Assembly of Supra Nanoclusters within Crystalline and Amorphous 3-D Surfaces

摘要

The use of a three dimensional crystalline superlattice as a host for clustersynthesis adds several important dimensions to the design of semiconductor quantum confined structures. Cluster geometry and size distribution are controlled by the topography of the three dimensional host surface, making it possible to create semiconductor quantum superlattices. Novel, normally very unstable, nanosized clusters can be synthesized via encapsulation and coordination to the host framework. The use of large three dimensional surface areas permits studies of cluster interactions over a wide range of concentrations and at relatively high optical densities. Cluster electronic properties can be altered by varying the dielectric and charge properties of the nanoporous host. In addition to single crystals, the porous glasses add new possibilities for following the chemistry involved in forming small semiconductor particles, as well as determining their photophysical properties.