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Mechanism towards Fluorescence of CdTe Quantum Dots Quenched by Magnetic Iron Oxide Nanoparticles

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Abstract:

In this study, fluorescence spectrum and UV-vis absorption spectrum were employed to explore the interactions between magnetic iron oxide nanoparticles modified by citric acid (CA-MION) and CdTe quantum dots modified by thioglycolic acid (TGA-CdTe QDs). Significantly, the mechanism was demonstrated as a dynamic quenching process based on energy transfer. Taken together, these results showed the decreased fluorescence intensity of CdTe QDs implied satisfactory linear relationship with various concentrations of CA-MION ranged from 0.15×10-3 mol·L-1 to 4.5×10-3 mol·L-1. Overall, this study has provided the potential for preparing multimagnetic-fluorescent nanocomposites and further developing quantitative detections of multi-analytes.

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Periodical:

Advanced Materials Research (Volume 1053)

Pages:

185-190

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1053.185

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Online since:

October 2014

Authors:

Xing Hui Liu, Xiao Ming Yang

Keywords:

CdTe Quantum Dots, Dynamic Quenching, Energy Transfer, Magnetic Iron Oxide Nanoparticles

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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