Phonon dispersion of small diameter semiconducting chiral carbon nanotubes - a theoretical study

2008 ◽  
Vol 245 (10) ◽  
pp. 2137-2140 ◽  
Author(s):  
János Koltai ◽  
Viktor Zólyomi ◽  
Jenő Kürti
Keyword(s):  
Carbon Nanotubes ◽  
Theoretical Study ◽  
Phonon Dispersion ◽  
Small Diameter ◽  
Chiral Carbon

Rectification in Chiral Carbon Nanotubes with Hot Electron Injection

2020 ◽  
Vol 131 (3) ◽  
pp. 456-459
Author(s):  
S. S. Abukari ◽  
R. Musah ◽  
M. Amekpewu ◽  
S. Y. Mensah ◽  
N. G. Mensah ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Injection ◽  
Hot Electron ◽  
Hot Electron Injection ◽  
Chiral Carbon

The Influence of Fe/Al Molar Ratio on Microreactor-Based Catalyst Preparation and Carbon Nanotube Preparation

2021 ◽  
Vol 1036 ◽  
pp. 130-136
Author(s):  
Ting Qun Tan ◽  
Lei Geng ◽  
Yan Lin ◽  
Yan He
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Small Diameter ◽  
High Specific Surface Area ◽  
Detection Methods ◽  
Molar Ratio ◽  
High Catalytic Activity

In order to prepare carbon nanotubes with high specific surface area, small diameter, low resistivity, high purity and high catalytic activity, the Fe-Mo/Al2O3 catalyst was prepared based on the microreactor. The influence of different Fe/Al molar ratios on the catalyst and the carbon nanotubes prepared was studied through BET, SEM, TEM and other detection methods. Studies have shown that the pore structure of the catalyst is dominated by slit pores at a lower Fe/Al molar ratio. The catalytic activity is the highest when the Fe/Al molar ratio is 1:1, reaching 74.1%. When the Fe/Al molar ratio is 1:2, the catalyst has a higher specific surface area, the maximum pore size is 8.63 nm, and the four-probe resistivity and ash content of the corresponding carbon nanotubes are the lowest. The higher the proportion of aluminum, the higher the specific surface area of the catalyst and the carbon nanotubes, and the finer the diameter of the carbon nanotubes, which gradually tends to relax. The results show that when the Fe/Al molar ratio is 1:2, although the catalytic activity of the catalyst is not the highest, the carbon nanotubes prepared have the best performance.

Theoretical Study of Effective Parameters in Catalytic Growth of Carbon Nanotubes

2017 ◽  
Vol 214 (11) ◽  
pp. 1700101 ◽  
Author(s):  
Hamid Shahivandi ◽  
Majid Vaezzadeh ◽  
Mohammadreza Saeidi
Keyword(s):  
Carbon Nanotubes ◽  
Theoretical Study ◽  
Effective Parameters ◽  
Catalytic Growth

Side-Wall Opening of Single-Walled Carbon Nanotubes (SWCNTs) by Chemical Modification: A Critical Theoretical Study

2004 ◽  
Vol 116 (12) ◽  
pp. 1578-1580 ◽  
Author(s):  
Zhongfang Chen ◽  
Shigeru Nagase ◽  
Andreas Hirsch ◽  
Robert C Haddon ◽  
Walter Thiel ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Modification ◽  
Theoretical Study ◽  
Side Wall ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes
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