Novel method for carbon nanotube growth using vapor-phase catalyst delivery

2020 ◽  
Vol 13 (05) ◽  
pp. 2050026
Author(s):  
Takayuki Nakano ◽  
Takahiro Kikuchi ◽  
Yuki Usuda ◽  
Yoku Inoue
Keyword(s):  
Vapor Phase ◽  
Chemical Vapor ◽  
Growth Conditions ◽  
Catalyst Precursor ◽  
Synthesis Conditions ◽  
Hcl Gas ◽  
Catalyst Formation ◽  
Novel Method ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth

In this study, we demonstrated a novel method to grow carbon nanotubes (CNTs) by chloride-mediated chemical vapor deposition with hydride vapor-phase nucleated catalyst (HVPN). In the HVPN method, FeCl2 as a catalyst precursor was produced by an in situ chemical reaction between Fe powder and HCl gas. After the synthesis of FeCl2, CNTs were grown by supplying acetylene. We studied growth conditions for the catalyst formation process in HVPN method. High-quality CNT forests were grown by optimizing the FeCl2 synthesis conditions. This study has established the HVPN method as a novel, highly controllable way to grow CNT forests.

Aligned carbon nanotube growth under oxidative ambient

2001 ◽  
Vol 16 (11) ◽  
pp. 3107-3110 ◽  
Author(s):  
Anyuan Cao ◽  
Xianfeng Zhang ◽  
Cailu Xu ◽  
Ji Liang ◽  
Dehai Wu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nanotubes ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Deposition Method ◽  
Tubular Structures ◽  
Potential Applications ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth

Carbon nanotubes (CNTs) are always produced under a reductive ambient with hydrogen present using the chemical vapor deposition method. Oxidative media, such as carbon dioxide and oxygen, could damage the tubular structures by opening the nanotube ends or etching the tube walls. Here we report the synthesis of aligned defective, but clean, CNTs in the presence of water vapor. The tube walls were found broken as well as the tube ends. CNTs with a large amount of exposed broken sites on their tube walls have potential applications in many areas such as energy storage.

Reactor Scale Model of Multiwalled Carbon Nanotube Growth in a Tube Flow Chemical Vapor Deposition Reactor

2009 ◽  
Author(s):  
Jeffrey J. Lombardo ◽  
Wilson K. S. Chiu
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotubes ◽  
Computational Models ◽  
Chemical Vapor ◽  
Scale Model ◽  
Tube Flow ◽  
Multiwalled Carbon ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth

Even though a large number of applications for multiwalled carbon nanotubes have been proposed, there is relatively limited knowledge about the optimal conditions in which to create multiwalled carbon nanotubes (MWNTs). Computational models have been shown to be a promising tool to determine the best carbon nanotube growth conditions. In this paper the growth of MWNTs in a tube flow CVD reactor was studied through the use of the commercial software package COMSOL, where details steps have been described to reformulate an existing single walled carbon nanotube (SWNT) growth model to accommodate MWNTs followed by validation and growth rate prediction. Higher growth rates were predicted for MWNTs than SWNTs which is a result of the increase in pathways for carbon to form carbon nanotubes based on the additional walls. Results indicate that selecting the correct number of walls can be important to the results of the model.

Temperature and time dependence study of single-walled carbon nanotube growth by catalytic chemical vapor deposition

Carbon ◽  
2010 ◽  
Vol 48 (4) ◽  
pp. 1279-1288 ◽  
Author(s):  
Charlotte T.M. Kwok ◽  
Brandon J. Reizman ◽  
Daniel E. Agnew ◽  
Gurjit S. Sandhu ◽  
J. Weistroffer ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Time Dependence ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Walled Carbon Nanotube ◽  
Catalytic Chemical Vapor Deposition ◽  
Single Walled Carbon ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth
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