Syntheses and Optical Characterizations of ZnS:Mn Nanocrystals Capped by Polyethylene Oxide Molecules of Varying Molecular Weights

Abstract

They are expected to replace complicated or hazard ous radioactive detection, and have formed the basis of very sensitive biological assays. In addition, semiconducting nanocrystals are much more efficient, sensitive and stable than the organic dyes currently used. Un-fortunately, most highly luminescent semiconductor nanocry-stals are grown in non-polar media, making them largely in-compatible with any biological system. To date, there are several reports of solubilized hydrophobic nanocrystals in water, created by modifying the crystals’ surfaces;