Luminescent nanoparticles of Mn doped ZnS passivated with sodium hexametaphosphate

By H. Warad, S. C. Ghosh, B. Hemtanon, Chanchana Thanachayanont, Joydeep Dutta. 2005

163 citations recorded by the source corpus.

Abstract We report the synthesis of luminescent nanoparticles of manganese doped zinc sulfide (ZnS:Mn2+) with an emission peak at around 590 nm. Nanoparticles of ZnS:Mn2+ are prepared by a co-precipitation reaction from homogenous solutions of zinc and manganese salts. Based on Ostwald ripening and surface passivation, we discuss a mechanism for the formation of ZnS:Mn2+ nanoparticles. The reaction proceeds with the nucleation of ZnS crystals, which are immediately passivated by the anions in the solution. This in turn attracts cations including zinc and manganese which contribute to the growth of the crystal. These nanoparticles are sterically stabilized using polyphosphates of sodium namely sodium tripolyphosphate (STTP) and sodium hexametaphosphate (SHMP). The nanoparticles consist of particles of 60–80 nm in diameter, each containing primary crystallites that was estimated from the X-ray diffraction patterns to be at around 2.2 nm.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/de4a00b8644f94193e3fc456e1eaf174e4df429f

Citations in the corpus

• Nanotechnology applications in pollution sensing and degradation in agriculture: a review (2009, unknown): “Research is going on for the replacement of organic dyes used for staining biological cells with fluorescent nanoparticles or quantum dots like manganesedoped zinc sulphide (Baruah et al. 2008a, b; Warad et al. 2005 ) and cadmium selenide (Guo et al. 2006).”