A carbon nanotube manufacturing method is provided. In the carbon nanotube manufacturing method, carbon nanoparticles are dispersed in a strong acid solution and heated at a predetermined temperature under reflux to form carbon nanotubes from the carbon nanoparticles. The carbon nanotubes can be simply produced on a mass-scale at low costs by using the strong acid solution.

 
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< Polarizing electrode for electric double layer capacitor and electric double layer capacitor therewith

> Methods and systems for selectively separating CO.sub.2 from a multicomponent gaseous stream to produce a high pressure CO.sub.2 product

> Gemini surfactants and methods for preparing mesoporous materials using the same
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