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- W3093563683 endingPage "119099" @default.
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- W3093563683 abstract "A novel Type-I Mn: [email protected] core–shell quantum dots (QDs) was reported through a two-step procedure by using low-cost inorganic salts and natural biomacromolecule as raw materials. Based on a designed structure of L-cysteine-capped Mn: ZnSe QDs in aqueous media with the controllable surface, Mn: [email protected] core–shell QDs were formed due to photoactive ions and defect curing under continuous constant light. The influences of experimental variables, including synthesis conditions of Mn: ZnSe QDs, different types and affecting factors of photo irradiation had been systematically investigated. Under the effect of photoinduced fluorescence enhancement, the photoluminescence (PL) intensity increases significantly by about 5–10 times after 1–3 h of UV irradiation. The position of the fluorescence peak was red-shifted by about 17 nm, emitting orange-red fluorescence. The photoluminescence quantum yield (PL QY) was markedly improved (up to 35%). The structure and morphology of Mn: [email protected] core–shell QDs were also confirmed by Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDS) in detail. The mechanism of photoinduced fluorescence enhancement was attributed to L-cysteine allowed to release S2- to form a ZnS shell, and the passivated surface non-radiative relaxation centers of Mn: [email protected] QDs was successfully synthesized with high uniform size, excellent photoluminescence performance, and good stability, all of which make them good potential candidates for white LEDs, and biological labels." @default.
- W3093563683 created "2020-10-29" @default.
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- W3093563683 date "2021-03-01" @default.
- W3093563683 modified "2023-10-10" @default.
- W3093563683 title "Novel synthesis of Mn: ZnSe@ZnS core–shell quantum dots based on photoinduced fluorescence enhancement" @default.
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- W3093563683 doi "https://doi.org/10.1016/j.saa.2020.119099" @default.
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