Iii-p Based Compounds (e.g., Alxgayin2p, Etc.) Patents (Class 977/818)
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Patent number: 8545736Abstract: Disclosed herein is a method for the preparation of metal phosphide nanocrystals using a phosphite compound as a phosphorous precursor. More specifically, disclosed herein is a method for preparing metal phosphide nanocrystals by reacting a metal precursor with a phosphite compound in a solvent. A method is also provided for passivating a metal phosphide layer on the surface of a nanocrystal core by reacting a metal precursor with a phosphite compound in a solvent. The metal phosphide nanocrystals have uniform particle sizes and various shapes.Type: GrantFiled: July 24, 2012Date of Patent: October 1, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Shin Ae Jun, Eun Joo Jang, Jung Eun Lim
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Patent number: 8465716Abstract: The subject of the invention is a method of synthesizing a compound MxPy where M is an element belonging to one of columns II to XV of the Periodic Table of the Elements or to the family of lanthanides or to the family of actinides, characterized in that it includes the reaction of x moles of compound comprising the element M in its oxidation state 0 with y/4n moles of compound (P4)n. The method of the invention may be carried out at a temperature much lower than those necessary in the methods of the prior art. It also allows low-temperature formation of nanoparticles and stoichiometric reaction control. The applications of this method are numerous: magnetic ferro-magnets for MnP and FeP; hydrodesulfurization catalysts for Ni2P; luminescent nanoparticles for biological applications; microelectronics and optoelectronics for InP; and electronics for GaP. The latter two phosphides are also used in the photovoltaic energy field.Type: GrantFiled: June 2, 2008Date of Patent: June 18, 2013Assignee: Ecole PolytechniqueInventors: Pascal Le Floch, Nicolas Mezailles, Xavier Le Goff, Benoit Dubertret
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Publication number: 20130069018Abstract: A method for preparing semiconductor nanocrystals comprises reacting cation precursors and anion precursors in a reaction mixture including one or more acids, one or more phenol compounds, and a solvent to produce semiconductor nanocrystals having a predetermined composition. A method for forming a coating on at least a portion of a population of semiconductor nanocrystals is also disclosed. The method comprises forming a first mixture including a population of semiconductor nanocrystals, one or more amine compounds, and a first solvent; adding cation precursors and anion precursors to the first mixture at a temperature sufficient for growing a semiconductor material on at least a portion of an outer surface of at least a portion of the population of semiconductor nanocrystals; and initiating addition of one or more acids to the first mixture after addition of the cation and anion precursors is initiated. Semiconductor nanocrystals and populations thereof are also disclosed.Type: ApplicationFiled: August 10, 2012Publication date: March 21, 2013Inventors: ZHENGGUO ZHU, Jonathan S. Steckel, Craig Breen, Justin W. Kamplain, Inia Song, Chunming Wang
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Patent number: 8357954Abstract: A method for forming a nanowhisker of, e.g., a III-V semiconductor material on a silicon substrate, comprises: preparing a surface of the silicon substrate with measures including passivating the substrate surface by HF etching, so that the substrate surface is essentially atomically flat. Catalytic particles on the substrate surface are deposited from an aerosol; the substrate is annealed; and gases for a MOVPE process are introduced into the atmosphere surrounding the substrate, so that nanowhiskers are grown by the VLS mechanism. In the grown nanowhisker, the crystal directions of the substrate are transferred to the epitaxial crystal planes at the base of the nanowhisker and adjacent the substrate surface.Type: GrantFiled: May 16, 2011Date of Patent: January 22, 2013Assignee: QuNano ABInventors: Lars Ivar Samuelson, Thomas M. I. Martensson
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Publication number: 20120267585Abstract: Compositions comprising nanosized objects (i.e., nanoparticles) in which at least one observable marker, such as a radioisotope or fluorophore, is incorporated within the nanosized object. The nanosized objects include, for example, metal or semi-metal oxide (e.g., silica), quantum dot, noble metal, magnetic metal oxide, organic polymer, metal salt, and core-shell nanoparticles, wherein the label is incorporated within the nanoparticle or selectively in a metal oxide shell of a core-shell nanoparticle. Methods of preparing the volume-labeled nanoparticles are also described.Type: ApplicationFiled: June 6, 2012Publication date: October 25, 2012Applicant: UT-BATTELLE, LLCInventors: Wei Wang, Baohua Gu, Scott T. Retterer, Mitchel J. Doktycz
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Patent number: 8252205Abstract: Disclosed herein is a method for the preparation of metal phosphide nanocrystals using a phosphite compound as a phosphorous precursor. More specifically, disclosed herein is a method for preparing metal phosphide nanocrystals by reacting a metal precursor with a phosphite compound in a solvent. A method is also provided for passivating a metal phosphide layer on the surface of a nanocrystal core by reacting a metal precursor with a phosphite compound in a solvent. The metal phosphide nanocrystals have uniform particle sizes and various shapes.Type: GrantFiled: January 8, 2008Date of Patent: August 28, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Shin Ae Jun, Eun Joo Jang, Jung Eun Lim
