ABSTRACT
This chapter describes nanoparticles and submicron-sized particles. It provides an overview on the preparation of ultrafine particles by chemical vapour deposition (CVD) technologies in various formats, instead of solely bulk powder synthesis that is most frequently the main focus of previous reviews. The chapter is concerned with gas-phase synthesis methods, in particular, CVD-based methods for the synthesis of ultrafine particles with high purity. In perspective, there has been considerable research in developing a variety of processes for the preparation of ultrafine particles, including liquid processes, such as wet chemical process and sol-gel process. The collection of ultrafine particles depends on CVD processes. Although ultrafine particles, such as carbon black and colloidal gold, were reported to be used since ancient times, it was only in the twentieth century that the research field for further studies has emerged. Chemical vapour reaction, chemical vapour condensation, and chemical vapour precipitation are synonyms used frequently in the literature as chemical vapour synthesis.
