CVD synthesis and purification of single-walled carbon nanotubes using silica-supported metal catalyst

R. Engel-Herbert; H. Pforte; T. Hesjedal

doi:10.1016/j.matlet.2006.10.004

CVD synthesis and purification of single-walled carbon nanotubes using silica-supported metal catalyst

R. Engel-Herbert, H. Pforte, T. Hesjedal

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35 Citations (SciVal)

Abstract

We report the growth of single-walled carbon nanotubes (SWNTs) from silica aerogel by methane chemical vapor deposition (CVD). Bimetallic Fe/Mo supported by amorphous silica forms nanostructures that are catalytically active at the growth temperature. Despite the flexibility gained by using silica as a support matrix, the as-grown nanotube samples need to be further purified for applications in nanodevices. Our experiments show that the treatment in hydrofluoric acid selectively removes the silica matrix,while the amorphous carbon deposits can be selectively removed by oxidation. The influence of the oxidation and etching parameters on the SWNT yield is discussed. The optimized purification procedure renders SWNTs only.

Original language	English (US)
Pages (from-to)	2589-2593
Number of pages	5
Journal	Materials Letters
Volume	61
Issue number	11-12
DOIs	https://doi.org/10.1016/j.matlet.2006.10.004
State	Published - May 2007

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2006.10.004

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title = "CVD synthesis and purification of single-walled carbon nanotubes using silica-supported metal catalyst",

abstract = "We report the growth of single-walled carbon nanotubes (SWNTs) from silica aerogel by methane chemical vapor deposition (CVD). Bimetallic Fe/Mo supported by amorphous silica forms nanostructures that are catalytically active at the growth temperature. Despite the flexibility gained by using silica as a support matrix, the as-grown nanotube samples need to be further purified for applications in nanodevices. Our experiments show that the treatment in hydrofluoric acid selectively removes the silica matrix,while the amorphous carbon deposits can be selectively removed by oxidation. The influence of the oxidation and etching parameters on the SWNT yield is discussed. The optimized purification procedure renders SWNTs only.",

author = "R. Engel-Herbert and H. Pforte and T. Hesjedal",

note = "Funding Information: This work has been in parts performed at the PDI in Berlin (we thank M. Ramsteiner for helping with the Raman measurements). Partial financial support is provided by the NSERC of Canada. The authors would like to express their thanks to Degussa AG for supplying the Aerosil samples. ",

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doi = "10.1016/j.matlet.2006.10.004",

language = "English (US)",

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journal = "Materials Letters",

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T1 - CVD synthesis and purification of single-walled carbon nanotubes using silica-supported metal catalyst

AU - Engel-Herbert, R.

AU - Pforte, H.

AU - Hesjedal, T.

N1 - Funding Information: This work has been in parts performed at the PDI in Berlin (we thank M. Ramsteiner for helping with the Raman measurements). Partial financial support is provided by the NSERC of Canada. The authors would like to express their thanks to Degussa AG for supplying the Aerosil samples.

PY - 2007/5

Y1 - 2007/5

N2 - We report the growth of single-walled carbon nanotubes (SWNTs) from silica aerogel by methane chemical vapor deposition (CVD). Bimetallic Fe/Mo supported by amorphous silica forms nanostructures that are catalytically active at the growth temperature. Despite the flexibility gained by using silica as a support matrix, the as-grown nanotube samples need to be further purified for applications in nanodevices. Our experiments show that the treatment in hydrofluoric acid selectively removes the silica matrix,while the amorphous carbon deposits can be selectively removed by oxidation. The influence of the oxidation and etching parameters on the SWNT yield is discussed. The optimized purification procedure renders SWNTs only.

AB - We report the growth of single-walled carbon nanotubes (SWNTs) from silica aerogel by methane chemical vapor deposition (CVD). Bimetallic Fe/Mo supported by amorphous silica forms nanostructures that are catalytically active at the growth temperature. Despite the flexibility gained by using silica as a support matrix, the as-grown nanotube samples need to be further purified for applications in nanodevices. Our experiments show that the treatment in hydrofluoric acid selectively removes the silica matrix,while the amorphous carbon deposits can be selectively removed by oxidation. The influence of the oxidation and etching parameters on the SWNT yield is discussed. The optimized purification procedure renders SWNTs only.

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DO - 10.1016/j.matlet.2006.10.004

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SP - 2589

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JO - Materials Letters

JF - Materials Letters

IS - 11-12

ER -

CVD synthesis and purification of single-walled carbon nanotubes using silica-supported metal catalyst

Abstract

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