Patents by Inventor Munir H. Nayfeh
Munir H. Nayfeh 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: 20200274037Abstract: Nanophosphors are provided comprising a nanoparticle core having an attached shell of smaller silicon nanoparticles attached via hydrogen bonding. Example methods for forming a nanophosphor comprise providing a silicon nanoparticle (SiNp) colloid including Si nanoparticles, and transferring the colloid to a solid state comprising silica and/or phosphor particles. Drying is allowed such that the Si nanoparticles form a coating on the particles with hydrogen bonds.Type: ApplicationFiled: August 1, 2019Publication date: August 27, 2020Inventors: Munir H. NAYFEH, Aman TAUKENOV
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Patent number: 10072991Abstract: A nanoparticle sensor apparatus includes a silicon-based nanoparticle having a centrosymmetric crystalline structure. A lanthanide atom embedded within the silicon-based nanoparticle provides light emission when the sensor apparatus undergoes pressure loading. This sensor apparatus may be encapsulated in a polymer matrix to form a nanoparticle sensor matrix apparatus which may be located on or in a structure. To measure the pressure on such a structure, a UV light source illuminates the sensor apparatus. An optical emission detector detects the intensity of light emitted from the sensor in response, while a processor correlates that intensity to the pressure loading.Type: GrantFiled: March 17, 2016Date of Patent: September 11, 2018Assignee: The United States of America as Represented by The Secretary of The ArmyInventors: Munir H. Nayfeh, Charles P. Marsh, Ghassan K. Al-Chaar
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Patent number: 9862885Abstract: A hybrid nanophosphor includes red silicon nanoparticles in a homogenous mixture blue and green phosphors. A preferred hybrid nanophosphor uses ZnS: Ag, and ZnS: Cu, Au, Al for blue and green conversion, respectively, and mono dispersed 3 nm Si nano particles as a red phosphor. Wide emission profiles are provided by all components, and predetermined color characteristics in terms of CCT and CRI can be achieved simultaneously for excitation. A preferred lighting device includes a nanophosphor thin film of the invention on a UV or near UV-LED.Type: GrantFiled: September 29, 2014Date of Patent: January 9, 2018Inventor: Munir H. Nayfeh
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Publication number: 20170268943Abstract: A nanoparticle sensor apparatus includes a silicon-based nanoparticle having a centrosymmetric crystalline structure. A lanthanide atom embedded within the silicon-based nanoparticle provides light emission when the sensor apparatus undergoes pressure loading. This sensor apparatus may be encapsulated in a polymer matrix to form a nanoparticle sensor matrix apparatus which may be located on or in a structure. To measure the pressure on such a structure, a UV light source illuminates the sensor apparatus. An optical emission detector detects the intensity of light emitted from the sensor in response, while a processor correlates that intensity to the pressure loading.Type: ApplicationFiled: March 17, 2016Publication date: September 21, 2017Inventors: Munir H. Nayfeh, Charles P. Marsh, Ghassan K. Al-Chaar
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Patent number: 9475985Abstract: A composite of the invention is a homogenous mixture of room temperature vulcanizing material or polymer and luminescent silicon nanoparticles. The composite can be formed into a film and can serve as a paint, adhesive, or coating, depending upon the material or polymer used. A preferred polymer is polyurethane. A method for forming a silicon nanoparticle and room temperature vulcanizing (RTV) material or polymer composite of the invention includes steps of providing silicon nanoparticles that were prepared in a solvent. The solvent is mixed with RTV or polymer precursors. The RTV or polymer components are permitted to cure. A preferred solvent is isopropynol alcohol.Type: GrantFiled: September 30, 2008Date of Patent: October 25, 2016Assignee: NanoSi Advanced Technologies, Inc.Inventors: Munir H. Nayfeh, Ebtesam Mohammed Salah Al-Olayan
