Selective removal of metallic single-walled carbon nanotubes with small diameters by using nitric and sulfuric acids

Cheol Min Yang; Jin Sung Park; Kay Hyeok An; Seong Chu Lim; Kwanyong Seo; Bongsoo Kim; Kyung Ah Park; Seungwu Han; Chong Yun Park; Young Hee Lee

doi:10.1021/jp053245c

Selective removal of metallic single-walled carbon nanotubes with small diameters by using nitric and sulfuric acids

Cheol Min Yang
, Jin Sung Park
, Kay Hyeok An
, Seong Chu Lim
, Kwanyong Seo
, Bongsoo Kim
, Kyung Ah Park
, Seungwu Han
, Chong Yun Park
, Young Hee Lee

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

122 Scopus citations

Abstract

Coexistence of metallic and semiconducting carbon nanotubes has often been a bottleneck in many applications and much fundamental research. Single-walled carbon nanotubes (SWCNTs) were dissolved in HNO₃/H₂SO ₄ mixture to confirm differing reactivity between metallic (m) and semiconducting (s) SWCNTs. With HNO₃/ H₂SO₄ treatment, s-SWCNTs remained intact, while m-SWCNTs were completely removed for SWCNTs with small diameters less than 1.1 nm, which was confirmed by resonant Raman and optical absorption spectra. We also showed that nitronium ions (NO₂⁺) dissolved in the HNO₃/H ₂SO₄ solution could preferably attack the m-SWCNTs, which was supported by our theoretical calculation. This clear selectivity can be explained by the preferential adsorption of positively charged NO ₂⁺ on m-SWCNTs due to more available electron densities at the Fermi level in the m-SWCNTs. We report for the first time a selective removal of small-diameter m-SWCNTs by using HNO₃/H₂SO ₄ solution, which presented a striking contrast to the diameter-selective removal of SWCNTs by oxidative etching reported previously.

Original language	English
Pages (from-to)	19242-19248
Number of pages	7
Journal	Journal of Physical Chemistry B
Volume	109
Issue number	41
DOIs	https://doi.org/10.1021/jp053245c
State	Published - 20 Oct 2005

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@article{7b053f312c98495baddfaec7f83217f8,

title = "Selective removal of metallic single-walled carbon nanotubes with small diameters by using nitric and sulfuric acids",

abstract = "Coexistence of metallic and semiconducting carbon nanotubes has often been a bottleneck in many applications and much fundamental research. Single-walled carbon nanotubes (SWCNTs) were dissolved in HNO3/H2SO 4 mixture to confirm differing reactivity between metallic (m) and semiconducting (s) SWCNTs. With HNO3/ H2SO4 treatment, s-SWCNTs remained intact, while m-SWCNTs were completely removed for SWCNTs with small diameters less than 1.1 nm, which was confirmed by resonant Raman and optical absorption spectra. We also showed that nitronium ions (NO2+) dissolved in the HNO3/H 2SO4 solution could preferably attack the m-SWCNTs, which was supported by our theoretical calculation. This clear selectivity can be explained by the preferential adsorption of positively charged NO 2+ on m-SWCNTs due to more available electron densities at the Fermi level in the m-SWCNTs. We report for the first time a selective removal of small-diameter m-SWCNTs by using HNO3/H2SO 4 solution, which presented a striking contrast to the diameter-selective removal of SWCNTs by oxidative etching reported previously.",

author = "Yang, \{Cheol Min\} and Park, \{Jin Sung\} and An, \{Kay Hyeok\} and Lim, \{Seong Chu\} and Kwanyong Seo and Bongsoo Kim and Park, \{Kyung Ah\} and Seungwu Han and Park, \{Chong Yun\} and Lee, \{Young Hee\}",

year = "2005",

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doi = "10.1021/jp053245c",

language = "English",

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journal = "Journal of Physical Chemistry B",

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TY - JOUR

T1 - Selective removal of metallic single-walled carbon nanotubes with small diameters by using nitric and sulfuric acids

AU - Yang, Cheol Min

AU - Park, Jin Sung

AU - An, Kay Hyeok

AU - Lim, Seong Chu

AU - Seo, Kwanyong

AU - Kim, Bongsoo

AU - Park, Kyung Ah

AU - Han, Seungwu

AU - Park, Chong Yun

AU - Lee, Young Hee

PY - 2005/10/20

Y1 - 2005/10/20

N2 - Coexistence of metallic and semiconducting carbon nanotubes has often been a bottleneck in many applications and much fundamental research. Single-walled carbon nanotubes (SWCNTs) were dissolved in HNO3/H2SO 4 mixture to confirm differing reactivity between metallic (m) and semiconducting (s) SWCNTs. With HNO3/ H2SO4 treatment, s-SWCNTs remained intact, while m-SWCNTs were completely removed for SWCNTs with small diameters less than 1.1 nm, which was confirmed by resonant Raman and optical absorption spectra. We also showed that nitronium ions (NO2+) dissolved in the HNO3/H 2SO4 solution could preferably attack the m-SWCNTs, which was supported by our theoretical calculation. This clear selectivity can be explained by the preferential adsorption of positively charged NO 2+ on m-SWCNTs due to more available electron densities at the Fermi level in the m-SWCNTs. We report for the first time a selective removal of small-diameter m-SWCNTs by using HNO3/H2SO 4 solution, which presented a striking contrast to the diameter-selective removal of SWCNTs by oxidative etching reported previously.

AB - Coexistence of metallic and semiconducting carbon nanotubes has often been a bottleneck in many applications and much fundamental research. Single-walled carbon nanotubes (SWCNTs) were dissolved in HNO3/H2SO 4 mixture to confirm differing reactivity between metallic (m) and semiconducting (s) SWCNTs. With HNO3/ H2SO4 treatment, s-SWCNTs remained intact, while m-SWCNTs were completely removed for SWCNTs with small diameters less than 1.1 nm, which was confirmed by resonant Raman and optical absorption spectra. We also showed that nitronium ions (NO2+) dissolved in the HNO3/H 2SO4 solution could preferably attack the m-SWCNTs, which was supported by our theoretical calculation. This clear selectivity can be explained by the preferential adsorption of positively charged NO 2+ on m-SWCNTs due to more available electron densities at the Fermi level in the m-SWCNTs. We report for the first time a selective removal of small-diameter m-SWCNTs by using HNO3/H2SO 4 solution, which presented a striking contrast to the diameter-selective removal of SWCNTs by oxidative etching reported previously.

UR - https://www.scopus.com/pages/publications/27544469852

U2 - 10.1021/jp053245c

DO - 10.1021/jp053245c

M3 - Article

AN - SCOPUS:27544469852

SN - 1520-6106

VL - 109

SP - 19242

EP - 19248

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 41

ER -

Selective removal of metallic single-walled carbon nanotubes with small diameters by using nitric and sulfuric acids

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