SYNTHESIS, CHARACTERIZATION AND APPLICATION OF CDSE NANOPARTICLES - PVA, PLA FILM

Abstract

Semiconducting nanoparticles, whose particle size is in the nanometer range, have very unusual properties. These materials have size dependent physical and chemical properties. The electronic structure of these materials is between the molecule and bulk which lead to drastic change in the physical properties. Blue-shift in the optical absorption spectrum, size dependent luminescence, nonlinear optical effects are some examples of the interesting properties exhibited by these nanomaterial. Monodispersed CdSe nanoparticles of various sizes were prepared .These nanoparticles were used to prepare the nanoparticles polyvinyl alcohol and nanoparticles polylactic acid film.The prepared samples were characterized by UV-Visible Spectroscopy, Photoluminescence spectroscopy (PL) to study the optical properties. The structural and phase analysis was done with the help of X-ray diffraction (XRD).The surface morphology of the formed samples were analyzed by the Scanning Electron microscope and Atomic Force Microscope. Energy dispersive X-ray spectroscopy (EDX) was used for the elemental analysis. These nanoparticle films can be used in electronics by tuning the optical band by controlling the particle size of the nanomaterial.