The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2018
Filed:
Sep. 20, 2011
David A. Roberts, Woburn, MA (US);
Rahul Sen, Lexington, MA (US);
J. Thomas Kocab, Exeter, RI (US);
Billy Smith, Woburn, MA (US);
Feng Gu, Ellicot City, MD (US);
David A. Roberts, Woburn, MA (US);
Rahul Sen, Lexington, MA (US);
J. Thomas Kocab, Exeter, RI (US);
Billy Smith, Woburn, MA (US);
Feng Gu, Ellicot City, MD (US);
Nantero, Inc., Woburn, MA (US);
Abstract
Solutions of carbon nanotubes and methods for purifying the solutions are provided. The methods include mixing, for example, at least one complexing agents, at least one ionic species, and/or at least one buffer oxide etch (BOE) with a liquid medium containing carbon nanotubes and different types of contaminants, such as metal impurities, amorphous carbon, and/or silica particles, and performing a filtration process to the liquid medium so as to remove or reduce the contaminants in the liquid medium. As a result, carbon nanotube solutions of low contaminants are produced. In some embodiments, the solutions of this disclosure include a high concentration of carbon nanotubes and are substantially free from metal, amorphous carbon, and/or silica impurities.