Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 93, Issue -, Pages 53-57Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2012.02.032
Keywords
Nanoparticles; Surface modification; Surface defect; Quantum confinement; Photoluminescence
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Water soluble ZnS, CdS and multilayer coated ZnS/CdS/ZnS nanocomposites were successfully synthesized by chemical method in an air atmosphere. Structural, morphology and optical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible absorption (UV-vis) and photoluminescence (PL) spectrometer. The obtained particles are highly crystalline and monodisperse with an average particle size of 4.3-5.6 nm range. A significant red shift was observed by increasing the CdS thickness in ZnS/CdS/ZnS nanocomposites. The PL position of ZnS and CdS compound is tuned in the visible region by the way of alteration layer thickness. (C) 2012 Elsevier B.V. All rights reserved.
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