ANYL 112 |
| Quantum dots are an important class of nanomaterials with the potential for a variety of applications such as sensors and biological imaging. While CdSe quantum dots have been well developed other less toxic systems such as CdS and ZnS have not been extensively investigated. Our program in this area is focused on developing facile synthetic routes to CdS and ZnS core:shell quantum dots doped with magnetic nuclei such as Mn(II), Cu(II), and trivalent lanthanides. Our synthetic procedures have been developed in methanol and aqueous phases with any phosphate based stabilizers. We have investigated the synthesis of CdS core:shell quantum dots in the aqueous phase with SDS micelles in the presence of various magnetic metal ions. The procedure yields nanoparticles of about 3 nm with metal ions predominantly present on the surface of the nanoparticles. Developing a shell of CdS on these nanoparticles yields core;shell nanoparticles with the metal ions present in the CdS lattice. These nanoparticles have been characterized by uv-vis absorption, luminescence, and EPR spectroscopy. These studies will be presented. |
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General Session
7:00 PM-9:00 PM, Sunday, 26 March 2006 Georgia World Congress Center -- Ex. Hall B4, Poster
Sci-Mix
Division of Analytical Chemistry |