Technology Innovation in the Nanoparticle Project

Abstract

The five-year METI/NEDO’s nanoparticle project started in 2001. In this study, various nano-sized particles, e.g. Au, Ag, GaN, ZnO, FePt, CdSe, Y2O3:Eu, (Y,Gd)3Al5O12:Ce, ZnS:Mn, etc., were prepared by gas-phase methods (thermal and plasma CVD) and by liquid-phase methods (spray pyrolysis, spray drying as well as sol-gel method) using continuous reactors. Nanoparticles and nanoparticle/polymer composite materials were also prepared using polymeric precursor/processing techniques. Using these preparation methods, non-agglomerated and highly-functional nanoparticles were successfully produced in controlled sizes ranging from around 100 nm to a single nanometer with good stoichiometry and high crystallinity.† This paper, appeared originally in Japanese in the 72nd Annual Meeting of the Society of Chemical Engineers, Japan, Session ID: K120 (Kyoto, 2007), is published in KONA Powder and Particle Journal with the permission of the editorial committee of the Society of Chemical Engineers, Japan.

Keywords

• nanoparticles
• nanocomposites
• cvd
• spray pyrolysis
• sol-gel