Fabrication of Organic/Inorganic Core/Shell Nanocomposites with Controlled Crystallite size

Abstract

In the present work, different metal oxide and metal chalcogenide are used as the core materials with the controlled grain size which coated by the polymer. Metal nanoparticles used as various types of catalysts, adsorbents, and sensors. They have applications in optical, electronic and magnetic devices. Most of these applications vitally depend on the size of the nanoparticles. Therefore the synthesis of controlled crystallite size nanoparticles important for above mentioned applications. Here, lead sulfide (PbS), tin oxide (SnO2), and Cadmium Sulfide (CdS) core materials coated by the polypyrrole (PPy). To form the core and the shell set the diameter fixed and measured theoretically. Weight is proportional to the product of volume and density. The theory behind this is to calculate the amount of precursor. The calculated amount is used to prepare the core as well as the shell which is formed by simple wet chemical method and addition polymerization. The XRD studies are used to determine the crystallite size of the core/shell nanocomposites. Thus the desired crystallite size is successfully obtained. Transmission Electron Microscope also confirms the formation of core/shell structure directly. Keywords: Core, Shell, nanocomposites, polypyrrole, TEM