Growth dynamics of single-wall carbon nanotubes synthesized by CO2 laser

Article Abstract:

Single-wall carbon nanotubes (SWNTs) were produced through the irradiation of a 20-ms CO2 laser pulse onto a graphite-Co/Ni composite target at 25-1200 degrees C. Characterization of carbonaceous deposits revealed that SWNTs were formed by laser irradiation even at room temperature. It is proposed that the growth of the SWNT occurs from a liquid-like carbon-metal particle through supersaturation and segregation. A continuous supply of hot carbon clusters to the particles due to the 20-ms laser pulse and the maintenance of the hot growth zone for the SWNTs have a significant role in the SWNT formation.

Usage, Carbon, Carbon dioxide lasers

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Synthesis of Cu nanoparticles and microsized fibers by using carbon nanotubes as a template

Article Abstract:

A study was conducted to analyze the electronic structure of copper nanoparticles, copper fibers and polycrystalline copper metal. Copper samples were dispersed in water and subjected to ultrasonic treatment. Results indicated a negative core-level binding energy shift for copper nanoparticles. There was also an increase in work function for copper fibers as compared with those of the polycrystalline copper.

Copper

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