New nanocrystal assemblies for biological detection


A. Paul Alivisatos,, Depart. of Chemistry, University of California, Berkeley, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
This talk will focus on two recent projects relating to applications of nanocrystals in biological imaging. The first concerns the use of discrete groups of nanocrystals as novel biological labels. For example, colloidal quantum dot emission can be altered by the placement nearby of Au nanocrystals. Similarly, the distance between two Au nanocrystals can be probed at the single molecule level by light scattering. This allows for the creation of a new spectroscopic ruler based on light scattering.