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

Nanoscale Research Letters
Chuanmiao YanJun Ren

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 degrees 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(2)O(2).

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Citations

Jan 11, 2011·Nanomedicine : Nanotechnology, Biology, and Medicine·Patrick S MackayWellington Pham
Sep 3, 2016·Chemical Reviews·Lihong JingMingyuan Gao
Oct 27, 2010·Chemical Reviews·Prashant V KamatEmmy J Radich
May 4, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Anirban SamantaYan Liu
Mar 27, 2012·Inorganic Chemistry·Mausam KalitaStefan H Bossmann
Mar 21, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Xinbing JiangHongmei Zhang

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Methods Mentioned

BETA
X-ray
transmission electron microscopy
Fluorescence
confocal microscopy

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