Synthesis of nitrogen doped coiled double walled carbon nanotubes by chemical vapor deposition method for supercapacitor applications

2016 ◽  
Vol 16 (8) ◽  
pp. 816-825 ◽  
Author(s):  
V. Thirumal ◽  
A. Pandurangan ◽  
R. Jayavel ◽  
S.R. Krishnamoorthi ◽  
R. Ilangovan
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Deposition Method ◽  
Nitrogen Doped ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Supercapacitor Applications

Synthesis of Double-Walled Carbon Nanotubes by Floating Chemical Vapor Deposition Method in a Reactor with Varied Diameter

2013 ◽  
Vol 662 ◽  
pp. 3-6
Author(s):  
Chang Yu ◽  
Xiang Tong Meng ◽  
Lei Zhang ◽  
Jie Shan Qiu
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Electron Microscope ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Catalyst Precursor ◽  
Deposition Method ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Double-walled carbon nanotubes (DWCNTs) have been synthesized by a floating catalytic chemical vapor deposition method (FC-CVD) in diameter-varied reactor with xylene as carbon sources, ferrocene as catalyst precursor, and sulfur as additive. The as-grown products were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), and Raman spectrometer. The results show that DWCNTs with a high graphite degree is centimeter-scale in length, and the inner diameter varies in the range of 1.5-1.7 nm. The effect of reactor diameter on the structure and morphology of the products was also investigated and compared. It is believed that the diameter-varied reactor may become a feasible route to the mass and continuous production of DWCNTs.

Chirality control for predominant metallic or semiconducting single-walled carbon nanotubes prepared using a mild etchant

2019 ◽  
Vol 55 (92) ◽  
pp. 13888-13891 ◽  
Author(s):  
Sook Young Moon ◽  
Woo Sik Kim
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Walled Carbon Nanotubes ◽  
Chemical Vapor Deposition Method ◽  
Deposition Method ◽  
Chirality Control ◽  
Walled Carbon Nanotubes ◽  
Catalyst Chemical Vapor Deposition

Highly oriented metallic and semiconducting SWCNTs were synthesized with different carrier gas compositions and etchant amounts by the floating catalyst chemical vapor deposition method.

Stacking Nature of the Catalytic Chemical Vapor Deposition-Derived Double-Walled Carbon Nanotubes

2006 ◽  
Vol 6 (11) ◽  
pp. 3321-3324 ◽  
Author(s):  
Yoong-Ahm Kim ◽  
Hiroyuki Muramatsu ◽  
Masahito Kojima ◽  
Takuya Hayashi ◽  
Yutaka Kaburagi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Catalytic Chemical Vapor Deposition ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Here we described the synthesis of highly pure double walled carbon nanotube (DWNT) through a right combination of a catalytic chemical vapor deposition method and the two-step purification and evaluated their stacking infidelity when compared to multi-walled carbon nanotubes (MWNTs). Easy fabrication of thin and flexible, but mechanically tough DWNT-buckypaper was due to the long and large-sized bundled DWNT (up to 50 nm), where DWNTs with diameter below 2 nm were packed in hexagonal array. Through detailed transmission electron microscope, X-ray and Raman studies, we confirmed that the intershell spacing of our DWNT sample was ca. 0.36 nm, which was believed to strongly affect negative and small magnetoresistance absolute value of −0.09 at 77 K and 1 T.

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