Preparation of water-soluble CdTe/CdS core/shell quantum dots with enhanced photostability

Hui Peng; Lijuan Zhang; Christian Soeller; Jadranka Travas-Sejdic

doi:10.1016/j.jlumin.2007.04.007

Preparation of water-soluble CdTe/CdS core/shell quantum dots with enhanced photostability

Hui Peng^*
, Lijuan Zhang
, Christian Soeller
, Jadranka Travas-Sejdic

^*Corresponding author for this work

The University of Auckland

Research output: Contribution to journal › Article › peer-review

132 Scopus citations

Abstract

CdTe/CdS core/shell quantum dots (QDs) have been synthesized in an aqueous phase using thioacetamide as a sulfur source. The quantum yield was greatly enhanced by the epitaxial growth of a CdS shell, which was confirmed by X-ray photoelectron spectroscopy (XPS) results. The quantum yield of as-prepared CdTe/CdS core/shell QDs without any post-preparative processing reached 58%. The experimental results illustrate that the QDs with core/shell structure show better photostability than thioglycolic acid (TGA)-capped CdTe QDs. The cyclic voltammograms reveal higher oxidation potentials for CdTe/CdS core/shell QDs than for TGA-capped CdTe QDs, which explains the superior photostability of QDs with a core/shell structure. This enhanced photostability makes these QDs with core/shell structure more suitable for bio-labeling and imaging.

Original language	English
Pages (from-to)	721-726
Number of pages	6
Journal	Journal of Luminescence
Volume	127
Issue number	2
DOIs	https://doi.org/10.1016/j.jlumin.2007.04.007
State	Published - Dec 2007
Externally published	Yes

Keywords

Aqueous synthesis
CdTe/CdS
Core/shell structure
Photostability
Quantum dots

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10.1016/j.jlumin.2007.04.007

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title = "Preparation of water-soluble CdTe/CdS core/shell quantum dots with enhanced photostability",

abstract = "CdTe/CdS core/shell quantum dots (QDs) have been synthesized in an aqueous phase using thioacetamide as a sulfur source. The quantum yield was greatly enhanced by the epitaxial growth of a CdS shell, which was confirmed by X-ray photoelectron spectroscopy (XPS) results. The quantum yield of as-prepared CdTe/CdS core/shell QDs without any post-preparative processing reached 58\%. The experimental results illustrate that the QDs with core/shell structure show better photostability than thioglycolic acid (TGA)-capped CdTe QDs. The cyclic voltammograms reveal higher oxidation potentials for CdTe/CdS core/shell QDs than for TGA-capped CdTe QDs, which explains the superior photostability of QDs with a core/shell structure. This enhanced photostability makes these QDs with core/shell structure more suitable for bio-labeling and imaging.",

keywords = "Aqueous synthesis, CdTe/CdS, Core/shell structure, Photostability, Quantum dots",

author = "Hui Peng and Lijuan Zhang and Christian Soeller and Jadranka Travas-Sejdic",

year = "2007",

month = dec,

doi = "10.1016/j.jlumin.2007.04.007",

language = "英语",

volume = "127",

pages = "721--726",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier B.V.",

number = "2",

}

TY - JOUR

T1 - Preparation of water-soluble CdTe/CdS core/shell quantum dots with enhanced photostability

AU - Peng, Hui

AU - Zhang, Lijuan

AU - Soeller, Christian

AU - Travas-Sejdic, Jadranka

PY - 2007/12

Y1 - 2007/12

N2 - CdTe/CdS core/shell quantum dots (QDs) have been synthesized in an aqueous phase using thioacetamide as a sulfur source. The quantum yield was greatly enhanced by the epitaxial growth of a CdS shell, which was confirmed by X-ray photoelectron spectroscopy (XPS) results. The quantum yield of as-prepared CdTe/CdS core/shell QDs without any post-preparative processing reached 58%. The experimental results illustrate that the QDs with core/shell structure show better photostability than thioglycolic acid (TGA)-capped CdTe QDs. The cyclic voltammograms reveal higher oxidation potentials for CdTe/CdS core/shell QDs than for TGA-capped CdTe QDs, which explains the superior photostability of QDs with a core/shell structure. This enhanced photostability makes these QDs with core/shell structure more suitable for bio-labeling and imaging.

AB - CdTe/CdS core/shell quantum dots (QDs) have been synthesized in an aqueous phase using thioacetamide as a sulfur source. The quantum yield was greatly enhanced by the epitaxial growth of a CdS shell, which was confirmed by X-ray photoelectron spectroscopy (XPS) results. The quantum yield of as-prepared CdTe/CdS core/shell QDs without any post-preparative processing reached 58%. The experimental results illustrate that the QDs with core/shell structure show better photostability than thioglycolic acid (TGA)-capped CdTe QDs. The cyclic voltammograms reveal higher oxidation potentials for CdTe/CdS core/shell QDs than for TGA-capped CdTe QDs, which explains the superior photostability of QDs with a core/shell structure. This enhanced photostability makes these QDs with core/shell structure more suitable for bio-labeling and imaging.

KW - Aqueous synthesis

KW - CdTe/CdS

KW - Core/shell structure

KW - Photostability

KW - Quantum dots

UR - https://www.scopus.com/pages/publications/34547742560

U2 - 10.1016/j.jlumin.2007.04.007

DO - 10.1016/j.jlumin.2007.04.007

M3 - 文章

AN - SCOPUS:34547742560

SN - 0022-2313

VL - 127

SP - 721

EP - 726

JO - Journal of Luminescence

JF - Journal of Luminescence

IS - 2

ER -

Preparation of water-soluble CdTe/CdS core/shell quantum dots with enhanced photostability

Abstract

Keywords

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