TY - JOUR
T1 - Preparation and Study of the Fluorescence Quenching for Different Core/Shell Structures Quantum Dots with Mercury (II) Induction
AU - Li, Hongxia
AU - Wang, Xingyu
AU - Wu, Yanping
AU - Wang, Kunjie
AU - Guan, Feng
AU - Feng, Huixia
AU - Fan, Haiyan
N1 - Funding Information:
This work was supported by grant Nos. 1310RJYA017 and 1112RJZA006 of the Natural Science Foundation of Gansu, National Natural Science Foundation of China (51063003); the Hongliu Young Teacher Cultivate Project of Lanzhou University of Technology (Q201211); and the Doctoral Research Start-Funded Projects of Lanzhou University of Technology.
PY - 2016/10/2
Y1 - 2016/10/2
N2 - The probes and sensors of the semiconductor quantum dots are the topic of intense research because they are able to show high-sensitivity fluorescence quenching under different ions conditions. Herein, different multishell structures of CdSe, CdSe-CdS, and CdSe-CdS-ZnS water-soluble quantum dots have been synthesized in aqueous solution. Transmission electron microscopy, Fourier transform infrared spectroscopy, and X-ray powder diffraction indicate that these quantum dots have high stability, homogeneous particle size and good monodispersity. More precisely, with different concentrations of mercury (II) induction, the mechanism of the fluorescence quenching for various structures of the quantum dots is discussed based electron transfer and nonradiative recombination patterns. Obtained results indicate that the core-shell structure of the CdSe-CdS quantum dots has the most beautiful performance, which shows high sensitivity in the detection of mercury (II). Moreover, this work provides some guidelines for the rational design of others fluorescence bioprobes and biosensors.
AB - The probes and sensors of the semiconductor quantum dots are the topic of intense research because they are able to show high-sensitivity fluorescence quenching under different ions conditions. Herein, different multishell structures of CdSe, CdSe-CdS, and CdSe-CdS-ZnS water-soluble quantum dots have been synthesized in aqueous solution. Transmission electron microscopy, Fourier transform infrared spectroscopy, and X-ray powder diffraction indicate that these quantum dots have high stability, homogeneous particle size and good monodispersity. More precisely, with different concentrations of mercury (II) induction, the mechanism of the fluorescence quenching for various structures of the quantum dots is discussed based electron transfer and nonradiative recombination patterns. Obtained results indicate that the core-shell structure of the CdSe-CdS quantum dots has the most beautiful performance, which shows high sensitivity in the detection of mercury (II). Moreover, this work provides some guidelines for the rational design of others fluorescence bioprobes and biosensors.
KW - fluorescence quenching
KW - mechanism
KW - mercury (II) induction
KW - multishell structures
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U2 - 10.1080/15533174.2015.1137030
DO - 10.1080/15533174.2015.1137030
M3 - Article
AN - SCOPUS:84971524694
VL - 46
SP - 1571
EP - 1578
JO - Inorganic and Nano-Metal Chemistry
JF - Inorganic and Nano-Metal Chemistry
SN - 2470-1556
IS - 10
ER -