One-pot preparation of highly fluorescent cadmium telluride/cadmium sulfide quantum dots under neutral-pH condition for biological applications

Zhu, Yian, Li, Zhen, Chen, Min, Cooper, Helen, Lu, Gao Qing (Max) and Xu, Zhi Ping (2013) One-pot preparation of highly fluorescent cadmium telluride/cadmium sulfide quantum dots under neutral-pH condition for biological applications. Journal of Colloid and Interface Science, 390 1: 3-10. doi:10.1016/j.jcis.2012.08.003


Author Zhu, Yian
Li, Zhen
Chen, Min
Cooper, Helen
Lu, Gao Qing (Max)
Xu, Zhi Ping
Title One-pot preparation of highly fluorescent cadmium telluride/cadmium sulfide quantum dots under neutral-pH condition for biological applications
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 1095-7103
0021-9797
Publication date 2013-01-15
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.jcis.2012.08.003
Volume 390
Issue 1
Start page 3
End page 10
Total pages 8
Place of publication Maryland Heights, MO, United States
Publisher Academic Press
Collection year 2013
Language eng
Abstract Water-soluble CdTe/CdS quantum dots (QDs) with tuneable emissions were prepared in aqueous solution at pH = 6–7 via refluxing and hydrothermal treatment. The resultant CdTe/CdS QDs are stabilized with mercaptosuccinic acid (MSA) and show high fluorescence quantum yields (maximum QY is 84%). Characterization with UV–Vis, PL, XPS, XRD and TEM demonstrates a core (CdTe)–shell (CdS) structure, which leads to high fluorescence quantum yields. The effective protection from CdS shell and MSA enables CdTe QDs to be chemically stable in a pH range of 6–9 and less toxic. These merits make our CdTe/CdS QDs very promising for bio-imaging applications, as exemplified by labelling HEK 293 cells.
Keyword Core–shell CdTe/CdS
Mercaptosuccinic acid
Quantum dots
Aqueous preparation
Neutral pH
Cellular imaging
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 2 October 2012

 
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Created: Fri, 07 Dec 2012, 10:51:49 EST by Debra McMurtrie on behalf of Queensland Brain Institute