A fluorometric optical fiber nanoprobe for copper(II) by using AgInZnS quantum dots
| Autor: | Yongfeng Liu, Xiaosheng Tang, Leilei Shi, Yulong Cao, Feng Qiu, Guolu Yin, Yongzhong Bai, Iroegbu Paul Ikechukwu, Wei Huang, Yuan Gong, Ligang Huang, Dingrong Qu, Tao Zhu, Xianbin Huang, Ming Deng |
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| Rok vydání: | 2020 |
| Předmět: |
Silver
Optical fiber Photoluminescence Materials science Absorption spectroscopy Analytical chemistry Nanoprobe Nanochemistry chemistry.chemical_element 02 engineering and technology Sulfides 010402 general chemistry Indium 01 natural sciences Analytical Chemistry law.invention law Quantum Dots Optical Fibers Fluorescent Dyes 021001 nanoscience & nanotechnology Copper 0104 chemical sciences Lakes Zinc Spectrometry Fluorescence chemistry Quantum dot 0210 nano-technology Luminescence Water Pollutants Chemical |
| Zdroj: | Microchimica Acta. 187 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-020-4110-5 |
| Popis: | An optical fiber nanoprobe is presented for fluorometric determination of copper(II). The method based on the use of water-dispersible AgInZnS quantum dots (QDs) deposited at the end of an optical fiber in a poly(vinyl alcohol) matrix. The fluorescnece of the QDs, best measured at excitation/emisssion wavelengths of 365/570 nm, is quenched by Cu(II) due to both static and electron transfer from the QDs to Cu(II). This is experimentally confirmed by photoluminescence and UV-vis absorption spectra, and measurement of luminescence lifetimes. The probe is highly selective and possesses a linear detection range that extends from 2.5 to 800 nM. Graphical abstractSchematic representation of an optical fiber nanoprobe based on hydrophilic AgInZnS quantum dots for fluorometric determination of copper(II). The fluorescence is quenched by Cu(II) due to static quenching and dynamic quenching. It has a detection range of 2.5-800 nM. |
| Databáze: | OpenAIRE |
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