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Patent number: 8221651Abstract: Nanoparticles having a core/shell structure consisting of a core comprising a Group III element and a Group V element at a molar ratio of the Group III element to the Group V element in the range of 1.25 to 3.0, and a shell comprising a Group II element and a Group VI element and having a thickness of 0.2 nm to 4 nm, the nanoparticles having a photoluminescence efficiency of 10% or more and a diameter of 2.5 to 10 nm; a method of producing the water-dispersible nanoparticles and a method of producing a glass matrix having the nanoparticles dispersed therein.Type: GrantFiled: April 21, 2009Date of Patent: July 17, 2012Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Norio Murase, Chunliang Li, Masanori Ando
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Patent number: 8062967Abstract: Methods for producing nanostructures, particularly Group III-V semiconductor nanostructures, are provided. The methods include use of novel Group III and/or Group V precursors, novel surfactants, oxide acceptors, high temperature, and/or stable co-products. Related compositions are also described. Methods and compositions for producing Group III inorganic compounds that can be used as precursors for nanostructure synthesis are provided. Methods for increasing the yield of nanostructures from a synthesis reaction by removal of a vaporous by-product are also described.Type: GrantFiled: June 1, 2009Date of Patent: November 22, 2011Assignee: Nanosys, Inc.Inventors: Erik C. Scher, Mihai A. Buretea, William P. Freeman, Joel Gamoras, Baixin Qian, Jeffery A. Whiteford
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Publication number: 20110136139Abstract: Semiconductor nanoparticle complexes comprising semiconductor nanoparticles in association with cationic polymers are described. Also described are methods for enhancing the transport of semiconductor nanoparticles across biological membranes to provide encoded cells. The methods are particularly useful in multiplex settings where a plurality of encoded cells are to be assayed. Kits comprising reagents for performing such methods are also provided.Type: ApplicationFiled: October 15, 2010Publication date: June 9, 2011Applicant: LIFE TECHNOLOGIES CORPORATIONInventors: MARCEL P. BRUCHEZ, R. HUGH DANIELS, JENNIFER DIAS, LARRY C. MATTHEAKIS, HONGJIAN LIU, AQUANETTE M. BURT, BERNDT CHRISTOFFER LAGERHOLM, DANITH H. LY
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Patent number: 7838368Abstract: A transistor device is formed of a continuous linear nanostructure having a source region, a drain region and a channel region between the source and drain regions. The source (20) and drain (26) regions are formed of nanowire ania the channel region (24) is in the form of a nanotube. An insulated gate (32) is provided adjacent to the channel region (24) for controlling conduction i ni the channel region between the source and drain regions.Type: GrantFiled: July 12, 2005Date of Patent: November 23, 2010Assignee: NXP B.V.Inventors: Radu Surdeanu, Prabhat Agarwal, Abraham Rudolf Balkenende, Erik P. A. M. Bakkers
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Patent number: 7833506Abstract: The invention relates to a process for producing morphologically uniform and virtually monodisperse metal-containing nanoparticles, characterized in that the separation both in time and space of the nucleation and growth processes is achieved by regulation of the temperature and volume flows, with the reaction and particle formation preferably being initiated and carried out in a suitable microstructured modular reactor system. Modularization of the microreaction plant (micro heat exchanger, residence reactor, micromixer, etc.) allows optimal setting of the respective chemical and process-engineering process parameters and thus the preparation of virtually monodisperse and morphologically uniform nanoparticles.Type: GrantFiled: November 8, 2007Date of Patent: November 16, 2010Assignee: Bayer Technology Services GmbHInventors: Frank Rauscher, Verena Haverkamp, Björn Henninger, Leslaw Mleczko
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Patent number: 7648689Abstract: The invention is to provide a process for industrially advantageously producing InP fine particles having a nano-meter size efficiently in a short period of time and an InP fine particle dispersion, and there are provided a process for the production of InP fine particles by reacting an In raw material containing two or more In compounds with a P raw material containing at least one P compound in a solvent wherein the process uses, as said two or more In compounds, at least one first In compound having a group that reacts with a functional group of P compound having a P atom adjacent to an In atom to be eliminated with the functional group in the formation of an In-P bond and at least one second In compound having a lower electron density of In atom in the compound than said first In compound and Lewis base solvent as said solvent, and InP fine particles obtained by the process.Type: GrantFiled: March 10, 2006Date of Patent: January 19, 2010Assignee: Hoya CorporationInventor: Shuzo Tokumitsu
