Structural and Morphological Characterization of CdS Nanoparticles

Abstract

Aims: CdS nanoparticles are an attractive material having applications in various fields like pigment in paints, biotag for bioimaging and many more optoelectronic as well as biological applications. The present study aims to synthesize and characterize the CdS nanoparticles to make it applicable in different areas. Objectives: Preparation of CdS nanoparticles by using simple and facile chemical methods and further physical and structural characterization using various physical tools. Methods: In present work, CdS nanoparticles have been synthesized by using a rationally simple chemical precipitation method with some modification on temperature and incubation time in existed methods. Characterizations were done by employing XRD, SEM, TEM and AFM techniques. Results: Simple chemical method produces the CdS nanoparticles with a size of about 100- 200 nm in length and 5-10 nm in diameter. The SEM studies show that the CdS nanoparticles can agglomerate and form a continuous network-like structure. The X-Ray Diffraction (XRD) measurements show the single-phase formation of CdS nanoparticles with the structure of the cubic phase, and the broadening of XRD patterns indicates that the prepared samples are nanostructured. Our analysis of CdS nanoparticles by using a transmission electron microscope and Atomic Force Microscope (AFM) revealed that the nanoparticles form both spherical and nearly rod-shaped with the average size applicable for biotagging. UV-Vis spectroscopic analysis reveals a blue shift in the absorption peak probably caused by quantum confinement. Conclusion: The observed CdS nanoparticles were appeared yellow in color. The XRD pattern of the CdS nanoparticles showed that the materials were of nanometric sized regime with a predominantly cubic phase along with the rod and round morphology. The study and characterization of CdS nanoparticles will bring us a new approach to understand the biological problem by tagging nanoparticles with biomolecules and further suggest that the CdS nanoparticles formulate it more suitable biocompatible nanomaterial for biotagging and bioimaging.