The Aligned Carbon Microcoils Having the Straight Type Overall Geometry

2016 ◽  
Vol 689 ◽  
pp. 43-47
Author(s):  
Gi Hwan Kang ◽  
Sung Hoon Kim
Keyword(s):  
Chemical Vapor Deposition ◽  
Crystal Structures ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Regular Structure ◽  
Growth Mode ◽  
Thermal Chemical Vapor Deposition

The aligned carbon microcoils having the straight type overall geometry could be obtained using C2H2/H2 as source gases and SF6 as an incorporated additive gas under the thermal chemical vapor deposition system. Their morphologies and crystal structures were investigated and compared with the randomly grown carbon microcoils having the coil or twist type overall geometry. We could observe the enhancement of the (002) peak in XRD spectra of the aligned carbon microcoils indicating the existence of the more regular structure in the aligned carbon microcoils. The aligned carbon microcoils were formed as a bundle shape, while the randomly grown carbon microcoils were appeared as an individual shape. The systematic growth mode for the developing aspect of the aligned carbon microcoils was proposed.

scholarly journals Gas Phase Chemistry of Trimethylboron in Thermal Chemical Vapor Deposition

2017 ◽  
Vol 121 (47) ◽  
pp. 26465-26471 ◽  
Author(s):  
Mewlude Imam ◽  
Laurent Souqui ◽  
Jan Herritsch ◽  
Andreas Stegmüller ◽  
Carina Höglund ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Gas Phase ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Thermal Chemical Vapor Deposition ◽  
Gas Phase Chemistry ◽  
Phase Chemistry

Structure Controlled Synthesis of Vertically Aligned Carbon Nanotubes Using Thermal Chemical Vapor Deposition Process

2010 ◽  
Vol 133 (3) ◽  
Author(s):  
Myung Gwan Hahm ◽  
Young-Kyun Kwon ◽  
Ahmed Busnaina ◽  
Yung Joon Jung
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Large Scale ◽  
Chemical Vapor ◽  
Controlled Synthesis ◽  
Full Potential ◽  
Thermal Chemical Vapor Deposition ◽  
Vertically Aligned ◽  
Walled Carbon Nanotubes

Due to their unique one-dimensional nanostructure along with excellent mechanical, electrical, and optical properties, carbon nanotubes (CNTs) become a promising material for diverse nanotechnology applications. However, large-scale and structure controlled synthesis of CNTs still have many difficulties due to the lack of understanding of the fundamental growth mechanism of CNTs, as well as the difficulty of controlling atomic-scale physical and chemical reactions during the nanotube growth process. Especially, controlling the number of graphene wall, diameter, and chirality of CNTs are the most important issues that need to be solved to harness the full potential of CNTs. Here we report the large-scale selective synthesis of vertically aligned single walled carbon nanotubes (SWNTs) and double walled carbon nanotubes (DWNTs) by controlling the size of catalyst nanoparticles in the highly effective oxygen assisted thermal chemical vapor deposition (CVD) process. We also demonstrate a simple but powerful strategy for synthesizing ultrahigh density and diameter selected vertically aligned SWNTs through the precise control of carbon flow during a thermal CVD process.

Rapid thermal chemical vapor deposition of in-situ boron doped polycrystalline SIxGe1-x

1992 ◽  
Vol 21 (1) ◽  
pp. 61-64 ◽  
Author(s):  
M. Sanganeria ◽  
D. T. Grider ◽  
M. C. öztürk ◽  
J. J. Wortman
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Thermal Chemical Vapor Deposition ◽  
Boron Doped
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