Synthesis and Characterizations of ZnS:Cu/ZnS Assisted by 3-Mercaptopropionic Acid
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3-Mercaptopropionic acid capped core/shell ZnS:Cu(3%)/ZnS doped quantum dots (QDs) where synthesized at 95 °C in basic aqueous solution using the nucleation doping approach methods. The structural and optical properties of the QDs were characterized by X-ray diffraction (XRD) which confirms the cubic phase blende, whereas transmission electron microscopy (TEM) which shows the nanoparticles are spherical. UV–vis spectroscopy and photoluminescence (PL) spectroscopy. The obtained nearly monodisperse QDs have an average diameter of ca. 3.31 nm and a zinc blende crystal structure. The PL emission wavelength was limited between 500 and 510 nm but PL quantum efficiency of ZnS:Cu/ZnS core/shell nanocrystals increased up to 5%. The experimental results demonstrate that this method is effective for the preparation of ZnS:Cu/ZnS quantum dots.
KeywordsQuantum dots Semiconductor Core/shell Fluorescence
The authors are grateful to the team at the Laboratory of Synthesis and Structure of Nanomaterials and laboratoire Réactions et Génie des Procédés (LRGP), UMR 7274, CNRS, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France.
LH and LS drafted and revised the manuscript. LH carried out the synthetic experiments and characterizations. LH and LS participated in the scientific flow. All authors read and approved the final manuscript.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no competing interests.
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