Large-scale synthesis of single-wall carbon nanotubes by catalytic chemical vapor deposition (CCVD) method
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چکیده
منابع مشابه
Large-Scale Synthesis of Rings of Bundled Single-Walled Carbon Nanotubes by Floating Chemical Vapor Deposition
Since their discovery, single-walled carbon nanotubes (SWNTs) have attracted considerable attention due to their unique chemical and physical properties, as well as their promise in the area of materials chemistry. Using previously reported synthetic methods, carbon nanotubes (CNTs) are always grown as long strings, and this string shape largely determines their properties. CNTs with annular ge...
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We report surface-bound growth of single-wall carbon nanotubes (SWNTs) at temperatures as low as 350 degrees C by catalytic chemical vapor deposition from undiluted C2H2. NH3 or H2 exposure critically facilitates the nanostructuring and activation of sub-nanometer Fe and Al/Fe/Al multilayer catalyst films prior to growth, enabling the SWNT nucleation at lower temperatures. We suggest that carbo...
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Here, we have synthesized vertically aligned carbon nanotubes (VA-CNTs), using chemical vapor deposition (CVD) method. Cobalt and ethanol are used as the catalyst and the carbon source, respectively. The effects of ethanol flow rate, thickness of Co catalyst film, and growth time on the properties of the carbon nanotube growth are investigated. The results show that the flow rate of ethanol and...
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Direct synthesis of single-walled carbon nanotubes SWNTs bridging prepatterned Mo electrodes has been achieved using laser-assisted chemical vapor deposition LCVD . The synthesized SWNTs are found predominantly semiconducting. By controlling the spot size of the focused laser beam, synthesis of SWNTs can be achieved in a localized manner, which is governed by the thermal and optical properties ...
متن کاملSynthesis of Single- and Double-Wall Carbon Nanotubes by Gas Flow-Modified Catalyst-Supported Chemical Vapor Deposition
The synthesis of singleand double-wall carbon nanotubes by gas flow-modified, catalyst-supported chemical vapor deposition (CCVD) is reported. We have investigated the gas flow condition dependence on the synthesis of carbon nanotubes (CNTs) by placing blocks in the CCVD reactor. Carbon nanotubes having large diameters are preferentially grown under turbulent flow conditions. This indicates tha...
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ژورنال
عنوان ژورنال: Chemical Physics Letters
سال: 2000
ISSN: 0009-2614
DOI: 10.1016/s0009-2614(99)01338-x