A New Luminescent Organic–Inorganic Hybrid Compound with Large Optical Nonlinearity

✍ Scribed by A. M. Guloy; Z. Tang; P. B. Miranda; V. I. Srdanov

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 182 KB
• Volume: 13
• Category: Article
• ISSN: 0935-9648
• DOI: 10.1002/1521-4095(200106)13:11<833::aid-adma833>3.0.co;2-t

✦ Synopsis

When the power density of the plasma is increased by either using smaller (3 mm diameter) electrodes or by side-to-side arcing, the amount of carbon soots collected from the aqueous solution vs. the weight loss of electrodes can be up to 50 % in the AC process. The yields of carbon nanotubes and nanoparticles in the as-produced soots are described in the text.

In the metal filling experiments, 0.1 M CoSO 4 aqueous solution was used and a DC mode was adapted. After arcing, the carbon soots in both aqueous phase and cathode deposits were collected and ground into fine particles. Metal encapsulated nanoparticles and nanotubes were purified a few times by mixing the soots with aqueous surfactant solutions, then passing the solution through a column with magnets outside. In this way, amorphous carbons, unfilled nanoparticles, and nanotubes can be removed from the metal filled, magnetic CNTs and particles. The magnetic carbon soots were further treated by a 1.0 M HNO 3 solution for 1 h to remove all free metal particles.