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Inventor: Otto Z. Zhou


Address: Chapel Hill, NC
No. of patents: 27
Last patent issue date: 08/23/2011

NumberTitleIssue Date
8002958Deposition 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...
08/23/2011
7887689Method and apparatus for attaching nanostructure-containing material onto a sharp tip of an object and related articles
A method for attaching nanostructure-containing material onto a sharp tip of an object includes forming a suspension of pre-formed nanostructure-containing material in a liquid medium. An electrode is immersed in the suspension. The sharp tip of the object is arrang...
02/15/2011
7826595Micro-focus field emission x-ray sources and related methods
Micro-focus field emission x-ray sources and related methods are provided. A micro-focus field emission x-ray source can include a field emission cathode including a film with a layer of electron field emitting materials patterned on a conducting surface. Further, t...
11/02/2010
7751528Stationary x-ray digital breast tomosynthesis systems and related methods
Stationary x-ray digital breast tomosynthesis systems and related methods are disclosed. According to one aspect, the subject matter described herein can include an x-ray tomosynthesis system having a plurality of stationary field emission x-ray sources configured t...
07/06/2010
7618300Method 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
7486772Systems 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
7455757Deposition 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
7359484Devices 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
7252749Deposition 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
7245692X-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
7227924Computed 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
7220971Multi-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
7147894Method 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
7129513Field 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
7082182Computed 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
7014743Methods 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
6980627Devices 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
6969690Methods 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
6965199Coated 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
6876724Large-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
6850595X-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
6787122Method 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
6553096X-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
6514395Nanostructure-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
6422450Nanotube-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
6334939Nanostructure-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
6280697Nanotube-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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