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Patent number: 9263600Abstract: A photovoltaic device for converting light into electrical power includes a film (16, 26, 36) of silicon nanoparticles. The silicon nanoparticle film, which can be a multilayer film, has a photoluminescence response and couples light and or electricity into semiconductor layers. A particular example photovoltaic device of the invention include a solar cell that accepts and converts light of a predetermined wavelength range into electrical power. A film containing luminescent silicon nanoparticles is optically coupled to the solar cell. The film has a predetermined thickness. The film responds to incident radiation and produces light or electron response in the predetermined wavelength range that is optically coupled into the solar cell. In preferred embodiments, the film is additionally or alternatively electrically coupled to the solar cell, which produces charge response that is electrically coupled into the solar cell.Type: GrantFiled: November 9, 2006Date of Patent: February 16, 2016Assignee: The Board of Trustees of the University of IllinoisInventors: Munir H. Nayfeh, Matthew Stupka, Turki Al Saud, Mohammad Alsalhi
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Patent number: 9096432Abstract: Embodiments of the invention provide, among other things, a method of preparing nanoparticles including silicon nanoparticles. A mixture is prepared that includes auric acid (HAuCl4) and HF. A silicon substrate is exposed to the prepared mixture to treat the silicon substrate. The treated silicon substrate is immersed in an etchant mixture, wherein nanoparticles are formed on a surface of the substrate. The nanoparticles are recovered from the substrate.Type: GrantFiled: February 1, 2012Date of Patent: August 4, 2015Assignee: NanoSi Advanced Technologies, Inc.Inventor: Munir H. Nayfeh
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Publication number: 20150159819Abstract: A hybrid nanophosphor includes red silicon nanoparticles in a homogenous mixture blue and green phosphors. A preferred hybrid nanophosphor uses ZnS:Ag, and ZnS:Cu,Au,Al for blue and green conversion, respectively, and mono dispersed 3 nm Si nano particles as a red phosphor. Wide emission profiles are provided by all components, and predetermined color characteristics in terms of CCT and CRI can be achieved simultaneously for excitation. A preferred lighting device includes a nanophosphor thin film of the invention on a UV or near UV-LED.Type: ApplicationFiled: September 29, 2014Publication date: June 11, 2015Inventor: Munir H. Nayfeh
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Patent number: 9053849Abstract: A magnetic nanosilicon material comprising silicon nanoparticles impregnated with magnetic atoms. This magnetic nanosilicon material has both luminescent and magnetic properties. In certain embodiments of the invention, magnetic nanosilicon material is encapsulated in a polymer or silica sphere to provide a supermolecule. Supermolecules can be used in applications such as but not limited to detection and imaging.Type: GrantFiled: September 20, 2011Date of Patent: June 9, 2015Assignees: NanoSi Advanced Technologies, Inc., King Fahd University of Petroleum and Minerals (KFUPM)Inventors: Munir H. Nayfeh, Zain H. Yamani
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Publication number: 20130217289Abstract: A one-dimensional super capacitor thread has thin conductive wire electrode. An active layer of silicon nanoparticles and polyaniline surrounds the electrode. An electrolyte layer surrounds the active layer. The electrolyte layer can be a layer of polyvinyl alcohol (PVA). A super capacitor can be formed with two or more of the threads, such as in a twisted pair configuration. The dimensions of the super capacitor can approximate standard threads used in clothing, for example.Type: ApplicationFiled: September 12, 2012Publication date: August 22, 2013Applicant: NanoSi Advanced Technologies, Inc.Inventors: Munir H. Nayfeh, Sui-Tung Yau, Ammar M. Nayfeh
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Publication number: 20120195977Abstract: Embodiments of the invention provide, among other things, a method of preparing nanoparticles including silicon nanoparticles. A mixture is prepared that includes auric acid (HAuCl4) and HF. A silicon substrate is exposed to the prepared mixture to treat the silicon substrate. The treated silicon substrate is immersed in an etchant mixture, wherein nanoparticles are formed on a surface of the substrate. The nanoparticles are recovered from the substrate.Type: ApplicationFiled: February 1, 2012Publication date: August 2, 2012Applicant: NanoSi ADVANCED TECHNOLOGIES, INC.Inventor: Munir H. Nayfeh
