Advanced Materials

A Multidye Nanostructured Material for Optical Data Storage and Security Data Encryption


  • The financial support of the Canada Research Chair Fund (NSERC Canada) and Premier Research Excellence Award is acknowledged with gratitude. We also wish to thank Prof. M. A. Winnik for useful discussions and Battista Calvieri and Steven Doyle for some of the bleaching experiments.


A new class of materials for optical data storage and security data encryption is reported. Multidye colloid particles comprising different dyes in different phases are employed as the building blocks to produce a multicolored multiphase polymeric material. The incorporation of dyes in different phases minimizes energy transfer, provides selective dye photobleaching, and allows storage of different data on a single spot (see Figure and also cover).