Nanotech 2011 Vol. 1
Nanotech 2011 Vol. 1
Nanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites

Nanoparticle Synthesis & Applications Chapter 3

Enhancement in photoluminescence emission in the UV-visible region from chemically synthesized silver doped ZnS nanoparticles

Authors: R. Sarkar, P. Kumbhakar, A.K. Mitra

Affilation: NIT Durgapur, India, India

Pages: 343 - 346

Keywords: ZnS nanoparticles, chemical synthesis, optical properties

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.

ISBN: 978-1-4398-7142-3
Pages: 882
Hardcopy: $199.95