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.