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- W2564753259 abstract "Quantum dots (QDs) ink from Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> -doped ZnS (ZnS:Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> ) quantum dots with poly(vinyl alcohol) (PVA) as stabilizer has been synthesized by two steps. First, ZnS:Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> quantum dots were prepared by chemical co-precipitation method at room temperature and second, the powder of ZnS:Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> quantum dots was dispersed in a solution of poly(vinyl alcohol) (PVA), de-ionized water, and alcohol to achieve a stable ink formulation. The ZnS:Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> quantum dots exhibited both blue trap-state emission at around 430 nm and a strong orangered emission at about 600 nm with an excitation wavelength of 325 nm. The structural and optical properties of the ZnS:Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> quantum dots were characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Visible absorption spectrum and photoluminescence (PL) spectroscopy. XRD analysis showed the formation of cubic ZnS:Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> particles with average sizes from 2.0 to 2.53 nm while the particle size was estimated to be 10 nm from transmission electron microscopy (TEM). The ZnS:Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> quantum dots ink was printed on photographic paper using screen technique. The studied result indicated that the ZnS:Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> quantum dots can be used in the ink printing of security documents and labels, light - emitting diodes (LEDs), in novel photoluminescent display and advertising." @default.
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- W2564753259 date "2016-11-01" @default.
- W2564753259 modified "2023-09-27" @default.
- W2564753259 title "Elaboration and Investigation on Photoluminescence Enhancement of Poly (Vinyl Alcohol) Mn2+ Doped ZnS Quantum Dots for Security Ink Applications" @default.
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- W2564753259 doi "https://doi.org/10.1109/gtsd.2016.53" @default.
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