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Quantum dot particles optical and structural characterization. a X-ray diffraction patterns of CdS-Dx/QDs. b HRTEM images of CdS-Dx/QDs. The nanoparticles appear agglomerated in the polymeric matrix of dextrin. A close-up image shows a spherical CdS nanoparticles with particle size in the range of 3–5 nm. c Size distribution of CdS-Dx/QDs. d UV–visible spectrum of size distribution of CdS-Dx/QDs. e Room temperature photoluminescence spectrum of CdS-Dx/QDs
