| 摘要 |
PURPOSE: A nanoparticle having a multi-layered core-shell structure is provided to maintain color of paint by adding the nanoparticle having a multi-layered core-shell structure to the paint. CONSTITUTION: A nanoparticle having a multi-layered core-shell structure comprises a core and an insulation layer having a shell form which covers the core. In the insulator layer, first insulators and second insulators are laminated by turns. The refractive index of the first insulator is bigger than the refractive index of the second insulator. The core has a hollow shape. The insulator layer is composed of the odd-numbered double layers. The first insulator is composed of one of ITO, ATO, ITO+ATO, IATO, TiO2, Ta2O5, ZnO and ZrO2. The second insulator is composed of one of SiO2, SiN and Al2O3. The nanoparticle is manufactured by either a dry process or a wet method.
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