Steam purification for the removal of graphitic shells coating catalytic particles and the shortening of single-walled carbon nanotubes

Belén Ballesteros; Gerard Tobias; Lidong Shao; Eva Pellicer; Josep Nogués; Ernest Mendoza; Malcolm L.H. Green

doi:10.1002/smll.200701283

Steam purification for the removal of graphitic shells coating catalytic particles and the shortening of single-walled carbon nanotubes

Belén Ballesteros, Gerard Tobias, Lidong Shao, Eva Pellicer, Josep Nogués, Ernest Mendoza, Malcolm L.H. Green

Department of Physics

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

66 Citations (Scopus)

Abstract

Purification and shortening of single-walled carbon nanotubes (SWNTs) is carried out by treatment with steam. During the steam purification the graphitic shells coating the catalytic metal particles are removed. Consequently, the exposed catalytic particles can be easily dissolved by treatment with hydrochloric acid. No damage to the carbon nanotube tubular structure is observed, even after prolonged treatment with steam. Samples are characterized by HRTEM, TGA, magnetic measurements, Raman spec-troscopy, AFM, and XPS. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

Original language	English
Pages (from-to)	1501-1506
Journal	Small
Volume	4
Issue number	9
DOIs	https://doi.org/10.1002/smll.200701283
Publication status	Published - 1 Jan 2008

Keywords

Carbon nanotubes
Catalysis
Purification
Shortening
Steam

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abstract = "Purification and shortening of single-walled carbon nanotubes (SWNTs) is carried out by treatment with steam. During the steam purification the graphitic shells coating the catalytic metal particles are removed. Consequently, the exposed catalytic particles can be easily dissolved by treatment with hydrochloric acid. No damage to the carbon nanotube tubular structure is observed, even after prolonged treatment with steam. Samples are characterized by HRTEM, TGA, magnetic measurements, Raman spec-troscopy, AFM, and XPS. {\textcopyright} 2008 Wiley-VCH Verlag GmbH & Co. KGaA.",

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Steam purification for the removal of graphitic shells coating catalytic particles and the shortening of single-walled carbon nanotubes. / Ballesteros, Belén; Tobias, Gerard; Shao, Lidong; Pellicer, Eva; Nogués, Josep; Mendoza, Ernest; Green, Malcolm L.H.

In: Small, Vol. 4, No. 9, 01.01.2008, p. 1501-1506.

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

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T1 - Steam purification for the removal of graphitic shells coating catalytic particles and the shortening of single-walled carbon nanotubes

AU - Ballesteros, Belén

AU - Tobias, Gerard

AU - Shao, Lidong

AU - Pellicer, Eva

AU - Nogués, Josep

AU - Mendoza, Ernest

AU - Green, Malcolm L.H.

PY - 2008/1/1

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N2 - Purification and shortening of single-walled carbon nanotubes (SWNTs) is carried out by treatment with steam. During the steam purification the graphitic shells coating the catalytic metal particles are removed. Consequently, the exposed catalytic particles can be easily dissolved by treatment with hydrochloric acid. No damage to the carbon nanotube tubular structure is observed, even after prolonged treatment with steam. Samples are characterized by HRTEM, TGA, magnetic measurements, Raman spec-troscopy, AFM, and XPS. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

AB - Purification and shortening of single-walled carbon nanotubes (SWNTs) is carried out by treatment with steam. During the steam purification the graphitic shells coating the catalytic metal particles are removed. Consequently, the exposed catalytic particles can be easily dissolved by treatment with hydrochloric acid. No damage to the carbon nanotube tubular structure is observed, even after prolonged treatment with steam. Samples are characterized by HRTEM, TGA, magnetic measurements, Raman spec-troscopy, AFM, and XPS. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

KW - Carbon nanotubes

KW - Catalysis

KW - Purification

KW - Shortening

KW - Steam

U2 - 10.1002/smll.200701283

DO - 10.1002/smll.200701283

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SN - 1613-6810

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