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Publication number: 20090220756Abstract: Semiconductor nano-particles, due to their specific physical properties, can be used as reversible photo-bleachable materials for a wide spectrum, from far infrared to deep UV. Applications include, reversible contrast enhancement layer (R-CEL) in optical lithography, lithography mask inspection and writing and optical storage technologies.Type: ApplicationFiled: March 16, 2009Publication date: September 3, 2009Applicant: PIXELLIGENT TECHNOLOGIES LLCInventors: Zhiyun Chen, Erin F. Fleet, Serpil Gonen, Gregory D. Cooper
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Patent number: 7515333Abstract: Nanomaterials for use in optoelectronic applications, and particularly nanocomposite optical amplifiers. nanocomposite optical amplifiers (NOAs), e.g., provided on integrated optical chips, for cost-effective broadband amplification across the entire clear-window of optical fiber. It is expected that such systems could provide a 15× increase in bandwidth over existing technology, while remaining compatible with all future advances in bit-rate and channel spacing.Type: GrantFiled: June 12, 2003Date of Patent: April 7, 2009Assignee: Nanosy's, Inc.Inventor: Stephen Empedocles
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Publication number: 20090027763Abstract: A microelectromechanical systems (MEMS) device and related methods are described. The MEMS device comprises a first member having a first surface and a second member having a second surface, the first and second surfaces being separated by a gap that is closable by a MEMS actuation force applied to at least one of the first and second members. A standoff layer is disposed on the first surface of the first member, the standoff layer providing standoff between the first and second surfaces upon a closing of the gap by the MEMS actuation force. The standoff layer comprises a plurality of nanowires that are anchored to the first surface of the first member and that extend outward therefrom.Type: ApplicationFiled: July 24, 2007Publication date: January 29, 2009Inventors: Wenhua Zhang, Wei Wu, Shih-Yuan Wang
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Patent number: 7399429Abstract: A semiconductor nanocrystal complex that is stable and has high luminescent quantum yield. The semiconductor nanocrystal complex has a semiconductor nanocrystal core of a III-V semiconductor nanocrystal material. A method of making a semiconductor nanocrystal complex is also provided. The method includes synthesizing a semiconductor nanocrystal core of a III-V semiconductor nanocrystal material, and forming a metal layer on the semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core.Type: GrantFiled: May 10, 2005Date of Patent: July 15, 2008Assignee: Evident Technologies, Inc.Inventors: Wei Liu, Adam Peng, Daniel Landry
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Patent number: 7326365Abstract: Temperature-sensing compositions can include an inorganic material, such as a semiconductor nanocrystal. The nanocrystal can be a dependable and accurate indicator of temperature. The intensity of emission of the nanocrystal varies with temperature and can be highly sensitive to surface temperature. The nanocrystals can be processed with a binder to form a matrix, which can be varied by altering the chemical nature of the surface of the nanocrystal. A nanocrystal with a compatibilizing outer layer can be incorporated into a coating formulation and retain its temperature sensitive emissive properties.Type: GrantFiled: May 16, 2005Date of Patent: February 5, 2008Assignee: Massachusetts Institute of TechnologyInventors: Moungi G. Bawendi, Vikram C. Sundar
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Patent number: 7138098Abstract: A method of manufacturing a nanocrystallite from a M-containing salt forms a nanocrystallite. The nanocrystallite can be a member of a population of nanocrystallites having a narrow size distribution and can include one or more semiconductor materials. Semiconducting nanocrystallites can photoluminesce and can have high emission quantum efficiencies.Type: GrantFiled: October 8, 2004Date of Patent: November 21, 2006Assignee: Massachusetts Institute of TechnologyInventors: Moungi Bawendi, Nathan E. Stott
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Patent number: 7129154Abstract: A nanowire of a semiconductor material and having a uniform cross-sectional area along its length is grown using a chemical vapor deposition process. In the method, a substrate is provided, a catalyst nanoparticle is deposited on the substrate, a gaseous precursor mixture comprising a constituent element of the semiconductor material is passed over the substrate, and adatoms of the constituent element are removed from a lateral surface of the nanowire during the passing of the precursor mixture. The removing comprises passing over the substrate a gaseous etchant that forms a volatile compound with the adatoms, the gaseous etchant comprising a halogenated hydrocarbon. Removing the adatoms of the constituent element before such adatoms are incorporated into the nanowire prevents such adatoms from accumulating on the lateral surface of the nanowire and allows the nanowire to grow with a uniform cross-sectional area along its length.Type: GrantFiled: May 28, 2004Date of Patent: October 31, 2006Assignee: Agilent Technologies, IncInventor: Sung Soo Yi