Parra-Vasquez
A. Nicholas Parra-Vasquez, Bordeaux FR
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20110318248 | Methods for Solubilizing and Separating Large Fullerenes - We have discovered that size dependent solubility of large fullerenes in strong acids is dependent on acid strength. This provides a scalable method for separating large fullerenes by size. According to some embodiments, a method for processing a fullerene starting material comprises large fullerenes comprises mixing the starting material with a first concentrated sulfuric acid solution so as to obtain a first dispersion comprising a first portion of the large fullerenes solubilized in the first concentrated sulfuric acid solution. | 12-29-2011 |
20120063988 | Dissolution Of Graphite, Graphite And Graphene Nanoribbons In Superacid Solutions And Manipulation Thereof - Methods for dissolving carbon materials such as, for example, graphite, graphite oxide, oxidized graphene nanoribbons and reduced graphene nanoribbons in a solvent containing at least one superacid are described herein. Both isotropic and liquid crystalline solutions can be produced, depending on the concentration of the carbon material The superacid solutions can be formed into articles such as, for example, fibers and films, mixed with other materials such as, for example, polymers, or used for functionalization of the carbon material. The superacid results in exfoliation of the carbon material to produce individual particles of the carbon material. In some embodiments, graphite or graphite oxide is dissolved in a solvent containing at least one superacid to form graphene or graphene oxide, which can be subsequently isolated. In some embodiments, liquid crystalline solutions of oxidized graphene nanoribbons in water are also described. | 03-15-2012 |
A. Nicholas G. Parra-Vasquez, Oxnard, CA US
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20100283008 | Carbon Nanotube Compositions and Methods for Production Thereof - Compositions comprising at least one type of carbon nanotube, at least one surfactant, and at least one polymer are disclosed. The compositions provide stable fluorescence over a wide range of pH in various embodiments. In some embodiments, the compositions are biocompatible. Methods for preparing the compositions from at least one pre-formed polymer are disclosed. Methods for preparing the compositions from at least one monomer are disclosed. Heating methods utilizing the compositions are disclosed. | 11-11-2010 |
A. Nicholas G. Parra-Vasquez, Houston, TX US
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20110110843 | NEAT CARBON NANOTUBE ARTICLES PROCESSED FROM SUPER ACID SOLUTIONS AND METHODS FOR PRODUCTION THEREOF - Articles comprising neat, aligned carbon nanotubes and methods for production thereof are disclosed. The articles and methods comprise extrusion of a super acid solution of carbon nanotubes followed by removal of the super acid solvent. The articles may be processed by wet-jet wet spinning, dry-jet wet spinning, and coagulant co-flow extrusion techniques. | 05-12-2011 |