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- W1978651605 abstract "Abstract A high performance fiber-optic sensor for Cu2+ ions is proposed based on monodispersed hydrophobic CdSe/ZnS nanoparticles encapsulated within a silica shell and immobilized on the tip of an optical fiber by a polyvinyl alcohol (PVA) polymer coating. The experimental results show that the core–shell CdSe/ZnS@SiO2 nanostructure exhibits a strong reduction in luminescence intensity following interaction with Cu2+ ions. The porous silica shell of the nanostructure also plays a key role in the fluorescence quenching process by preventing the aggregation of the CdSe/ZnS nanoparticles; thereby promoting the adsorption of the Cu2+ ions. There were linear relationships between the relative fluorescence intensity (I0/I) and the concentration for Cu2+ ions from 0 to 10 μM (R2 = 0.9858). The resolution of this sensor detected by a commercial hand-held spectrometer was about 0.9 μM and therefore it is an ideal solution for applications in chemical and medical detections. The use of a silica-coated CdSe/ZnS QD has a number of key advantages as compared to the organic ligand modified QDs, including better selectivity, higher sensitivity, better chemical stability, and more stable with wide pH value." @default.
- W1978651605 created "2016-06-24" @default.
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- W1978651605 date "2012-04-01" @default.
- W1978651605 modified "2023-10-17" @default.
- W1978651605 title "Highly sensitive and selective sensor based on silica-coated CdSe/ZnS nanoparticles for Cu2+ ion detection" @default.
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- W1978651605 doi "https://doi.org/10.1016/j.snb.2012.02.028" @default.
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