Quantum dots (QDs) are nano-scale semiconductor particles on the order of 2-10 nm in diameter. They possess electrical properties between those of bulk semi-conductors and particular person molecules, in addition to optical characteristics that make them appropriate for functions the place fluorescence is desirable, comparable to medical imaging. Most QDs synthesized for medical imaging are in the type of CdSe(ZnS) core(shell) particles. CdSe QDs have been shown to own optical properties superior to organic dyes. Despite their potential for use as distinction agents for medical imaging methods, their use in vivo is hindered by the cytotoxicity of cadmium. To handle
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