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Publication number: 20120077021Abstract: A magnetic nanosilicon material comprising silicon nanoparticles impregnated with magnetic atoms. This magnetic nanosilicon material has both luminescent and magnetic properties. In certain embodiments of the invention, magnetic nanosilicon material is encapsulated in a polymer or silica sphere to provide a supermolecule. Supermolecules can be used in applications such as but not limited to detection and imaging.Type: ApplicationFiled: September 20, 2011Publication date: March 29, 2012Inventors: Munir H. Nayfeh, Zain H. Yamani
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Patent number: 8076410Abstract: An embodiment of the invention is luminescent silicon nanoparticle polymer composite that can serve as a wavelength converter or a UV absorber. The composite includes a polymer or an organosilicon compound; and within the polymer or organosilicon compound, a dispersion of luminescent silicon nanoparticles. In a preferred composite, the silicon nanoparticles have multiple Si—H termination sites, the silicon nanoparticles being linked to a C site to produce a silicon carbide bond (Si—C). In a preferred embodiment, the polymer comprises polyurethane. A composite of the invention can perform wavelength conversion. In a wavelength converted film of the invention, the silicon nanoparticles are incorporated into the polymer or organosilicon compound in a quantity sufficient for wavelength conversion but small enough to have no or an insubstantial effect on the properties of the polymer or the organosilicon compound. A white LED of the invention includes a light emitting diode having a narrow band wavelength output.Type: GrantFiled: September 30, 2008Date of Patent: December 13, 2011Assignee: Nanosi Advanced Technologies, Inc.Inventors: Munir H. Nayfeh, Salman A. H. Alrokayan
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Patent number: 8029944Abstract: The invention provides the use of silicon particles as redox catalyst, an electrochemical device and method thereof. As electrocatalyst, the silicon particles catalyze a redox reaction such as oxidization of the redox reactant such as renewable fuels e.g. methanol, ethanol and glucose. The device such as a fuel cell comprises a redox reactant and a catalytic composition comprising silicon nanoparticles. The silicon particles catalyze the redox reaction on an electrode such as anode in the device. In preferred embodiments, the electrocatalysis is dramatically improved under low illuminance such as in darkness. The invention can be widely used in applications related to for example a fuel cell, a sensor, an electrochemical reactor, and a memory.Type: GrantFiled: May 21, 2008Date of Patent: October 4, 2011Assignee: Cleveland State UniversityInventors: Siu-Tung Yau, Munir H. Nayfeh, Gang Wang
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Patent number: 7989833Abstract: Multiple films of red-green-blue (RGB) luminescent silicon nanoparticles are integrated in a cascade configuration as a top coating in an ultraviolet/blue light emitting diode (LED) to convert it to a white LED. The configuration of RGB luminescent silicon nanoparticle films harnesses the short wavelength portion of the light emitted from the UV/blue LED while transmitting efficiently the longer wavelength portion. The configuration also reduces damaging heat and/or ultraviolet effects to both the device and to humans.Type: GrantFiled: January 15, 2009Date of Patent: August 2, 2011Assignee: Goeken Group Corp.Inventors: Carlo Scianna, Munir H. Nayfeh, Abdulrahman Al-Muhanna
