NDLI: Highly luminescent hybrid $SiO_{2}-coated$ CdTe quantum dots: synthesis and properties

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Highly luminescent hybrid $SiO_{2}-coated$ CdTe quantum dots: synthesis and properties

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Highly luminescent hybrid $SiO_{2}-coated$ CdTe quantum dots: synthesis and properties

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Liu, Ning Yang, Ping
Description	Author Affiliation: Liu N ( School of Material Science and Engineering, University of Jinan, 250022 Jinan, People's Republic of China.)
Abstract	Novel hybrid $SiO_{2}-coated$ CdTe quantum dots (QDs) were created using CdTe QDs coated with a hybrid $SiO_{2}$ shell containing $Cd^{2+}$ ions and a sulfur source via a sol–gel process in aqueous solution. Aqueous CdTe QDs with tunable emitting color created through a reaction between cadmium chloride and sodium hydrogen telluride was used as cores for the preparation of hybrid $SiO_{2}-coated$ CdTe QDs. In our experiments we found that the surface state of the cores and preparation conditions that affect the formation of the hybrid $SiO_{2}$ shell also greatly affect photoluminescence of the hybrid $SiO_{2}-coated$ CdTe QDs. The generation of CdS-like clusters in the vicinity of the CdTe QDs, caused the quantum size effect of the QDs to be greatly reduced, which changes photoluminescence properties of the hybrid QDs fundamentally. Namely, the novel hybrid $SiO_{2}$ shell played an important role in generating a series of specific optical properties. In addition, the novel hybrid $SiO_{2}$ shell can be created if no CdTe QD is added. In order to gain an insight into the inter structure of the hybrid shell, we characterized the hybrid $SiO_{2}-coated$ CdTe QDs using X-ray diffraction analysis and discuss the formation mechanism of such a hybrid structure. This work is significant because the novel hybrid $SiO_{2}-coated$ CdTe QDs with its excellent properties can be used in many applications, such as biolabeling and optoelectronic devices. Copyright © 2013 John Wiley & Sons, Ltd.
File Format	HTM / HTML
ISSN	15227235
Issue Number	4
Journal	Luminescence
Volume Number	28
e-ISSN	15227243
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2013-07-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Biophysics Discipline Biochemistry Cadmium Compounds Chemistry Luminescence Quantum Dots Silicon Dioxide Tellurium Luminescent Measurements Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Chemistry Biophysics

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