Patents by Inventor Palash Gangopadhyay
Palash Gangopadhyay 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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Patent number: 11728099Abstract: An asymmetric supercapacitor having a positive electrode, a negative electrode and a biasing electrode disposed between the positive electrode and negative electrode. The biasing electrode accumulates a mass-balanced equivalent amount of charge as the supercapacitor is charging, and an independent voltage applied to the biasing electrode causes charge to be forced to the positive electrode or the negative electrode maintaining an equilibrium in the charge double layer.Type: GrantFiled: October 2, 2020Date of Patent: August 15, 2023Assignee: Urbix, Inc.Inventor: Palash Gangopadhyay
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Publication number: 20210104369Abstract: An asymmetric supercapacitor having a positive electrode, a negative electrode and a biasing electrode disposed between the positive electrode and negative electrode. The biasing electrode accumulates a mass-balanced equivalent amount of charge as the supercapacitor is charging, and an independent voltage applied to the biasing electrode causes charge to be forced to the positive electrode or the negative electrode maintaining an equilibrium in the charge double layer. In one embodiment, the operating voltage is about 5.5-7.4V in a coin cell form factor. The positive and biasing electrodes are made of the same material and in one embodiment are made of activated charcoal and graphene nanoplatelets. The negative electrode may also comprise activated charcoal and graphene nanoplatelets in a different amount than the positive electrode such that the weight ratio of the positive electrode to the negative electrode is not 1:1. The negative electrode may also comprise lithiated graphite.Type: ApplicationFiled: October 2, 2020Publication date: April 8, 2021Applicant: Urbix Resources, LLCInventor: Palash Gangopadhyay
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Patent number: 10614966Abstract: Embodiments of the present disclosure are directed to carbon-containing composites which are suitable for use as electrodes in electrochemical systems. The composites are formed from a scaffold of graphene and carbon nanotubes. Graphene flakes form a plurality of generally planar sheets (e.g., extending in an x-y plane) separated in the direction of a composite axis (e.g., along a z-axis) and approximately parallel to one another. The carbon nanotubes extend between the graphene sheets and at least a portion of the carbon nanotubes are aligned in approximately the same direction, at a defined angle with respect to the composite axis. At least a portion of the scaffold is embedded within a porous carbon matrix (e.g., an activated carbon, a polymer derived graphitic carbon, etc.).Type: GrantFiled: August 11, 2015Date of Patent: April 7, 2020Assignee: Arizona Board of Regents on Behalf of the University of ArizonaInventors: Palash Gangopadhyay, Scott H. Tan
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Publication number: 20180108448Abstract: In an exemplary method, a nano-architectured carbon structure is fabricated by forming a unit (e.g., a film) of a liquid carbon-containing starting material and at least one dopant. A surface of the unit is nano-molded using a durable mold that is pre-formed with a pattern of nano-concavities corresponding to a desired pattern of nano-features to be formed by the mold on the surface of the unit. After nano-molding the surface of the unit, the first unit is stabilized to render the unit and its formed nano-structures capable of surviving downstream steps. The mold is removed from the first surface to form a nano-molded surface of a carbonization precursor. The precursor is carbonized in an inert-gas atmosphere at a suitable high temperature to form a corresponding nano-architectured carbon structure. A principal use of the nano-architectured carbon structure is a carbon electrode used in, e.g., Li-ion batteries, supercapacitors, and battery-supercapacitor hybrid devices.Type: ApplicationFiled: December 8, 2017Publication date: April 19, 2018Applicant: Arizona Board of Regents on Behalf of the Universi ty of ArizonaInventors: Jayan Thomas, Palash Gangopadhyay, Binh Au Thanh Duong
