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Proceedings Paper

Synthesis and exploitation of InP/ZnS quantum dots for bioimaging
Author(s): Salam Massadeh; Shu Xu; Thomas Nann
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Paper Abstract

Nano- and cytotoxicity becomes increasingly more important with an increasing number of potential bio-medical applications for semiconductor Quantum Dots (QDs). Therefore, the frequently used CdSe-based QDs are unsuitable per-se, since cadmium is a highly toxic heavy metal and may leach out of QDs. Cadmium-free QDs have not been available for a long time, because the synthesis of e.g. monodisperes and highly crystalline InP QDs caused many problems. We report on the synthesis of InP/ZnS QDs with optical properties similar to those displayed by typical CdSe/ZnS QDs. A major break-through has been reached by addition of zinc ions into the reaction mixture. Furthermore, the transfer of the InP/ZnS QDs to water and their exploitation for bioanalytical applications are reported. It is shown that InP/ZnS QDs can be used to replace CdSe-based ones for almost any bio-medical application.

Paper Details

Date Published: 13 February 2009
PDF: 11 pages
Proc. SPIE 7189, Colloidal Quantum Dots for Biomedical Applications IV, 718902 (13 February 2009); doi: 10.1117/12.816892
Show Author Affiliations
Salam Massadeh, Univ. of East Anglia (United Kingdom)
Shu Xu, Univ. of East Anglia (United Kingdom)
Thomas Nann, Univ. of East Anglia (United Kingdom)


Published in SPIE Proceedings Vol. 7189:
Colloidal Quantum Dots for Biomedical Applications IV
Marek Osinski; Thomas M. Jovin; Kenji Yamamoto, Editor(s)

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