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Title: Purification of carbon nanotubes via selective heating

Abstract

The present invention provides methods for purifying a layer of carbon nanotubes comprising providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein the precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes; selectively heating the first carbon nanotubes; and separating the first carbon nanotubes from the second carbon nanotubes, thereby generating a purified layer of carbon nanotubes. Devices benefiting from enhanced electrical properties enabled by the purified layer of carbon nanotubes are also described.

Inventors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
The Board of Trustees of the University of Illinois, Ubana, IL (United States); Northwestern Univ., Evanston, IL (United States); University of Miami, Miami, FL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1409827
Patent Number(s):
9,825,229
Application Number:
14/772,312
Assignee:
The Board of Trustees of the University of Illinois (Ubana, IL); Northwestern University (Evanston, IL); University of Miami (Miami, FL) CHO
DOE Contract Number:
FG02-91ER45439
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Apr 03
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Rogers, John A., Wilson, William L., Jin, Sung Hun, Dunham, Simon N., Xie, Xu, Islam, Ahmad, Du, Frank, Huang, Yonggang, and Song, Jizhou. Purification of carbon nanotubes via selective heating. United States: N. p., 2017. Web.
Rogers, John A., Wilson, William L., Jin, Sung Hun, Dunham, Simon N., Xie, Xu, Islam, Ahmad, Du, Frank, Huang, Yonggang, & Song, Jizhou. Purification of carbon nanotubes via selective heating. United States.
Rogers, John A., Wilson, William L., Jin, Sung Hun, Dunham, Simon N., Xie, Xu, Islam, Ahmad, Du, Frank, Huang, Yonggang, and Song, Jizhou. 2017. "Purification of carbon nanotubes via selective heating". United States. doi:. https://www.osti.gov/servlets/purl/1409827.
@article{osti_1409827,
title = {Purification of carbon nanotubes via selective heating},
author = {Rogers, John A. and Wilson, William L. and Jin, Sung Hun and Dunham, Simon N. and Xie, Xu and Islam, Ahmad and Du, Frank and Huang, Yonggang and Song, Jizhou},
abstractNote = {The present invention provides methods for purifying a layer of carbon nanotubes comprising providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein the precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes; selectively heating the first carbon nanotubes; and separating the first carbon nanotubes from the second carbon nanotubes, thereby generating a purified layer of carbon nanotubes. Devices benefiting from enhanced electrical properties enabled by the purified layer of carbon nanotubes are also described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month =
}

Patent:

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  • In this invention, processes which can be used to achieve stable doped carbon nanotubes are disclosed. Preferred CNT structures and morphologies for achieving maximum doping effects are also described. Dopant formulations and methods for achieving doping of a broad distribution of tube types are also described.
  • A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal ion that is adapted to form p-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by p-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.
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  • A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal cation that is adapted to form .pi.-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by .pi.-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.