Comparative study on diameter distribution of single-walled carbon nanotubes using growth templates with different pore sizes: Zeolite-L, ZSM-5, and MCM-41

2014 ◽  
Vol 14 (12) ◽  
pp. 1633-1638 ◽  
Author(s):  
Eun-Hye Kwak ◽  
Kyung Byung Yoon ◽  
Goo-Hwan Jeong
Keyword(s):  
Carbon Nanotubes ◽  
Comparative Study ◽  
Single Walled Carbon Nanotubes ◽  
Diameter Distribution ◽  
Single Walled Carbon ◽  
Pore Sizes ◽  
Zeolite L ◽  
Walled Carbon Nanotubes ◽  
Mcm 41

Diameter-Controlled Synthesis of Single-Walled Carbon Nanotubes

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.

Selective Synthesis of Single-Walled Carbon Nanotubes by Blending Catalysts

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.

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

2019 ◽  
Vol 3 (9) ◽  
pp. 1882-1887 ◽  
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.

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

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document