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Proceedings Paper

Synthesis and characterization of colloidal ZnTe/ZnS quantum dots
Author(s): Gavin P. Gonzales; Arjun Senthil; Gema J. Alas; Nathan J. Withers; Sergei A. Ivanov; Dale L. Huber; Marek Osiński
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Paper Abstract

Colloidal quantum dots (QDs) emitting in the visible spectrum are of interest for many biomedical applications, including bioimaging, biosensing, drug delivery, and photodynamic therapy. However, a significant limitation is that QDs typically contain cadmium, which is highly cytotoxic and makes prospects for their FDA approval for human treatment very unlikely. Previous work on biocompatible QDs has focused on indium phosphide and zinc oxide as alternative materials for QDs. However, these nanoparticles have also been shown to be cytotoxic. High-efficiency luminescent ZnTe-based QDs could be a reasonable alternative to Cd-containing QDs. We started our recent studies of ZnTe core, zinc chalcogenide shell QDs with synthesis, structural characterization, and investigation of optical properties of ZnTe/ZnSe colloidal QDs that displayed a blue-green photoluminescence under UV excitation. In this paper, the characteristics of ZnTe/ZnS QDs are compared to those of ZnTe/ZnSe QDs. We conclude that ZnTe/ZnS QDs are appealing candidates for various biomedical applications instead of the currently prominent alternative: cadmium-chalcogenide core QDs.

Paper Details

Date Published: 7 March 2019
PDF: 9 pages
Proc. SPIE 10892, Colloidal Nanoparticles for Biomedical Applications XIV, 1089206 (7 March 2019); doi: 10.1117/12.2515646
Show Author Affiliations
Gavin P. Gonzales, The Univ. of New Mexico (United States)
Arjun Senthil, The Univ. of New Mexico (United States)
Gema J. Alas, The Univ. of New Mexico (United States)
Nathan J. Withers, The Univ. of New Mexico (United States)
Sergei A. Ivanov, Los Alamos National Lab. (United States)
Dale L. Huber, Sandia National Labs. (United States)
Marek Osiński, The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 10892:
Colloidal Nanoparticles for Biomedical Applications XIV
Marek Osiński; Wolfgang J. Parak, Editor(s)

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