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Electrostatic oscillations of conductive CNT bundles have been successfully demonstrated in air environment. Three unique characteristics have been observed and characterized. First, CNT bundles have been constructed by a simple “pick, stick and break” process using a regular probe tip from vertically aligned CNT forest on a silicon substrate. Second, CNT bundles have been actuated statically under...
Carbon nanotubes were synthesized directly on the alloy contained Fe and Ni surface coated by iron nano-powder catalyst from the V-type pyrolysis flame. Scanning electron microscope and transmission electron microscope were used to characterize the morphology and structure of carbon nanotubes. The results show that luxuriant carbon nanotubes with high yield and purity were fabricated on the alloy...
Bamboo-like carbon nanotubes were synthesized successfully from V-type pyrolysis flame. Carbon monoxide was employed as carbon source and pentacarbonyl iron was served as catalyst. The carbon nanotubes attached on the sampling probe were characterized by scanning electron microscope and transmission electron microscope. The results show that the size of catalyst particle is approximate linear relationship...
Synthesis carbon nanotubes from V-type pyrolysis flame is a kind of novel technique. It has potential for utilization in mass production. This study aims to examine formation conditions for various carbon nanotubes in pyrolysis flame and to characterize their morphology and structure. Carbon monoxide is as carbon source and the acetylene/air premixed gas provides heat by combustion. Pentacarbonyl...
Synthesis carbon nanotubes and iron nanofibers from V-type pyrolysis flame is a kind of novel technique. It has potential for utilization in mass production. This study aims to examine conditions for carbon nanotubes and iron nanofibers formation in pyrolysis flame and to characterize its morphology and structure. Pentacarbonyl iron was selected to serve as catalyst precursor. Carbon nanotubes with...
Synthesis carbon nanotubes from V-type pyrolysis flame is a kind of novel technique. It has potential for utilization in mass production. Carbon monoxide is as carbon source and the acetylene/air premixed gas provides heat by combustion. Hydrogen gas is served as reducing agent and dilution gas. One part of helium gas is as dilution and protection gas, the other part of helium gas carries the catalyst...
The zinc oxide (ZnO) nanostructure grown onto the carbon nanotube (CNT) surface could enhance the CNT FE characteristics. However, the ZnO nanostructure morphology is an important parameter to decide the FE enhancement. This study used thermal chemical vapor deposition (TCVD) to form ZnO nanostructure onto CNT bundle surface, and adjust the distance (D) between the CNT bundle and the zinc acetate...
A new carbon nanotube-based antenna for terahertz application is proposed. The wave velocity and propagation constant of single-walled carbon nanotube bundle dipole antenna is analyzed based on the compact equivalent circuit model of single walled carbon nanotube bundle. The results show that the slower wave velocity of a bundle antenna means that a nanotube bundle is shorter than a nanotube dipole...
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