“…Various techniques have been developed to prepare metal oxide nanoparticles, such as gas-phase chemical reaction, spray pyrolysis, vapor deposition, microwave plasma synthesis, and sol-gel methods (Zhang and Cao, 2003;Chen, 2003;Cao and Deng, 1996;Zheng et al, 2001;Cui et al, 2000). The arc discharge plasma method is a mature and advanced materials processing technique, which has successfully been applied for the production of metal nanoparticles (Ioan, 1999;Wei et al, 2005;Zhiqiang et al, 2006;Hsieh et al, 2006). Chazelas proposed a transferred arc system to produce nanometric particles from the condensation of metallic vapours obtained by controlling the evaporation of the anode material.…”