Inventor: Otto Z. Zhou

Address: Chapel Hill, NC
No. of patents: 23
Last patent issue date: 11/17/2009

Number	Title	Issue Date
7618300	Method of synthesizing small-diameter carbon nanotubes with electron field emission properties Carbon nanotube material having an outer diameter less than 10 nm and a number of walls less than ten are disclosed. Also disclosed are an electron field emission device including a substrate, an optionally layer of adhesion-promoting layer, and a layer of electron ...	11/17/2009
7486772	Systems and methods for x-ray imaging and scanning of objects Systems and methods for x-ray imaging and scanning of objects are disclosed. According to one aspect, the subject matter described herein can include providing an x-ray source configured to generate a plurality of individually-controllable x-ray beams, positioning a...	02/03/2009
7455757	Deposition method for nanostructure materials A method for depositing a patterned coating of a nanostructure material onto a substrate includes: (1) forming a solution or suspension of containing the nanostructure material; (2) masking at least a portion of at least one surface of the substrate (3) immersing el...	11/25/2008
7359484	Devices and methods for producing multiple x-ray beams from multiple locations An x-ray generating device includes at least one field-emission cold cathode having a substrate and incorporating nanostructure-containing material including carbon nanotubes. The device further includes at least one anode target. Associated methods are also describ...	04/15/2008
7252749	Deposition method for nanostructure materials A method for depositing a coating of a nanostructure material onto a substrate includes: (1) forming a solution or suspension of containing the nanostructure material; (2) selectively adding “chargers” to the solution; (3) immersing electrodes in the solution, t...	08/07/2007
7245692	X-ray imaging systems and methods using temporal digital signal processing for reducing noise and for obtaining multiple images simultaneously X-ray imaging systems and methods are provided that use temporal digital signal processing for reducing noise and for obtaining multiple images simultaneously. An x-ray imaging system can include an x-ray source adapted to generate a pulsed x-ray beam having a prede...	07/17/2007
7227924	Computed tomography scanning system and method using a field emission x-ray source Computed tomography scanning systems and methods using a field emission x-ray source are disclosed. An exemplary micro-computed tomography scanner comprises a micro-focus field emission x-ray source, an x-ray detector, an object stage placed between the x-ray source...	06/05/2007
7220971	Multi-pixel electron microbeam irradiator systems and methods for selectively irradiating predetermined locations Multi-pixel electron microbeam irradiator systems and methods are provided with particular applicability for selectively irradiating predetermined cells or cell locations. A multi-pixel electron microbeam irradiator system can include a plurality of individually add...	05/22/2007
7147894	Method for assembling nano objects A method for the self assembly of a macroscopic structure with a pre-formed nano object is provided. The method includes processing a nano object to a desired aspect ratio and chemical functionality and mixing the processed nano object with a solvent to form a suspe...	12/12/2006
7129513	Field emission ion source based on nanostructure-containing material A field emission ion source has nanostructure materials on at least an emitting edge of the anode electrode. Metal is transferred from a metal reservoir to the emitting edge of the anode, where the metal is transferred to an emitting end of the nanostructure materia...	10/31/2006
7082182	Computed tomography system for imaging of human and small animal Computed tomography device comprising an x-ray source and an x-ray detecting unit. The x-ray source comprises a cathode with a plurality of individually programmable electron emitting units that each emit an electron upon an application of an electric field, an anod...	07/25/2006
7014743	Methods for assembly and sorting of nanostructure-containing materials and related articles A method for depositing a nanostructure-containing material onto an object or substrate includes one or more of the following: (1) forming a solution or suspension of nanostructure-containing material, (2) selectively adding “chargers” to the solution, (3) immer...	03/21/2006
6980627	Devices and methods for producing multiple x-ray beams from multiple locations An x-ray generating device includes at least one field-emission cold cathode having a substrate and incorporating nanostructure-containing material including carbon nanotubes. The device further includes at least one anode target. Associated methods are also describ...	12/27/2005
6969690	Methods and apparatus for patterned deposition of nanostructure-containing materials by self-assembly and related articles Methods and apparatus are described for patterned deposition of nanostructure-containing materials by self-assembly and related articles. According to an exemplary embodiment self-assembly method for depositing nanostructure-containing materials includes forming a n...	11/29/2005
6965199	Coated electrode with enhanced electron emission and ignition characteristics An improved electrode capable of smaller variances and mean breakdown voltage, increased breakdown reliability, smaller electron emission turn-on requirements, and stable electron emissions capable of high current densities include a first electrode material, an adh...	11/15/2005
6876724	Large-area individually addressable multi-beam x-ray system and method of forming same A structure to generate x-rays has a plurality of stationary and individually electrically addressable field emissive electron sources with a substrate composed of a field emissive material, such as carbon nanotubes. Electrically switching the field emissive electro...	04/05/2005
6850595	X-ray generating mechanism using electron field emission cathode An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure-containing material having an emitted electron current density of at least 4 A/cm2. High energy conversion efficiency and compact design are achiev...	02/01/2005
6787122	Method of making nanotube-based material with enhanced electron field emission properties A method of reducing electronic work function, reducing threshold field emission values, converting semiconducting behavior to metallic behavior, increasing the electron density state at the Fermi level, and increasing electron emission site density, of nanostructur...	09/07/2004
6553096	X-ray generating mechanism using electron field emission cathode An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure-containing material having an emitted electron current density of at least 4 A/cm2. High energy conversion efficiency and compact design...	04/22/2003
6514395	Nanostructure-based high energy capacity material A nanostructure based material is capable of accepting-and reacting with an alkali metal such as lithium. The material exhibits a reversible capacity ranging from at least approximately 900 mAh/g-1,500 mAh/g. The high capacity of the material makes it att...	02/04/2003
6422450	Nanotube-based high energy material and method A carbon-based material containing an allotrope of carbon, such as single-walled carbon nanotubes, is capable of accepting and intercalated alkali metal. The material exhibits a reversible capacity ranging from approximately 650 mAh/g-1,000 mAh/g. The hig...	07/23/2002
6334939	Nanostructure-based high energy capacity material A nanostructure based material is capable of accepting and reacting with an alkali metal such as lithium. The material exhibits a reversible capacity ranging from at least approximately 900 mAh/g-1,500 mAh/g. The high capacity of the material makes it att...	01/01/2002
6280697	Nanotube-based high energy material and method A carbon-based material containing an allotrope of carbon, such as single-walled carbon nanotubes, is capable of accepting and intercalated alkali metal. The material exhibits a reversible capacity ranging from approximately 650 mAh/g-1,000 mAh/g. The hig...	08/28/2001

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