Synthesis of Silica‐Coated Semiconductor and Magnetic Quantum Dots and Their Use in the Imaging of Live Cells

Bifunctional nanocomposites comprising semiconductor and magnetic nanoparticles are of interest in biological applications for biolabeling, bioimaging, and cell separation. To this end, a nanocomposite system that consists of Fe2O3 magnetic nanoparticles and CdSe quantum dots and which exhibits superparamagnetism and tunable emission properties was prepared and used to label different live cell membranes (see picture). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z604245_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.