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Publication number: 20100234204Abstract: Embodiments of the invention provide organosilicon silicon nanoparticle composites, where the silicon nanoparticles are highly luminescent. Preferred embodiments of the invention are Si—O solid composite networks, e.g., glass, having a homogenous distribution of luminescent hydrogen terminated silicon nanoparticles in a homogenous distribution throughout the solid. Embodiments of the invention also provide fabrication processes for organosilicon silicon nanoparticle composites. A preferred method for forming an organosilicon nanoparticle composite disperses hydrogen terminated silicon nanoparticles and an inorganic precursor of an organosilicon gel in an aprotic solvent to form a sol. A catalyst is mixed into the sol. The sol is then permitted to dry into a gel of the organosilicon nanoparticle composite.Type: ApplicationFiled: February 17, 2010Publication date: September 16, 2010Applicant: NANOSI ADVANCED TECHNOLOGIES, INC.Inventors: Abdullah Saleh Aldwayyan, Mohamad Saleh AlSalhi, Abdulrahman Mohammed Aldukhai, Mansour S. Alhoshan, Muhammad Naziruddin Khan, Ghassan K. Al-Chaar, Munir H. Nayfeh
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Publication number: 20100129300Abstract: The invention provides homogenous dispersions of luminescent silicon nanoparticles in organoslicoon compounds, fatty acids and oils. In methods of the invention, a fatty acid or oil and silicon nanoparticle homogenous dispersion is formed by mixing. The dispersion of nanoparticles in organosilicon compounds, fatty acid(s) or oil(s) can used as a delivery mechanism to homogenously incorporate the nanoparticles into a variety of cosmetic compounds and oils, such as foundation creams and other make-up products, sun tan lotions, sun tan oils, etc. Compounds of the invention with homogenous nanoparticle dispersions display homogeneous UV/blue absorption as well as down conversion to visible luminescence. The compounds can be tailored to exhibit white luminescence under UV illumination. Preferred skin care compounds provide a pleasing cosmetic effect in response to light. Preferred skin care compounds also provide uv protection.Type: ApplicationFiled: November 17, 2009Publication date: May 27, 2010Applicant: NANOSI ADVANCED TECHNOLOGIES, INC.Inventors: Munir H. Nayfeh, Hanan I. Malkawi, Ebtesam Mohammed Salanh Al-Olayan, Khalid Mohammad AlGhamdi
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Publication number: 20100044344Abstract: A silicon nanoparticle formation method that can rapidly produce substantial quantities of silicon nanoparticles, which are readily recoverable for subsequent uses. Methods of the invention treat silicon powder in hexachloroplatinic acid.Type: ApplicationFiled: July 25, 2006Publication date: February 25, 2010Inventors: Munir H. Nayfeh, Jon Host, David Nielsen
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Publication number: 20100019261Abstract: Multiple films of red-green-blue (RGB) luminescent silicon nanoparticles are integrated in a cascade configuration as a top coating in an ultraviolet/blue light emitting diode (LED) to convert it to a white LED. The configuration of RGB luminescent silicon nanoparticle films harnesses the short wavelength portion of the light emitted from the UV/blue LED while transmitting efficiently the longer wavelength portion. The configuration also reduces damaging heat and/or ultraviolet effects to both the device and to humans.Type: ApplicationFiled: January 15, 2009Publication date: January 28, 2010Applicant: GOEKEN GROUP CORP.Inventors: Carlo Scianna, Munir H. Nayfeh, Abdulrahman Al-Muhanna
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Publication number: 20090308441Abstract: A photovoltaic device for converting light into electrical power includes a film (16, 26, 36) of silicon nanoparticles. The silicon nanoparticle film, which can be a multilayer film, has a photoluminescence response and couples light and or electricity into semiconductor layers. A particular example photovoltaic device of the invention include a solar cell that accepts and converts light of a predetermined wavelength range into electrical power. A film containing luminescent silicon nanoparticles is optically coupled to the solar cell. The film has a predetermined thickness. The film responds to incident radiation and produces light or electron response in the predetermined wavelength range that is optically coupled into the solar cell. In preferred embodiments, the film is additionally or alternatively electrically coupled to the solar cell, which produces charge response that is electrically coupled into the solar cell.Type: ApplicationFiled: November 9, 2006Publication date: December 17, 2009Inventors: Munir H. Nayfeh, Matthew Stupka, Turki Al Saud, Mohammad Alsalhi