Quantum dots with silica shells

摘要

The present paper introduces to the problems related with the application of silica shells to luminescent semiconductornanocrystals, especially for bioanalytical applications. Two examples for the preparation of silica shellsare presented: First, preparation of a very thin silica layer with simultaneous functionalisation and biologicalapplication. Second, a new preparation method for silica shells based on a sol-gel approach. In summary, it isshown, that — despite of all problems — high-quality silica coated nanocrystals can be prepared and are wellsuited for bioanalytical applications.