Sarkar R., Kumbhakar P., Mitra A.K.
NIT Durgapur India, IN
Keywords: chemical synthesis, optical properties, ZnS nanoparticles
Nanoparticles of ZnS:Ag doped with Ag+ (0.5%) and capped with polyvinyl pyrolidone (PVP) have been synthesized by chemical co-precipitation method. The measured particle size is ~2.5 nm which has been obtained from the analyses of X-ray diffraction (XRD) pattern and high resolution transmission electron microscope (HRTEM) image of the sample. The optical absorption and photoluminescence (PL) emission properties are obtained by using UV-visible spectrophotometer and PL spectrometer, respectively. The quantum confinement effect is demonstrated by the blue shift in the bandgap of the sample. The Gaussian fittings of the measured room-temperature PL spectrum shows the presence of six emission bands centered at 356.5, 393, 449, 483, 508, and 526 nm. However, the intensity of the emission band at 393 nm in ZnS:Ag sample is the strongest and it is ~60 times more intense than that of the PL emission intensity obtained in an undoped ZnS sample.
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites
Published: June 13, 2011
Pages: 343 - 346
Industry sector: Advanced Materials & Manufacturing
Topic: Nanoparticle Synthesis & Applications
ISBN: 978-1-4398-7142-3