Effect of time on the metal-support (Fe-MgO) interaction in CVD synthesis of single-walled carbon nanotubes

AbstractA study on the effect of the metal-support interaction by employing iron particles supported on magnesium oxide (MgO) nanopowder in an alcohol-CVD process for single-walled carbon nanotubes growth is presented. Upon the prolongation of the process time, three main observations were detected: (i) decrease of the mean nanotubes diameter, (ii) reduction of the diameter distribution by the factor of two, (iii) increase of relative purity of the samples.

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CVD Synthesis and Diameter Distribution of SingleWalled Carbon Nanotubes

Acta Physico-Chimica Sinica ◽

10.3866/pku.whxb20010810 ◽

2001 ◽

Vol 17 (08) ◽

pp. 718-722

Author(s):

Wei Zhong ◽

◽

Chen Yan ◽

Liu Zhong-Fan

Keyword(s):

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Diameter Distribution ◽

Single Walled Carbon ◽

Cvd Synthesis ◽

Walled Carbon Nanotubes

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Low-temperature synthesis of single-walled carbon nanotubes with a narrow diameter distribution using size-classified catalyst nanoparticles

Chemical Physics Letters ◽

10.1016/j.cplett.2006.03.017 ◽

2006 ◽

Vol 422 (4-6) ◽

pp. 481-487 ◽

Cited By ~ 57

Author(s):

Daiyu Kondo ◽

Shintaro Sato ◽

Yuji Awano

Keyword(s):

Carbon Nanotubes ◽

Low Temperature ◽

Single Walled Carbon Nanotubes ◽

Diameter Distribution ◽

Low Temperature Synthesis ◽

Temperature Synthesis ◽

Catalyst Nanoparticles ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes ◽

Narrow Diameter Distribution

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Diameter-Controlled Synthesis of Single-Walled Carbon Nanotubes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.652-654.151 ◽

2013 ◽

Vol 652-654 ◽

pp. 151-154

Author(s):

Ting Kai Zhao ◽

Xing Zhao ◽

Jin Yan ◽

Li Du ◽

Tie Hu Li

Keyword(s):

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Recent Decade ◽

Diameter Distribution ◽

Future Directions ◽

Single Walled Carbon ◽

Existing Problems ◽

Multi Walled Carbon Nanotubes ◽

Synthesis Of Carbon Nanotubes ◽

Walled Carbon Nanotubes

With the technological progress in the synthesis of multi-walled carbon nanotubes and single-walled carbon nanotubes, more attention was attracted to the synthesis of carbon nanotubes with diameter distribution, ideal length, different chirality and certain orientation. In recent decade, all these factors have been investigated and a number of progresses have been made for the application of carbon nanotubes. The latest researches on the growth of diameter-controlled single-walled carbon nanotubes are reviewed and discussed. The existing problems and challenges of the synthesis processes have been addressed in the future directions.

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Selective Synthesis of Single-Walled Carbon Nanotubes by Blending Catalysts

ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 2 ◽

10.1115/ht2007-32524 ◽

2007 ◽

Author(s):

Shuhei Inoue ◽

Takeshi Nakajima ◽

Kazuya Nomura ◽

Yoshihiro Kikuchi

Keyword(s):

Carbon Nanotubes ◽

Fermi Level ◽

Chemical Vapor ◽

Single Walled Carbon Nanotubes ◽

Diameter Distribution ◽

Efficient Catalyst ◽

Single Walled Carbon ◽

Similar Density ◽

Walled Carbon Nanotubes ◽

Diameter Distributions

Single-walled carbon nanotubes are considered the most attractive material and a lot of synthesis processes are developed. Among these synthesis processes chemical vapor deposition processes are considered to be most suitable for macroscopic production. In many CVD processes the alcohol catalytic CVD process can be the best process because it can produce very pure nanotubes without any purification. However, cobalt is essential as a catalyst that makes the flexibility of catalysts restricted. In this paper, our investigation mainly focused on as follows: The efficiency of combined catalysts with/without cobalt. The diameter distributions against catalysts density. The electrical states of catalysts near Fermi level. Consequently, almost all of cobalt containing catalysts worked well, and the diameter distributions were proportional to the particle size. Efficient catalysts had enough states around Fermi level and the cobalt-less efficient catalyst cluster model showed the similar density of state to the cobalt cluster. Thus, noticing to the DOS, other efficient catalysts can be discovered and the diameter distribution will be controllable by adjusting temperature, a catalyst size, and a catalyst combination without any complicated techniques and facilities.

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Iridium-catalyzed growth of single-walled carbon nanotubes with a bicentric diameter distribution

Materials Chemistry Frontiers ◽

10.1039/c9qm00267g ◽

2019 ◽

Vol 3 (9) ◽

pp. 1882-1887 ◽

Cited By ~ 3

Author(s):

Han Xue ◽

Liantao Xin ◽

Ziwei Xu ◽

Ruiqin Bai ◽

Qianru Wu ◽

...

Keyword(s):

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Diameter Distribution ◽

Single Walled Carbon ◽

Iridium Nanoparticles ◽

Walled Carbon Nanotubes

Single-walled carbon nanotubes grown on iridium nanoparticles exhibit a bicentric diameter distribution.

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Spectroscopic study of the diameter distribution of B-doped single-walled carbon nanotubes

physica status solidi (b) ◽

10.1002/pssb.201200209 ◽

2012 ◽

Vol 249 (12) ◽

pp. 2469-2472 ◽

Cited By ~ 3

Author(s):

G. Ruiz-Soria ◽

S. Daothong ◽

T. Pichler ◽

P. Ayala

Keyword(s):

Carbon Nanotubes ◽

Spectroscopic Study ◽

Single Walled Carbon Nanotubes ◽

Diameter Distribution ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes

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Low Temperature Growth of Single-Walled Carbon Nanotubes from Pt Catalysts under Low Ethanol Pressure by Alcohol Gas Source Method

Journal of Nanotechnology ◽

10.1155/2012/690304 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 6

Author(s):

Hiroki Kondo ◽

Naoya Fukuoka ◽

Takahiro Maruyama

Keyword(s):

Carbon Nanotubes ◽

High Vacuum ◽

Single Walled Carbon Nanotubes ◽

Average Diameter ◽

Diameter Distribution ◽

Pt Catalysts ◽

Single Walled Carbon ◽

Source Method ◽

Gas Source ◽

Walled Carbon Nanotubes

Growth of single-walled carbon nanotubes (SWNTs) was carried out on SiO2/Si substrates with Pt catalysts at 400, 450, and 700°C under various ethanol pressures using an alcohol gas source method in a high vacuum, and the grown SWNTs were characterized by scanning electron microscopy (SEM) and Raman spectroscopy. Irrespective of the growth temperature, both G band and RBM peaks were observed in the Raman spectra under the optimal ethanol pressure (~1×10−3Pa), indicating that SWNTs grew below 450°C from Pt. At 400°C, both average diameter and diameter distribution were drastically reduced, and those were fairly smaller and narrower, compared to those for SWNTs grown with Co.

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