Synthesis of highly size confined ZnS quantum dots and its functional characteristics

ZnS quantum dots have been synthesized at room temperature using N-Methylaniline by wet chemical route. X-ray diffraction pattern confirms the cubic phase of ZnS. TEM images reveal the spherical morphology with the size of 2-5 nm in uniform distribution. Strong blue shift is observed from the UV visible absorption spectrum with band gap of 4.37 eV. Enhanced photoluminescence near band edge emission is observed at 346 nm. The possible growth mechanism of surface passivation has been discussed. The presence of functional groups is identified by Fourier transformation infra red spectroscopy and the inorganic elements are identified using energy dispersive X-ray analysis. (C) 2011 Elsevier B.V. All rights reserved.