Abstract
Recent results on the growth of ultrafine particles due to the advanced gas evaporation method and characteristic of ultrafine particles are shown. An outline for the growth of ultrafine particles is first presented. A typical example of gas pressure effect is shown on the formation of Fe, FeO, and Fe_3O_4 particles due to evaporation of FeO powder. A new experimental method of produce oxide particle by using the heat of exothermic in gas flow is shown. The growth mechanism of tubular crystal showed the liquid state in the smoke. Oxidation and reduction process of Cu particle, and the growth process by using ultrafine particle and dilm are shown.
