| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light weight playing implement with excellent durability provided with a multi-functional material functioning as a photocatalyst. <P>SOLUTION: A toy 1 for small children uses the multi-functional material, provided with a substrate on at least part of a constitution member, in which at least part of a surface layer of the substrate comprises titanium oxide or oxidized titanium alloy, and a carbon doped titanium oxide surface layer in which carbon is doped in the state of Ti-C bond is formed on at least part of the surface layer. Alternatively, it uses the multi-functional material in which at least part of the surface layer of the substrate comprises titanium oxide or the titanium ally oxide, a layer in which a large number of fine columns comprising titanium oxide or the oxidized titanium alloy stand is exposed to at least part of the surface layer and the fine columns are carbon-doped. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
