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Thermochemical growth of Mn-doped CdS nanoparticles and study of luminescence evolution

Marandi, M ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1088/0957-4484/19/22/225705
  3. Publisher: 2008
  4. Abstract:
  5. We report a new method of growing Mn-doped CdS (CdS:Mn) nanoparticles in an aqueous solution at boiling temperature. The idea is to use precursors that react only at high temperature, in order to gain crystalline luminescent nanoparticles. CdSO4, Mn(NO3)2 and Na 2S2O3 were used as the precursors, and thioglycerol was employed as the capping agent and also the reaction catalyst. Na2S2O3 is thermally sensitive and it releases S2- ions upon heating. The CdS:Mn nanoparticles obtained are about 4 nm in size and show both cubic and hexagonal crystalline phases with a ratio of 35% to 65%. The luminescence of nanoparticles contains a peak at 580 nm, which is related to Mn2+ ions. Prolonged reaction time results in a decrease of the Mn luminescence peak to about 35% of the maximum value. We discuss the possible causes of the Mn peak reduction and attribute it to preferential dissolution of Mn ions into the solution due to shape reconfiguration of the nanoparticles. © IOP Publishing Ltd
  6. Keywords:
  7. Cadmium compounds ; Doping (additives) ; Luminescence ; Solutions ; Thermochemistry ; Boiling temperature ; Luminescence evolution ; Thermochemical growth ; Nanoparticles ; Cadmium sulfate ; Cadmium sulfide ; Manganese ; Manganese nitrate ; Nanoparticle ; Sodium sulfide ; Aqueous solution ; Catalysis ; Crystallization ; Dissolution ; High temperature procedures ; Nonhuman ; Priority journal ; Thermal analysis ; Thermochemical analysis ; X ray diffraction
  8. Source: Nanotechnology ; Volume 19, Issue 22 , 2008 ; 09574484 (ISSN)
  9. URL: https://iopscience.iop.org/article/10.1088/0957-4484/19/22/225705