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- W2083788966 abstract "Abstract This paper described a facile aqueous route to prepare CdS: Eu quantum dots (QDs) with strong yellow emission using l -cysteine ( l -Cys) as the capping ligands. X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) confirm that the CdS:Eu QDs have a cubic structure with good crystallinity, the average diameter of the CdS:Eu QDs is about 8 nm. The traces of groups adsorbed on CdS:Eu QDs were confirmed via FT-IR spectra. In addition, the synthesis parameters including the concentration of doped Eu 3+ ions, the pH value and the reaction time have influence on the optical properties of CdS:Eu QDs. The as-prepared l -Cys capped CdS:Eu QDs were used as a fluorescence probe to detect Hg 2+ ions in aqueous media based on fluorescence quenching. The response of l -Cys capped CdS:Eu QDs as a fluorescence probe was linearly proportional to the concentration of Hg 2+ ions in the range of 5 × 10 −6 to 1 × 10 −3 mol L −1 with a limit of detection of 2 × 10 −6 mol L −1 ." @default.
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- W2083788966 date "2013-07-01" @default.
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- W2083788966 title "Facile synthesis l-cysteine capped CdS:Eu quantum dots and their Hg2+ sensitive properties" @default.
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- W2083788966 doi "https://doi.org/10.1016/j.apsusc.2013.03.093" @default.
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