| abstract |
The present invention relates to a photochromic nanocapsule and its preparation method thereof, and more particularly, to a core/shell type photochromic nanocapsule comprising a photochromic diarylethene compound encompassed by polymers and its preparation method thereof, wherein a diarylethene compound, a monomer or a mixture of monomers, an emulsifier and a initiator are emulsified followed by the polymerization at a predetermined temperature thus resulting in a photochromic nanocapsule which is not only reduced in size from μm of the conventional ones to nm but also has an excellent thermal stability, transparency, and an excellent photochromic property thereby enabling to be used as optical materials such as an optical recording material, an optical switch, and the like. |