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Title: Separation of carbon nanotubes into chirally enriched fractions

Abstract

A mixture of single-walled carbon nanotubes ("SWNTs") is separated into fractions of enriched chirality by preparing an aqueous suspension of a mixture of SWNTs and a surfactant, injecting a portion of the suspension on a column of separation medium having a density gradient, and centrifuging the column. In some embodiments, salt is added prior to centrifugation. In other embodiments, the centrifugation is performed at a temperature below room temperature. Fractions separate as colored bands in the column. The diameter of the separated SWNTs decreases with increasing density along the gradient of the column. The colored bands can be withdrawn separately from the column.

Inventors:
 [1];  [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1041012
Patent Number(s):
8153014
Application Number:
12/150,813
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
B - PERFORMING OPERATIONS B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS B03B - SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Doorn, Stephen K, and Niyogi, Sandip. Separation of carbon nanotubes into chirally enriched fractions. United States: N. p., 2012. Web.
Doorn, Stephen K, & Niyogi, Sandip. Separation of carbon nanotubes into chirally enriched fractions. United States.
Doorn, Stephen K, and Niyogi, Sandip. Tue . "Separation of carbon nanotubes into chirally enriched fractions". United States. https://www.osti.gov/servlets/purl/1041012.
@article{osti_1041012,
title = {Separation of carbon nanotubes into chirally enriched fractions},
author = {Doorn, Stephen K and Niyogi, Sandip},
abstractNote = {A mixture of single-walled carbon nanotubes ("SWNTs") is separated into fractions of enriched chirality by preparing an aqueous suspension of a mixture of SWNTs and a surfactant, injecting a portion of the suspension on a column of separation medium having a density gradient, and centrifuging the column. In some embodiments, salt is added prior to centrifugation. In other embodiments, the centrifugation is performed at a temperature below room temperature. Fractions separate as colored bands in the column. The diameter of the separated SWNTs decreases with increasing density along the gradient of the column. The colored bands can be withdrawn separately from the column.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {4}
}

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Works referenced in this record:

Enrichment of Single-Walled Carbon Nanotubes by Diameter in Density Gradients
journal, April 2005


Selective Aggregation of Single-Walled Carbon Nanotubes via Salt Addition
journal, February 2007


Assessment of Chemically Separated Carbon Nanotubes for Nanoelectronics
journal, February 2008


Sorting carbon nanotubes by electronic structure using density differentiation
journal, October 2006


Optical and Conductive Characteristics of Metallic Single-Wall Carbon Nanotubes with Three Basic Colors; Cyan, Magenta, and Yellow
journal, February 2008


DNA-assisted dispersion and separation of carbon nanotubes
journal, April 2003