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4 September 2008 Simple silanization routes of CdSe and CdTe nanocrystals for biological applications
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Semiconductor colloidal quantum dots have been, for the past two decades, incorporated in a wide range of applications from catalysis and optical sensors to biolabels. For this reason, simple, cheap and reproducible routes of synthesis are the main goal of many research groups around the world. They seek the production of a very stable and extremely quantum efficient nanocrystal that can afford rough changes in the external environment. Silica capping is becoming a very common tool in the quest for a stable quantum dot, because of its strong and stable structure, this material provides a great insulator to the nanocrystal from the outside. The nanocrystal surface is not chemically favorable to the deposition of the bare silica shell, what demands a bifunctional molecule that provides the linkage between the core and the shell. In this work we present a comparison between several silanization methods of thiol capped CdSe and CdTe quantum dots, showing some simplifications of the routes and an application of the quantum dots produced as fluorescent cell markers in acquisition of confocal microscopy images.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Diogo B. Almeida, Wagner M. Faustino, Gilberto J. Jacob, André A. de Thomaz, Luiz C. Barbosa, Oswaldo L. Alves, Patricia M. A. Farias, Beate S. Santos, Adriana Fontes, Suzete A. O. Gomes, Denise Feder, Italo O. Mazali, and Carlos L. Cesar "Simple silanization routes of CdSe and CdTe nanocrystals for biological applications", Proc. SPIE 7030, Nanophotonic Materials V, 70300I (4 September 2008);

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