A diameter-selective attack of metallic carbon nanotubes by nitronium ions

Kay Hyeok An; Jin Sung Park; Cheol Min Yang; Seung Yol Jeong; Seong Chu Lim; Chul Kang; Joo Hiuk Son; Mun Seok Jeong; Young Hee Lee

doi:10.1021/ja0428199

A diameter-selective attack of metallic carbon nanotubes by nitronium ions

Kay Hyeok An, Jin Sung Park, Cheol Min Yang, Seung Yol Jeong, Seong Chu Lim, Chul Kang, Joo Hiuk Son, Mun Seok Jeong, Young Hee Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

146 Scopus citations

Abstract

We have found a method for a diameter-selective removal of metallic single-walled carbon nanotubes (m-SWCNTs) from semiconducting (s-) ones by stirring or sonicating SWCNT powder in tetramethylene sulfone (TMS)/chloroform solution with nitronium hexafluoroantimonate (NO₂SbF₆: NHFA) and nitronium tetrafluoroborate (NO₂BF₄: NTFB). Positively charged nitronium ions (NO₂⁺) were intercalated into nanotube bundles, where the intercalation was promoted also by the counterions. Nitronium ions selectively attacked the sidewall of the m-SWCNTs due to the abundant presence of electron density at the Fermi level, thus yielding stronger binding energy as compared to the counterpart s-SWCNTs. The s-SWCNTs were left on the filter after filtration, whereas the m-SWCNTs were disintegrated and drained away as amorphous carbons. The effectiveness of removing m-SWCNTs was confirmed by the resonant Raman spectra and absorption spectra.

Original language	English
Pages (from-to)	5196-5203
Number of pages	8
Journal	Journal of the American Chemical Society
Volume	127
Issue number	14
DOIs	https://doi.org/10.1021/ja0428199
State	Published - 13 Apr 2005

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title = "A diameter-selective attack of metallic carbon nanotubes by nitronium ions",

abstract = "We have found a method for a diameter-selective removal of metallic single-walled carbon nanotubes (m-SWCNTs) from semiconducting (s-) ones by stirring or sonicating SWCNT powder in tetramethylene sulfone (TMS)/chloroform solution with nitronium hexafluoroantimonate (NO2SbF6: NHFA) and nitronium tetrafluoroborate (NO2BF4: NTFB). Positively charged nitronium ions (NO2+) were intercalated into nanotube bundles, where the intercalation was promoted also by the counterions. Nitronium ions selectively attacked the sidewall of the m-SWCNTs due to the abundant presence of electron density at the Fermi level, thus yielding stronger binding energy as compared to the counterpart s-SWCNTs. The s-SWCNTs were left on the filter after filtration, whereas the m-SWCNTs were disintegrated and drained away as amorphous carbons. The effectiveness of removing m-SWCNTs was confirmed by the resonant Raman spectra and absorption spectra.",

author = "An, {Kay Hyeok} and Park, {Jin Sung} and Yang, {Cheol Min} and Jeong, {Seung Yol} and Lim, {Seong Chu} and Chul Kang and Son, {Joo Hiuk} and Jeong, {Mun Seok} and Lee, {Young Hee}",

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doi = "10.1021/ja0428199",

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T1 - A diameter-selective attack of metallic carbon nanotubes by nitronium ions

AU - An, Kay Hyeok

AU - Park, Jin Sung

AU - Yang, Cheol Min

AU - Jeong, Seung Yol

AU - Lim, Seong Chu

AU - Kang, Chul

AU - Son, Joo Hiuk

AU - Jeong, Mun Seok

AU - Lee, Young Hee

PY - 2005/4/13

Y1 - 2005/4/13

N2 - We have found a method for a diameter-selective removal of metallic single-walled carbon nanotubes (m-SWCNTs) from semiconducting (s-) ones by stirring or sonicating SWCNT powder in tetramethylene sulfone (TMS)/chloroform solution with nitronium hexafluoroantimonate (NO2SbF6: NHFA) and nitronium tetrafluoroborate (NO2BF4: NTFB). Positively charged nitronium ions (NO2+) were intercalated into nanotube bundles, where the intercalation was promoted also by the counterions. Nitronium ions selectively attacked the sidewall of the m-SWCNTs due to the abundant presence of electron density at the Fermi level, thus yielding stronger binding energy as compared to the counterpart s-SWCNTs. The s-SWCNTs were left on the filter after filtration, whereas the m-SWCNTs were disintegrated and drained away as amorphous carbons. The effectiveness of removing m-SWCNTs was confirmed by the resonant Raman spectra and absorption spectra.

AB - We have found a method for a diameter-selective removal of metallic single-walled carbon nanotubes (m-SWCNTs) from semiconducting (s-) ones by stirring or sonicating SWCNT powder in tetramethylene sulfone (TMS)/chloroform solution with nitronium hexafluoroantimonate (NO2SbF6: NHFA) and nitronium tetrafluoroborate (NO2BF4: NTFB). Positively charged nitronium ions (NO2+) were intercalated into nanotube bundles, where the intercalation was promoted also by the counterions. Nitronium ions selectively attacked the sidewall of the m-SWCNTs due to the abundant presence of electron density at the Fermi level, thus yielding stronger binding energy as compared to the counterpart s-SWCNTs. The s-SWCNTs were left on the filter after filtration, whereas the m-SWCNTs were disintegrated and drained away as amorphous carbons. The effectiveness of removing m-SWCNTs was confirmed by the resonant Raman spectra and absorption spectra.

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DO - 10.1021/ja0428199

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SN - 0002-7863

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SP - 5196

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JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 14

ER -

A diameter-selective attack of metallic carbon nanotubes by nitronium ions

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