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Patent number: 9842667Abstract: In an exemplary method, a nano-architectured carbon structure is fabricated by forming a unit (e.g., a film) of a liquid carbon-containing starting material and at least one dopant. A surface of the unit is nano-molded using a durable mold that is pre-formed with a pattern of nano-concavities corresponding to a desired pattern of nano-features to be formed by the mold on the surface of the unit. After nano-molding the surface of the unit, the first unit is stabilized to render the unit and its formed nano-structures capable of surviving downstream steps. The mold is removed from the first surface to form a nano-molded surface of a carbonization precursor. The precursor is carbonized in an inert-gas atmosphere at a suitable high temperature to form a corresponding nano-architectured carbon structure. A principal use of the nano-architectured carbon structure is a carbon electrode used in, e.g., Li-ion batteries, supercapacitors, and battery-supercapacitor hybrid devices.Type: GrantFiled: December 27, 2010Date of Patent: December 12, 2017Assignee: The Arizona Board of Regents on Behalf of the University of ArizonaInventors: Jayan Thomas, Palash Gangopadhyay, Binh Au Thanh Duong
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Publication number: 20170221645Abstract: Embodiments of the present disclosure are directed to carbon-containing composites which are suitable for use as electrodes in electrochemical systems. The composites are formed from a scaffold of graphene and carbon nanotubes. Graphene flakes form a plurality of generally planar sheets (e.g., extending in an x-y plane) separated in the direction of a composite axis (e.g., along a z-axis) and approximately parallel to one another. The carbon nanotubes extend between the graphene sheets and at least a portion of the carbon nanotubes are aligned in approximately the same direction, at a defined angle with respect to the composite axis. At least a portion of the scaffold is embedded within a porous carbon matrix (e.g., an activated carbon, a polymer derived graphitic carbon, etc.).Type: ApplicationFiled: August 11, 2015Publication date: August 3, 2017Inventors: Palash GANGOPADHYAY, Scott H. TAN
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Patent number: 9446956Abstract: A method of purifying a nanodiamond powder includes preparing the nanodiamond powder, heating the nanodiamond powder at between 450° C. and 470° C. in an atmosphere including oxygen, performing a hydrochloric acid treatment on the heated nanodiamond powder, and performing a hydrofluoric acid treatment on the nanodiamond powder obtained after performing the hydrochloric acid treatment.Type: GrantFiled: January 9, 2015Date of Patent: September 20, 2016Assignees: The Arizona Board of Regents on Behalf of the University of Arizona, Canon Kabushiki KaishaInventors: Palash Gangopadhyay, Robert A. Norwood, Alexander Ashton Miles, Jun Kato, Shabnam Virji, Mamoru Miyawaki
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Patent number: 9378880Abstract: Methods are disclosed for synthesizing nanocomposite materials including ferromagnetic nanoparticles with polymer shells formed by controlled surface polymerization. The polymer shells prevent the nanoparticles from forming agglomerates and preserve the size dispersion of the nanoparticles. The nanocomposite particles can be further networked in suitable polymer hosts to tune mechanical, optical, and thermal properties of the final composite polymer system. An exemplary method includes forming a polymer shell on a nanoparticle surface by adding molecules of at least one monomer and optionally of at least one tethering agent to the nanoparticles, and then exposing to electromagnetic radiation at a wavelength selected to induce bonding between the nanoparticle and the molecules, to form a polymer shell bonded to the particle and optionally to a polymer host matrix. The nanocomposite materials can be used in various magneto-optic applications.Type: GrantFiled: March 16, 2015Date of Patent: June 28, 2016Assignee: The Arizona Board of Regents on Behalf of the University of ArizonaInventors: Palash Gangopadhyay, Alejandra Lopez-Santiago, Robert A. Norwood
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Publication number: 20150221425Abstract: Methods are disclosed for synthesizing nanocomposite materials including ferromagnetic nanoparticles with polymer shells formed by controlled surface polymerization. The polymer shells prevent the nanoparticles from forming agglomerates and preserve the size dispersion of the nanoparticles. The nanocomposite particles can be further networked in suitable polymer hosts to tune mechanical, optical, and thermal properties of the final composite polymer system. An exemplary method includes forming a polymer shell on a nanoparticle surface by adding molecules of at least one monomer and optionally of at least one tethering agent to the nanoparticles, and then exposing to electromagnetic radiation at a wavelength selected to induce bonding between the nanoparticle and the molecules, to form a polymer shell bonded to the particle and optionally to a polymer host matrix. The nanocomposite materials can be used in various magneto-optic applications.Type: ApplicationFiled: March 16, 2015Publication date: August 6, 2015Inventors: Palash Gangopadhyay, Alejandra Lopez-Santiago, Robert A. Norwood
