INOR 656 |
| Quantum dots (QDs) are a new class of promising fluorescent probes for many biological and biomedical applications due to their inherent advantages over conventional dyes. This work focuses on the synthesis and characterization of CdxTeyZnz/ZnS quantum dots for the development of new drug delivery systems. We have designed a one-pot synthesis leading to CdxTeyZnz/ZnS core-shell quantum dots with photoluminescence in the far-red and near-infrared region of the spectrum. Additionally, we have studied different solvent systems, reaction conditions and reaction sequences leading to differently shaped, sized and composed CdxTeyZnz/ZnS semiconductor nanocrystals. Apparently, the solvent systems play an important role for the shape control of the crystals, whereas the reaction conditions determine the photoluminescence properties of the obtained quantum dots. Different reaction sequences lead to differently composed quantum dots. The nanocrystals were investigated in terms of size and shape (PCS and TEM), luminescent properties (Fluorescence spectra), crystallinity and elemental composition (ICP-OES). |
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Nanoscience: Synthesis and Characterization
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Inorganic Chemistry |