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Chemical Vapor Deposition

From Cheap Tubes, Inc.

Chemical vapor deposition (CVD) of hydrocarbons over a metal catalyst is a classical method that has been used to produce various carbon materials such as carbon fibers, filaments, etc. for over twenty years. Large amounts of CNTs can be formed by catalytic CVD of acetylene over Co and Fe catalysts supported on silica or zeolite. The carbon deposition activity seems to relate to the cobalt content of the catalyst, whereas the CNTs' selectivity seems to be a function of the pH in catalyst preparation. Fullerenes and bundles of SWNTs were also found among the MWNTs produced on the carbon/zeolite catalyst.
Producing CNTs via Catalyzed Chemical Vapor Deposition enables companies to produce CNTs in much larger volumes and subsequently sell them for lower prices.

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CheapTubes.com is "The Source for Short Carbon Nanotubes"! Our Short Carbon Nanotubes (CNTs) are CCVD grown and acid purified. Additionally they are shortened using air milling to a length of... (read more)
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Cheap Tubes is The Source for OH & COOH Functionalized Nanotubes"! Our SWNTs and MWNTs are available with either Hydroxyl (OH) or Carboxyl (COOH) functional groups bonded to the ends and sidewalls... (read more)
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For chemical vapor deposition (CVD) and atomic layer deposition (ALD) precursors, Arkalon Chemical Technologies, LLC offers electro-polished stainless steel bubblers. (read more)
Cheap Tubes, Inc. - High Purity Multi Walled Carbon Nanotubes - MWNTs
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Specially manufactured, Tulsion® cation exchange resins in the Hydrogen form as well as anion exchange resins in the Hydroxyl form can be used as catalysts. The former are used as catalyst for... (read more)
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Topics of Interest

References (3.1) A. Moisala, A. G. Nasibulin and E. I. Kauppinen, The role of metal nanoparticles in the catalytic production of single-walled carbon nanotubes a review , J. Phys. Cond. Matter, 15,...

"The carbon arc discharge method, initially used for producing C60 fullerenes, is one of the most common and perhaps easiest way to produce CNTs, as it is rather simple. However, it is a technique...

Wenping Ma, Edwin L. Kugler, and Dady B. Dadyburjor Department of Chemical Engineering, West Virginia University, Morgantown, WV 26506-6102 1. Abstract The effects of Mo loading and type of...

"Purification of CNTs generally refers to the separation of CNTs from other entities, such as carbon nanoparticles, amorphous carbon, residual catalyst, and other unwanted species. The classical...

Attempts to introduce foreign materials into the empty central cavities of carbon nanotubes began soon after the appearance of Iijima s paper in 1991. This work was driven partly by curiosity the...