Metallic nanocrystals formation from metal-oxide nanocrystals via evaporation process

Metal or metal-oxide nanocrystals can be formed by the gas deposition metho d. Here we report a modified.-as deposition method, by which nanocrystals o f metal oxides are synthesized at first, and transformed into metal nanocry stals by heating the carrying gas. By controlling the heating temperature w e can selectively deposit either dielectric films or conductive films in th e same deposition process. Demonstrative experiments for transforming Al2O3 nanocrystals into At nanocrystals are shown.