| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1232758 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2012 | 5 Pages |
Uncoated ZnS, ZnS:Mn2+, CdS and different thickness of CdS coated ZnS:Mn2+ core–shell nanoparticles were successfully synthesized by a simple chemical method in an air atmosphere. X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques were used to characterize the uncoated and the novel ZnS:Mn2+/CdS core–shell nanoparticles. The results show that the size of the ZnS:Mn2+/CdS core–shell nanoparticles is less than the bare ZnS:Mn2+. The PL study of ZnS:Mn2+/CdS core–shell nanoparticles shows an enhanced intensity than ZnS:Mn2+. The coating of CdS layer over ZnS:Mn2+ tuned the PL emission in the visible region. Addition of cadmium acetate (Cd 4 and 5 M) in ZnS:Mn2+ shows a distinct PL peak centered at 542 nm. The presence of Mn2+ ions in ZnS lattice and the growth of the CdS on ZnS:Mn2+ nanoparticles were confirmed by the ESR spectra.
Graphical abstractThe PL position of uncoated ZnS and CdS was tuned in the visible region by the way of doping and coating process. Enhanced PL emission was observed for ZnS:Mn/CdS core–shell nanoparticles.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► High quality core–shell nanoparticles were successfully synthesized by chemical method. ► The study on PL spectra of ZnS:Mn2+/CdS core–shell nanoparticles reveals an enhanced PL emission. ► The enhanced PL properties of ZnS:Mn2+/CdS show their potential application in optical devices.
