Synthesis and photoluminescence enhancement of Mn2+-doped ZnS nanocrystals

Mn2+-doped ZnS nanoparticles were synthesized by a chemical precipitation m ethod at room temperature. The particle size was estimated to be 2.8nm from high-resolution transmission electron microscopy (HRTEM) and calculated as 2.6 +/- 0.4 nm from peak broadening of the X-ray diffraction (XRD) pattern . A 30-fold increase in photoluminescence intensity has been observed from Mn2+-doped ZnS nanoparticles after surface passivation by a passivating age nt with carboxylic functional groups. (C) 2001 Elsevier Science B.V, All ri ghts reserved.