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Class 977/845 - Purification or separation of fullerenes or nanotubes


Subclass of Class 977 - Nanotechnology
Definition: Subject matter wherein the process or apparatus is adapted
No. of patents: 20
Last issue date: 06/05/2012


NumberTitleIssue Date
8193430Methods for separating carbon nanotubes
Disclosed herein too is a method that includes dispersing nanotubes in media that comprises flavin moieties substituted with solubilizing side chains, and/or non-flavin containing molecular species; self-assembling the flavin moieties and other non-flavin containing...
06/05/2012
7488876Method for selectively separating semiconductive carbon nanotubes
Semiconducting type carbon nanotubes are efficiently separated from a mixture of semiconducting and metallic carbon nanotubes in a simple manner, by way of treating the carbon nanotube mixture with an organic solution containing nitronium ions, filtering the resulti...
02/10/2009
7488875Process for purifying carbon nanotubes made on refractory oxide supports
A carbon nanotube material that comprises carbon nanotubes, a magnesia support and a catalyst metal can be purified by contacting it with a mixture comprising carbon dioxide and water. At least some of the magnesia support is reacted to form water-soluble compounds....
02/10/2009
7435403Separation and purification of fullerenes
A method of processing fullerenes includes generating a gas stream having suspended soot particles and condensable gases, wherein the condensable gases comprise fullerenes, and separating at least a portion of the condensable gases from the suspended soot particles ...
10/14/2008
7374685Process for separating metallic from semiconducting single-walled carbon nanotubes
A method for separating semiconducting single-walled carbon nanotubes from metallic single-walled carbon nanotubes is disclosed. The method utilizes separation agents that preferentially associate with semiconducting nanotubes due to the electrical nature of the nan...
05/20/2008
7357906Method for fractionating single-wall carbon nanotubes
The invention relates generally to dispersing and fractionating single-wall carbon nanotubes, which can be derivatized to facilitate fractionation, for example, by adding solubilizing moieties to the nanotubes. ...
04/15/2008
7354563Method for purification of as-produced fullerene nanotubes
This invention relates generally to a fullerene nanotube purification process and more particularly to a purification process that comprises heating the fullerene nanotube-containing felt under oxidizing conditions to remove the amorphous carbon deposits and other c...
04/08/2008
7347981Directed flow method and system for bulk separation of single-walled tubular fullerenes based on helicity
A method for bulk separation of single-walled tubular fullerenes (100) based on helicity is provided wherein a solution or suspension of the single-walled tubular fullerenes (100) is flowed onto a crystalline or highly oriented substrate (30). T...
03/25/2008
7259344Application of static light to a fluid of CNTs for purposes of sorting the CNTs
A method is described that comprises sorting carbon nanotubes (CNTs) within a fluidic flow for a targeted subset of the CNTs. The sorting comprises attracting at least a portion of the CNTs within the fluidic flow in a direction of increasing intensity of an electri...
08/21/2007
7250569Method for dissolving nanostructural materials
High solubility of pristine single and multi-walled carbon nanotubes using electron donors as solubilizers has been observed. The resulting carbon nanotube solution can be readily diluted with other organic solvents, such as acetone, toluene and methanol. SEM after ...
07/31/2007
7208132Purification of endohedral and other fullerenes by chemical methods
The invention provides a method of separating a first and a second set of fullerenes in a fullerene mixture. In the method of the invention, a stable fullerene cation is formed of one of the first or the second set of fullerenes. The fullerene cation is then separat...
04/24/2007
7166266Isolation and purification of single walled carbon nanotube structures
Disclosed are methods for isolating and purifying single wall carbon nanotubes from contaminant matrix material, methods for forming arrays of substantially aligned nanotubes, and products and apparatus comprising a plurality of nanotube structures. ...
01/23/2007
7135160Spheroidal aggregates comprising single-wall carbon nanotubes and method for making the same
A method for separating single-wall carbon nanotubes from an aqueous slurry comprises adding a water-immiscible organic solvent to an aqueous slurry comprising single-wall carbon nanotubes, isolating at least some of the single-wall carbon nanotubes in the solvent, ...
11/14/2006
7131537Separation of single wall carbon nanotubes
A method has been developed for the post-synthesis separation of nanotubes by size and/or type. Solubilized, functionalized nanotubes are passed over a GPC column such that length-separated fractions are collected. These length-separated fractions can then further b...
11/07/2006
7119028Surface imprinted films with carbon nanotubes
A film surface imprinted with nanometer-sized particles to produce micro- and/or nano-structured electron and hole collecting interfaces, including: at least one substrate; at least one photoabsorbing conjugated polymer (including polybutylthiophene (pbT)) applied o...
10/10/2006
6692717Catalytic growth of single-wall carbon nanotubes from metal particles
Single-walled carbon nanotubes have been synthesized by the catalytic decomposition of both carbon monoxide and ethylene over a supported metal catalyst known to produce larger multi-walled nanotubes. Under certain conditions, there is no termination of n...
02/17/2004
6680016Method of forming conductive polymeric nanocomposite materials
A method of reinforcing a polymeric material with carbon nanofibers is provided in which carbon nanofibers are combined with a polymer and a solvent for the polymer to form a substantially homogeneous mixture, followed by removal of the solvent by evapora...
01/20/2004
6669918Method for bulk separation of single-walled tubular fullerenes based on chirality
A method for bulk separation of single-walled tubular fullerenes (100) based on chirality is provided wherein a first step is the formation of a template (40) on a crystalline substrate (30). The template (40) has a plurality of openings (32) which are or...
12/30/2003
6667572Image display apparatus using nanotubes and method of displaying an image using nanotubes
An image display apparatus includes a nanotube assembly having a plurality of nanotubes arranged in an array. An optical excitation device is provided adjacent to the nanotube assembly. The optical excitation device includes a diffraction grating and a pi...
12/23/2003
6616734Dynamic filtration method and apparatus for separating nano powders
A method and apparatus for separating nanometer-sized particles of a powder. The method includes (a) feeding the powder particles into a pressurized gas stream which carries the particles into a first stage filter device of a multiple-stage separator syst...
09/09/2003
 
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