scholarly journals Fe/Co Alloys for the Catalytic Chemical Vapor Deposition Synthesis of Single- and Double-Walled Carbon Nanotubes (CNTs). 1. The CNT−Fe/Co−MgO System

2005 ◽  
Vol 109 (38) ◽  
pp. 17813-17824 ◽  
Author(s):  
Pierre Coquay ◽  
Alain Peigney ◽  
Eddy De Grave ◽  
Emmanuel Flahaut ◽  
Robert E. Vandenberghe ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Catalytic Chemical Vapor Deposition ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Co Alloys

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.

The confined growth of double-walled carbon nanotubes in porous catalysts by chemical vapor deposition

Carbon ◽  
2008 ◽  
Vol 46 (14) ◽  
pp. 1860-1868 ◽  
Author(s):  
Yi Liu ◽  
Wei-zhong Qian ◽  
Qiang Zhang ◽  
Guo-qing Ning ◽  
Qian Wen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Porous Catalysts ◽  
Confined Growth ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

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.

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