modify absorption of radiation of the applied laser beam by the nanowires. For example, the laser beam may be polarized in a direction substantially parallel to the axis or substantially perpendicular to the axis to enable different nanowire absorption profiles.Type: ApplicationFiled: November 7, 2007Publication date: June 26, 2008Applicant: NANOSYS, INC.Inventors: David P. Stumbo, Yaoling Pan, Costas P. Grigoropoulos, Nipun Misra
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Patent number: 6635932Abstract: A layer of material is transformed from a first state to a second state by the application of energy from an energy beam. For example, large direction- and location-controlled p-Si grain growth utilizes recrystallization of amorphous silicon from superpositioned laser irradiation. The superpositioned laser irradiation controls cooling and solidification processes that determine the resulting crystal structure. Specifically, a first laser beam of a first pulse duration is used to melt an amorphous silicon (a-Si) film and to create a temperature gradient. After an initial delay, a second laser beam with shorter pulse duration is superpositioned with the first laser beam. When a-Si is irradiated by the second laser beam, the area heated by the first laser beam becomes completely molten. Spontaneous nucleation is initiated in the supercooled liquid-Si when the liquid-Si temperature drops below the nucleation temperature.Type: GrantFiled: August 6, 2002Date of Patent: October 21, 2003Assignees: The Regents of the University of California, Hitachi America, Ltd.Inventors: Costas P. Grigoropoulos, Mutsuko Hatano, Ming-Hong Lee, Seung-Jae Moon
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Publication number: 20030003636Abstract: A layer of material is transformed from a first state to a second state by the application of energy from an energy beam. For example, large direction- and location-controlled p-Si grain growth utilizes recrystallization of amorphous silicon from superpositioned laser irradiation. The superpositioned laser irradiation controls cooling and solidification processes that determine the resulting crystal structure. Specifically, a first laser beam of a first pulse duration is used to melt an amorphous silicon (a-Si) film and to create a temperature gradient. After an initial delay, a second laser beam with shorter pulse duration is superpositioned with the first laser beam. When a-Si is irradiated by the second laser beam, the area heated by the first laser beam becomes completely molten. Spontaneous nucleation is initiated in the supercooled liquid-Si when the liquid-Si temperature drops below the nucleation temperature.Type: ApplicationFiled: August 6, 2002Publication date: January 2, 2003Applicant: The Regents of the University of CaliforniaInventors: Costas P. Grigoropoulos, Mutsuko Hatano, Ming-Hong Lee, Seung-Jae Moon
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Patent number: 6451631Abstract: A layer of material is transformed from a first state to a second state by the application of energy from an energy beam. For example, large direction- and location-controlled p-Si grain growth utilizes recrystallization of amorphous silicon from superpositioned laser irradiation. The superpositioned laser irradiation controls cooling and solidification processes that determine the resulting crystal structure. Specifically, a first laser beam of a first pulse duration is used to melt an amorphous silicon (a-Si) film and to create a temperature gradient. After an initial delay, a second laser beam with shorter pulse duration is superpositioned with the first laser beam. When a-Si is irradiated by the second laser beam, the area heated by the first laser beam becomes completely molten. Spontaneous nucleation is initiated in the supercooled liquid-Si when the liquid-Si temperature drops below the nucleation temperature.Type: GrantFiled: August 10, 2000Date of Patent: September 17, 2002Assignees: Hitachi America, Ltd., Regents of the University of CaliforniaInventors: Costas P. Grigoropoulos, Mutsuko Hatano, Ming-Hong Lee, Seung-Jae Moon