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- W2898814802 abstract "Abstract The deployment of traditional radioactive isotopes as tracers has the drawback of environmental concerns. In this study, we investigated alternative luminescent zinc oxide quantum dots embedded silica (ZnO@SiO2) nanoparticles as tracers for oil reservoir applications. ZnO quantum dots (QDs) were prepared via solgel process having an average diameter of ~5 nm. For the encapsulation of these ZnO QDs, tetraethyl orthosilicate (TEOS) was utilized to synthesize hydrophilic ZnO@SiO2 nanoparticles (H-NPs), while dimethyldiethoxysilane (DMDES) in combination with TEOS was used to prepare partially hydrophobic ZnO@SiO2 (PH-NPs). The fluorescence of bare ZnO QDs was compared to that of silica-coated ZnO@SiO2 NPs in various solvents. The effects of cetyltrimethylammonium bromide (CTAB) surfactant and silica coatings on the fluorescence of ZnO QDs were investigated by photoluminescence spectroscopy. The fluorescence and structural properties of ZnO@SiO2 nano-tracers were examined in highly saline water and at elevated temperature to mimic the oil reservoir environment. The significant improvement in fluorescence emission stability was achieved for PH-NPs in harsh conditions, which advocates their potential use as a tracer material for oil exploration." @default.
- W2898814802 created "2018-11-09" @default.
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- W2898814802 date "2019-01-01" @default.
- W2898814802 modified "2023-09-25" @default.
- W2898814802 title "Colloidal solution of luminescent ZnO quantum dots embedded silica as nano-tracers for remote sensing applications" @default.
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- W2898814802 doi "https://doi.org/10.1016/j.molliq.2018.11.001" @default.
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