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Proceedings Paper

Synthesis and characterization of colloidal CdSexS1-x/ZnS quantum dots
Author(s): Mark V. Reymatias; Arjun Senthil; Dominic Bosomtwi; Shruti I. Gharde; Gema J. Alas; DeYannah J. Walker; Adreanna G. Rael; Nhi Nguyen; Nathan J. Withers; Sergei A. Ivanov; John Watt; Dale L. Huber; Marek Osiński
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Paper Abstract

CdSexS1-x/ZnS quantum dots (QDs) can cover a broader spectral range than the commonly used CdSe/ZnS QDs and are potentially useful as biomarkers for tagging cell lines such as HeLa, A549, and MCF-7 due to their high photoluminescence intensity and stability in solution. So far, there have been few studies of colloidal CdSexS1-x/ZnS QDs that would simultaneously investigate changes in a) the molar composition of QD cores, and b) the shell thickness, as well as the effects of these changes on the photoluminescence and quantum yield properties of the QDs. CdSeyS1-y QDs and CdSexS1-x/ZnS core/shell QDs were synthesized via a previously reported and modified hot-injection procedure and via a telescoping one-pot synthesis based on the modified hot-injection procedure. Size, morphology, composition, and colloidal stability of these QD core/shell systems is reported with data obtained from TEM, XRD, TGA, DSC, DLS, and zeta potential techniques. Optical characterization is described using data collected from UV-Vis absorption spectrophotometry and photoluminescence spectroscopy.

Paper Details

Date Published: 16 March 2020
PDF: 12 pages
Proc. SPIE 11255, Colloidal Nanoparticles for Biomedical Applications XV, 1125506 (16 March 2020); doi: 10.1117/12.2553001
Show Author Affiliations
Mark V. Reymatias, The Univ. of New Mexico (United States)
Arjun Senthil, The Univ. of New Mexico (United States)
Dominic Bosomtwi, The Univ. of New Mexico (United States)
Shruti I. Gharde, The Univ. of New Mexico (United States)
Gema J. Alas, The Univ. of New Mexico (United States)
DeYannah J. Walker, The Univ. of New Mexico (United States)
Adreanna G. Rael, The Univ. of New Mexico (United States)
Nhi Nguyen, 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)
John Watt, 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. 11255:
Colloidal Nanoparticles for Biomedical Applications XV
Marek Osiński; Antonios G. Kanaras, Editor(s)

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