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Publication number: 20150125379Abstract: A method of purifying a nanodiamond powder includes preparing the nanodiamond powder, heating the nanodiamond powder at between 450° C. and 470° C. in an atmosphere including oxygen, performing a hydrochloric acid treatment on the heated nanodiamond powder, and performing a hydrofluoric acid treatment on the nanodiamond powder obtained after performing the hydrochloric acid treatment.Type: ApplicationFiled: January 9, 2015Publication date: May 7, 2015Inventors: Palash Gangopadhyay, Robert A. Norwood, Alexander Ashton Miles, Jun Kato, Shabnam Virji-Khalfan, Mamoru Miyawaki
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Patent number: 9011710Abstract: Methods are disclosed for synthesizing nanocomposite materials including ferromagnetic nanoparticles with polymer shells formed by controlled surface polymerization. The polymer shells prevent the nanoparticles from forming agglomerates and preserve the size dispersion of the nanoparticles. The nanocomposite particles can be further networked in suitable polymer hosts to tune mechanical, optical, and thermal properties of the final composite polymer system. An exemplary method includes forming a polymer shell on a nanoparticle surface by adding molecules of at least one monomer and optionally of at least one tethering agent to the nanoparticles, and then exposing to electromagnetic radiation at a wavelength selected to induce bonding between the nanoparticle and the molecules, to form a polymer shell bonded to the particle and optionally to a polymer host matrix. The nanocomposite materials can be used in various magneto-optic applications.Type: GrantFiled: April 1, 2010Date of Patent: April 21, 2015Assignee: Arizona Board of Regents on behalf of the University of ArizonaInventors: Palash Gangopadhyay, Alejandra Lopez-Santiago, Robert A. Norwood
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Patent number: 8940267Abstract: A method of purifying a nanodiamond powder includes preparing the nanodiamond powder, heating the nanodiamond powder at between 450° C. and 470° C. in an atmosphere including oxygen, performing a hydrochloric acid treatment on the heated nanodiamond powder, and performing a hydrofluoric acid treatment on the nanodiamond powder obtained after performing the hydrochloric acid treatment.Type: GrantFiled: June 28, 2012Date of Patent: January 27, 2015Assignees: The Arizona Board of Regents on Behalf of the University of Arizona, Canon Kabushiki KaishaInventors: Robert A. Norwood, Palash Gangopadhyay, Alexander Ashton Miles, Jun Kato, Shabnam Virji-Khalfan, Mamoru Miyawaki
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Patent number: 8859423Abstract: Embodiments of methods for fabricating polymer nanostructures and nanostructured electrodes are disclosed. Material layers are deposited onto polymer nanostructures to form nanostructured electrodes and devices including the nanostructured electrodes, such as photovoltaic cells, light-emitting diodes, and field-effect transistors. Embodiments of the disclosed methods are suitable for commercial-scale production of large-area nanostructured polymer scaffolds and large-area nanostructured electrodes.Type: GrantFiled: August 11, 2011Date of Patent: October 14, 2014Assignee: The Arizona Board of Regents on behalf of the University of ArizonaInventors: Jayan Thomas, Nasser N. Peyghambarian, Robert A. Norwood, Palash Gangopadhyay, Akram A. Khosroabadi
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Publication number: 20140004031Abstract: A method of purifying a nanodiamond powder includes preparing the nanodiamond powder, heating the nanodiamond powder at between 450° C. and 470° C. in an atmosphere including oxygen, performing a hydrochloric acid treatment on the heated nanodiamond powder, and performing a hydrofluoric acid treatment on the nanodiamond powder obtained after performing the hydrochloric acid treatment.Type: ApplicationFiled: June 28, 2012Publication date: January 2, 2014Applicants: Arizona Board of Regents on Behalf of The University of Arizona, CANON KABUSHIKI KAISHAInventors: Robert A. Norwood, Palash Gangopadhyay, Alexander Ashton Miles, Jun Kato, Shabnam Virji-Khalfan, Mamoru Miyawaki
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Publication number: 20130143414Abstract: Embodiments of methods for fabricating polymer nanostructures and nanostructured electrodes are disclosed. Material layers are deposited onto polymer nanostructures to form nanostructured electrodes and devices including the nanostructured electrodes, such as photovoltaic cells, light-emitting diodes, and field-effect transistors. Embodiments of the disclosed methods are suitable for commercial-scale production of large-area nanostructured polymer scaffolds and large-area nanostructured electrodes.Type: ApplicationFiled: August 11, 2011Publication date: June 6, 2013Applicant: Arizona Board of Regents on Behalf of the University of ArizonaInventors: Jayan Thomas, Nasser N. Peyghambarian, Robert A. Norwood, Palash Gangopadhyay
