Millimeter-tall single-walled carbon nanotube forests grown from ethanol

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Millimeter-tall vertically-aligned carbon nanotubes (VA-CNTs) were grown from ethanol under ambient pressure by Co-catalyzed chemical vapor deposition (CVD), with systematic optimization of the CVD temperature and catalytic conditions using combinatorial catalyst libraries. We investigated the use of both aluminum oxide and silicon oxide as underlayers for the Co catalyst and found that VA-CNTs grew to millimeter heights in 15-30 min when the pyrolysis of ethanol was carried out at high temperatures (≥850 °C) and long residence times (≥10 s). Thick Co catalytic layers (≥1.3 nm) produced (sub)millimeter-tall multi-walled VA-CNTs on both the aluminum oxide and silicon oxide underlayers. However, thin Co catalytic layers (0.62-1.0 nm) produced (sub)millimeter-tall VA-CNTs, which consisted mainly of single-walled CNTs, only on the aluminum oxide underlayers. Stripe patterns were found in the VA-CNTs near the substrate on both aluminum oxide and silicon oxide, indicating some instability prior to growth termination. The possible roles of aluminum oxide in growing millimeter-tall single-walled VA-CNTs were discussed.

Original languageEnglish
Pages (from-to)2203-2211
Number of pages9
JournalCarbon
Volume48
Issue number8
DOIs
Publication statusPublished - 2010 Jul
Externally publishedYes

Fingerprint

Carbon Nanotubes
Single-walled carbon nanotubes (SWCN)
Aluminum Oxide
Carbon nanotubes
Ethanol
Silicon oxides
Aluminum
Oxides
Chemical vapor deposition
Catalysts
Pyrolysis
Temperature
Substrates

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Millimeter-tall single-walled carbon nanotube forests grown from ethanol. / Sugime, Hisashi; Noda, Suguru.

In: Carbon, Vol. 48, No. 8, 07.2010, p. 2203-2211.

Research output: Contribution to journalArticle

@article{866922b29ea841a9b8835806f98f0f7e,
title = "Millimeter-tall single-walled carbon nanotube forests grown from ethanol",
abstract = "Millimeter-tall vertically-aligned carbon nanotubes (VA-CNTs) were grown from ethanol under ambient pressure by Co-catalyzed chemical vapor deposition (CVD), with systematic optimization of the CVD temperature and catalytic conditions using combinatorial catalyst libraries. We investigated the use of both aluminum oxide and silicon oxide as underlayers for the Co catalyst and found that VA-CNTs grew to millimeter heights in 15-30 min when the pyrolysis of ethanol was carried out at high temperatures (≥850 °C) and long residence times (≥10 s). Thick Co catalytic layers (≥1.3 nm) produced (sub)millimeter-tall multi-walled VA-CNTs on both the aluminum oxide and silicon oxide underlayers. However, thin Co catalytic layers (0.62-1.0 nm) produced (sub)millimeter-tall VA-CNTs, which consisted mainly of single-walled CNTs, only on the aluminum oxide underlayers. Stripe patterns were found in the VA-CNTs near the substrate on both aluminum oxide and silicon oxide, indicating some instability prior to growth termination. The possible roles of aluminum oxide in growing millimeter-tall single-walled VA-CNTs were discussed.",
author = "Hisashi Sugime and Suguru Noda",
year = "2010",
month = "7",
doi = "10.1016/j.carbon.2010.02.024",
language = "English",
volume = "48",
pages = "2203--2211",
journal = "Carbon",
issn = "0008-6223",
publisher = "Elsevier Limited",
number = "8",

}

TY - JOUR

T1 - Millimeter-tall single-walled carbon nanotube forests grown from ethanol

AU - Sugime, Hisashi

AU - Noda, Suguru

PY - 2010/7

Y1 - 2010/7

N2 - Millimeter-tall vertically-aligned carbon nanotubes (VA-CNTs) were grown from ethanol under ambient pressure by Co-catalyzed chemical vapor deposition (CVD), with systematic optimization of the CVD temperature and catalytic conditions using combinatorial catalyst libraries. We investigated the use of both aluminum oxide and silicon oxide as underlayers for the Co catalyst and found that VA-CNTs grew to millimeter heights in 15-30 min when the pyrolysis of ethanol was carried out at high temperatures (≥850 °C) and long residence times (≥10 s). Thick Co catalytic layers (≥1.3 nm) produced (sub)millimeter-tall multi-walled VA-CNTs on both the aluminum oxide and silicon oxide underlayers. However, thin Co catalytic layers (0.62-1.0 nm) produced (sub)millimeter-tall VA-CNTs, which consisted mainly of single-walled CNTs, only on the aluminum oxide underlayers. Stripe patterns were found in the VA-CNTs near the substrate on both aluminum oxide and silicon oxide, indicating some instability prior to growth termination. The possible roles of aluminum oxide in growing millimeter-tall single-walled VA-CNTs were discussed.

AB - Millimeter-tall vertically-aligned carbon nanotubes (VA-CNTs) were grown from ethanol under ambient pressure by Co-catalyzed chemical vapor deposition (CVD), with systematic optimization of the CVD temperature and catalytic conditions using combinatorial catalyst libraries. We investigated the use of both aluminum oxide and silicon oxide as underlayers for the Co catalyst and found that VA-CNTs grew to millimeter heights in 15-30 min when the pyrolysis of ethanol was carried out at high temperatures (≥850 °C) and long residence times (≥10 s). Thick Co catalytic layers (≥1.3 nm) produced (sub)millimeter-tall multi-walled VA-CNTs on both the aluminum oxide and silicon oxide underlayers. However, thin Co catalytic layers (0.62-1.0 nm) produced (sub)millimeter-tall VA-CNTs, which consisted mainly of single-walled CNTs, only on the aluminum oxide underlayers. Stripe patterns were found in the VA-CNTs near the substrate on both aluminum oxide and silicon oxide, indicating some instability prior to growth termination. The possible roles of aluminum oxide in growing millimeter-tall single-walled VA-CNTs were discussed.

UR - http://www.scopus.com/inward/record.url?scp=77950519805&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77950519805&partnerID=8YFLogxK

U2 - 10.1016/j.carbon.2010.02.024

DO - 10.1016/j.carbon.2010.02.024

M3 - Article

AN - SCOPUS:77950519805

VL - 48

SP - 2203

EP - 2211

JO - Carbon

JF - Carbon

SN - 0008-6223

IS - 8

ER -