Metal catalyst-free mist flow chemical vapor deposition growth of single-wall carbon nanotubes using C60 colloidal solutions

Carbon ◽  
2014 ◽  
Vol 68 ◽  
pp. 80-86 ◽  
Author(s):  
Yun Sun ◽  
Ryo Kitaura ◽  
Jinying Zhang ◽  
Yasumitsu Miyata ◽  
Hisanori Shinohara
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Wall Carbon Nanotubes ◽  
Metal Catalyst ◽  
Colloidal Solutions ◽  
Chemical Vapor Deposition Growth ◽  
Single Wall Carbon ◽  
Mist Flow

Interdependency of Gas Phase Intermediates and Chemical Vapor Deposition Growth of Single Wall Carbon Nanotubes

2010 ◽  
Vol 22 (22) ◽  
pp. 6035-6043 ◽  
Author(s):  
Bikau Skukla ◽  
Takeshi Saito ◽  
Shigekazu Ohmori ◽  
Mitsuo Koshi ◽  
Motoo Yumura ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Gas Phase ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Wall Carbon Nanotubes ◽  
Chemical Vapor Deposition Growth ◽  
Single Wall Carbon

Mist Flow Chemical Vapor Deposition Growth of Thin Single-Wall Carbon Nanotubes Using Fe18 Clusters as the Catalyst Precursor

NANO ◽  
2015 ◽  
Vol 10 (03) ◽  
pp. 1550042
Author(s):  
Yun Sun ◽  
Takuya Nakayama
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Diameter Distribution ◽  
Single Wall Carbon Nanotubes ◽  
Catalyst Precursor ◽  
Chemical Vapor Deposition Growth ◽  
Mist Flow ◽  
Walled Carbon Nanotubes

An investigation about the fabrication of thin single-walled carbon nanotubes (SWCNTs) using Fe 18 clusters as the catalyst precursor by means of mist flow chemical vapor deposition (CVD) has been carried out. The advantage of Fe 18 clusters is the uniform and small particle size. As a result, choosing the acetonitrile (MeCN), the original solvent for preparing Fe 18 clusters, as the carbon source can lead to the mean diameter of as-grown SWCNTs around 0.81 nm and thinner than some published results (zeolite-supported CVD and HiPco). In addition, according to the measured diameter distribution of as-grown SWCNTs, we are aware that thin SWCNTs less than 1.0 nm are dominant within the as-grown products corresponding to photoluminescence (PL) map indicating that mist flow CVD could be another option for the fabrication of thin SWCNTs in a floating CVD system and beneficial for the application of SWCNTs and development of CNT-based semiconducting electronic devices.

CONTROLLABLE CHEMICAL VAPOR DEPOSITION SYNTHESIS OF SINGLE-WALL CARBON NANOTUBES USING MIST FLOW METHOD

NANO ◽  
2012 ◽  
Vol 07 (06) ◽  
pp. 1250045 ◽  
Author(s):  
YUN SUN ◽  
RYO KITAURA ◽  
TAKUYA NAKAYAMA ◽  
YASUMITSU MIYATA ◽  
HISANORI SHINOHARA
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Wall Carbon Nanotubes ◽  
Flow Method ◽  
Mist Flow ◽  
Mean Diameter ◽  
The Mean

The influences of synthesis parameters on the mean diameter and diameter distribution of as-grown single-wall carbon nanotubes (SWCNTs) with chemical vapor deposition (CVD) using the mist flow method have been investigated in detail with Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). We found that CVD reaction temperature and flow rate play an essential role in controlling the mean diameter and the quality of as-grown SWCNTs. Furthermore, we found that the carbon supply kinetics can be a dominant factor to determine the diameter of as-grown SWCNTs in the present mist flow method. Under a different combination of various parameters, the mean diameter of SWCNTs can be varied from 0.9 nm to 1.5 nm controllably.

Purification of Single-Wall Carbon Nanotubes Synthesized from Alcohol by Catalytic Chemical Vapor Deposition

2004 ◽  
Vol 43 (No. 3B) ◽  
pp. L396-L398 ◽  
Author(s):  
Shingo Okubo ◽  
Takeshi Sekine ◽  
Shinzo Suzuki ◽  
Yohji Achiba ◽  
Kazuhito Tsukagoshi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Catalytic Chemical Vapor Deposition

scholarly journals Single wall carbon nanotubes growth over cobalt-iron mesoporous MCM-41 bimetallic catalyst under methane chemical vapor deposition, an experimental and DFT evaluation

2020 ◽  
Vol 25 (2) ◽  
pp. 227-246
Author(s):  
Frank Ramírez-Rodríguez ◽  
Betty López
Keyword(s):  
Activation Energy ◽  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Density Functional ◽  
Chemical Vapor ◽  
Photon Absorption ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Mcm 41

Cobalt and iron MCM-41 catalysts were synthesized through an in-situ incorporation process starting from commercial iron and cobalt nitrates. The incorporation was confirmed by diffuse reflectance UV spectroscopy (DRS-UV) inspecting the cobalt and iron silicate-like photon absorption features and comparing with pure MCM-41-Co and MCM-41-Fe catalysts. Additionally it was found that the incorporation of cobalt and iron does not compromise the mesoporous structure of MCM-41 as confirmed by N2 adsorption isotherms. All catalysts showed high surface areas (∼1100 m2g−1). Catalysts performance was conducted in a simple methane chemical vapor deposition (CVD) set up at 800 °C to produce single wall carbon nanotubes (SWCNT) under a constant flow of methane for 30 min. CVD products were characterized by thermogravimetric analysis (TGA) and Raman spectroscopy, finding that the iron content in the catalysts favors the selectivity and yield of graphitic-like structures, and confirming the presence of SWCNT by the appearance of a characteristic radial breathing mode (RBM) signals. These results were supported by Density Functional Theory (DFT) simulations of the methane dissociation (CH4 +TM → H3C –TMH) over Con (n = 1–5) and ComFe (m = 1–4), finding a different activation energy trend where ComFe (m = 1–4) clusters have the lower activation energy. The DFT study also revealed a charge difference (δC − δTM) higher in the case of dissociation over ComFe (m = 1–4) which may lead to an electrostatic stabilization of the transition metal, diminishing the activation energy of those clusters and leading to a faster carbon uptake.

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