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Publication number: 20130069011Abstract: In an exemplary method, a nano-architectured carbon structure is fabricated by forming a unit (e.g., a film) of a liquid carbon-containing starting material and at least one dopant. A surface of the unit is nano-molded using a durable mold that is pre-formed with a pattern of nano-concavities corresponding to a desired pattern of nano-features to be formed by the mold on the surface of the unit. After nano-molding the surface of the unit, the first unit is stabilized to render the unit and its formed nano-structures capable of surviving downstream steps. The mold is removed from the first surface to form a nano-molded surface of a carbonization precursor. The precursor is carbonized in an inert-gas atmosphere at a suitable high temperature to form a corresponding nano-architectured carbon structure. A principal use of the nano-architectured carbon structure is a carbon electrode used in, e.g., Li-ion batteries, supercapacitors, and battery-supercapacitor hybrid devices.Type: ApplicationFiled: December 27, 2010Publication date: March 21, 2013Applicant: The Arizona Board of Regents on Behalf of the University of ArizonaInventors: Jayan Thomas, Palash Gangopadhyay, Binh Au Thanh Duong
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Publication number: 20120088159Abstract: In an exemplary method, a nano-architectured carbon structure is fabricated by forming a unit (e.g., a film) of a liquid carbon-containing starting material. A surface of the unit is nano-molded using a durable mold (122) that is pre-formed with a pattern of nano-concavities corresponding to a desired pattern of nano-features to be formed by the mold on the surface of the unit. After nano-molding the surface of the unit, the first unit is stabilized to render the unit and its formed nano-structures capable of surviving downstream steps. The mold is removed from the first surface to form a nano-molded surface of a carbonization precursor (152). The precursor is carbonized in an inert-gas atmosphere at a suitable high temperature to form a corresponding nano-architectured carbon structure (62). A principal use of the nano-architectured carbon structure is a carbon electrode used in, e.g., Li-ion batteries, supercapacitors, and battery-supercapacitor hybrid devices.Type: ApplicationFiled: June 28, 2010Publication date: April 12, 2012Inventors: Jayan Thomas, Nasser N. Peyghambarian, Andre P. Persoons, Palash Gangopadhyay, Sujung Feilen
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Publication number: 20120052286Abstract: Composites, designed “MNPC” materials, are formed by methods of which an exemplary method includes preparing a liquid suspension of magnetic nanoparticles in a carrier liquid in which the nanoparticles are not soluble. The carrier liquid can form a rigid polymer matrix for the nanoparticles whenever the carrier liquid is exposed to a rigidification condition. A first rigidification condition is applied to the suspension to rigidify the carrier liquid into the polymer matrix and thus form a rigid MNPC material. A fluidizing condition is applied to the rigid MNPC material to fluidize the matrix and allow movement of the nanoparticles in the matrix. While the matrix is fluid, the MNPC material is magnetically poled by exposure to an external magnetic field. Poling aligns at least some of the nanoparticles with the field and allows at least some particles to self-assemble with each other.Type: ApplicationFiled: May 14, 2010Publication date: March 1, 2012Inventors: Robert A. Norwood, Jayan Thomas, Palash Gangopadhyay, Alejandra Lopez-Santiago
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Publication number: 20120043495Abstract: Methods are disclosed for synthesizing nanocomposite materials including ferromagnetic nanoparticles with polymer shells formed by controlled surface polymerization. The polymer shells prevent the nanoparticles from forming agglomerates and preserve the size dispersion of the nanoparticles. The nanocomposite particles can be further networked in suitable polymer hosts to tune mechanical, optical, and thermal properties of the final composite polymer system. An exemplary method includes forming a polymer shell on a nanoparticle surface by adding molecules of at least one monomer and optionally of at least one tethering agent to the nanoparticles, and then exposing to electromagnetic radiation at a wavelength selected to induce bonding between the nanoparticle and the molecules, to form a polymer shell bonded to the particle and optionally to a polymer host matrix. The nanocomposite materials can be used in various magneto-optic applications.Type: ApplicationFiled: April 1, 2010Publication date: February 23, 2012Inventors: Palash Gangopadhyay, Alejandra Lopez-Santiago, Robert A. Norwood