Synthesis of Aqueous CdTe/CdS/ZnS Core/shell/shell Quantum Dots by a Chemical Aerosol Flow Method

Chuanmiao Yan; Fangqiong Tang; Linlin Li; Hongbo Li; Xinglu Huang; Dong Chen; Xianwei Meng; Jun Ren

doi:10.1007/s11671-009-9464-x

Synthesis of Aqueous CdTe/CdS/ZnS Core/shell/shell Quantum Dots by a Chemical Aerosol Flow Method

Chuanmiao Yan, Fangqiong Tang^*, Linlin Li, Hongbo Li, Xinglu Huang, Dong Chen, Xianwei Meng, Jun Ren

^*Corresponding author for this work

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

47 Citations (Scopus)

Abstract

This work described a continuous method to synthesize CdTe/CdS/ZnS core/shell/shell quantum dots. In an integrated system by flawlessly combining the chemical aerosol flow system working at high temperature (200-300°C) to generate CdTe/CdS intermediate products and an additional heat-up setup at relatively low temperature to overcoat the ZnS shells, the CdTe/CdS/ZnS multishell structures were realized. The as-synthesized CdTe/CdS/ZnS core/shell/shell quantum dots are characterized by photoluminescence spectra, X-ray diffraction (XRD), energy-dispersive X-ray spectra (EDS), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). Fluorescence and XRD results confirm that the obtained quantum dots have a core/shell/shell structure. It shows the highest quantum yield above 45% when compared to the rhodamine 6G. The core/shell/shell QDs were more stable via the oxidation experiment by H ₂O ₂.

Original language	English
Pages (from-to)	189-194
Number of pages	6
Journal	Nanoscale Research Letters
Volume	5
Issue number	1
DOIs	https://doi.org/10.1007/s11671-009-9464-x
Publication status	Published - Jan 2010
Externally published	Yes

Keywords

Aqueous
CdTe/CdS/ZnS
Chemical aerosol flow
Core-shell
Quantum dot

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10.1007/s11671-009-9464-x

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title = "Synthesis of Aqueous CdTe/CdS/ZnS Core/shell/shell Quantum Dots by a Chemical Aerosol Flow Method",

abstract = "This work described a continuous method to synthesize CdTe/CdS/ZnS core/shell/shell quantum dots. In an integrated system by flawlessly combining the chemical aerosol flow system working at high temperature (200-300°C) to generate CdTe/CdS intermediate products and an additional heat-up setup at relatively low temperature to overcoat the ZnS shells, the CdTe/CdS/ZnS multishell structures were realized. The as-synthesized CdTe/CdS/ZnS core/shell/shell quantum dots are characterized by photoluminescence spectra, X-ray diffraction (XRD), energy-dispersive X-ray spectra (EDS), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). Fluorescence and XRD results confirm that the obtained quantum dots have a core/shell/shell structure. It shows the highest quantum yield above 45% when compared to the rhodamine 6G. The core/shell/shell QDs were more stable via the oxidation experiment by H 2O 2.",

keywords = "Aqueous, CdTe/CdS/ZnS, Chemical aerosol flow, Core-shell, Quantum dot",

author = "Chuanmiao Yan and Fangqiong Tang and Linlin Li and Hongbo Li and Xinglu Huang and Dong Chen and Xianwei Meng and Jun Ren",

year = "2010",

month = jan,

doi = "10.1007/s11671-009-9464-x",

language = "English",

volume = "5",

pages = "189--194",

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T1 - Synthesis of Aqueous CdTe/CdS/ZnS Core/shell/shell Quantum Dots by a Chemical Aerosol Flow Method

AU - Yan, Chuanmiao

AU - Tang, Fangqiong

AU - Li, Linlin

AU - Li, Hongbo

AU - Huang, Xinglu

AU - Chen, Dong

AU - Meng, Xianwei

AU - Ren, Jun

PY - 2010/1

Y1 - 2010/1

N2 - This work described a continuous method to synthesize CdTe/CdS/ZnS core/shell/shell quantum dots. In an integrated system by flawlessly combining the chemical aerosol flow system working at high temperature (200-300°C) to generate CdTe/CdS intermediate products and an additional heat-up setup at relatively low temperature to overcoat the ZnS shells, the CdTe/CdS/ZnS multishell structures were realized. The as-synthesized CdTe/CdS/ZnS core/shell/shell quantum dots are characterized by photoluminescence spectra, X-ray diffraction (XRD), energy-dispersive X-ray spectra (EDS), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). Fluorescence and XRD results confirm that the obtained quantum dots have a core/shell/shell structure. It shows the highest quantum yield above 45% when compared to the rhodamine 6G. The core/shell/shell QDs were more stable via the oxidation experiment by H 2O 2.

AB - This work described a continuous method to synthesize CdTe/CdS/ZnS core/shell/shell quantum dots. In an integrated system by flawlessly combining the chemical aerosol flow system working at high temperature (200-300°C) to generate CdTe/CdS intermediate products and an additional heat-up setup at relatively low temperature to overcoat the ZnS shells, the CdTe/CdS/ZnS multishell structures were realized. The as-synthesized CdTe/CdS/ZnS core/shell/shell quantum dots are characterized by photoluminescence spectra, X-ray diffraction (XRD), energy-dispersive X-ray spectra (EDS), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). Fluorescence and XRD results confirm that the obtained quantum dots have a core/shell/shell structure. It shows the highest quantum yield above 45% when compared to the rhodamine 6G. The core/shell/shell QDs were more stable via the oxidation experiment by H 2O 2.

KW - Aqueous

KW - CdTe/CdS/ZnS

KW - Chemical aerosol flow

KW - Core-shell

KW - Quantum dot

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ER -

Synthesis of Aqueous CdTe/CdS/ZnS Core/shell/shell Quantum Dots by a Chemical Aerosol Flow Method

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Keywords

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