期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 169, 期 -, 页码 161-168出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2016.05.007
关键词
Quantum dots; Optical nanomaterials; Copper(II) ion; Fluorescence sensors; Chemical sensors
类别
资金
- Thailand Research Fund [RSA5780021, RTA5380003]
- Thailand Research Fund (TRF) through the Royal Golden Jubilee (RGJ) Ph.D. Program [PHD/0039/2556]
- Higher Education Research Promotion
- National Research University Project of Thailand
- Office of the Higher Education Commission, through the Advanced Functional Materials Cluster of Khon Kaen University
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Office of the Higher Education Commission, Ministry of Education
We described a turn-on fluorescence sensor for the determination of Cu2+ ions, utilizing the quantum confinement effect of cadmium sulfide quantum dots capped with cysteamine (Cys-CdS QDs). The fluorescence intensity of the Cys-CdS QDs was both enhanced and red shifted (from blue-green to yellow) in the presence of Cu2+. Fluorescence enhancement was linearly proportional to the concentration of Cu2+ in the concentration range 2 to 10 mu M. Other cations at the same concentration level did not significantly change the intensity and spectral maxima of Cys-CdS QDs, except Ag+. The limit of detection was 1.5 mu M. The sensor was applied to the determination of Cu2+ in (spiked) real water samples and gave satisfactory results, with recoveries ranging from 96.7 to 108.2%, and with RSDs ranging from 0.3 to 2.6%. (C) 2016 Elsevier B.V. All rights reserved.
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