Recyclable fluorescent gold nanocluster membrane for visual sensing of copper(II) ion in aqueous solution
| Autor: | Guonan Chen, Liyan Zheng, Fenqiang Luo, Yaxian Wang, Tongqing Dong, Yuwu Chi, Zhijin Lin |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Ultraviolet Rays Metal ions in aqueous solution Inorganic chemistry Analytical chemistry chemistry.chemical_element Metal Nanoparticles Environmental pollution Biochemistry Analytical Chemistry Nanoclusters Electrochemistry Environmental Chemistry Animals Spectroscopy Fluorescent Dyes Ions Aqueous solution Water Membranes Artificial Serum Albumin Bovine Hydrogen-Ion Concentration Copper Fluorescence Membrane Immobilized Proteins chemistry Reagent Cattle Gold |
| Zdroj: | The Analyst. 137(10) |
| ISSN: | 1364-5528 |
| Popis: | Recently, metal-selective fluorescent chemosensors have attracted intense attention for their simple and real-time tracking of metal ions in environmental samples. However, most of the existing fluorescent sensors are one-off sensors and thus suffer from large amount of reagent consumption, significant experimental cost and raising the risk of environmental pollution. In this paper, we developed a green (low reagent consumption, low-toxicity reagent use), recyclable, and visual sensor for Cu(2+) in aqueous solution by using a fluorescent gold nanoclusters membrane (FGM) as the sensing unit, basing on our findings on gold nanoclusters (Au NCs) that the bovine serum albumin (BSA)-coated Au NCs exhibit excellent membrane-forming ability under the isoelectric point of BSA, and thus enable us to obtain a new type of sensing membrane (i.e. FGM) by denaturing Au NCs; the fluorescence of FGM can be significantly quenched by Cu(2+) ion, and the quenched fluorescence can be totally recovered by histidine; the as-prepared FGM is very stable and recyclable, which makes it an ideal sensing material. |
| Databáze: | OpenAIRE |
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