Abstract:
Project explores the opportunity of employing the tunable multifunctional
magnetic nanoparticles in the development of self-assembled multilayer thin
films. Another objective was to use charges ions to understand the factors, which
control the formation of films. Main objective was to carry out research to develop
nanoparticles and their thin films. Magnetic nanoparticles of nickel ferrite were
synthesized by two different routes. Self assembled layers of nanoparticles were
deposited on the glass substrate by using different polymers. Analyses were
carried out to know about the structure of nanoparticles and the uniformity of the
coatings. SEM and AFM analyses have clearly indicated the formation of thin
films with uniform morphology. Potential applications of the fabricated films have
also been discussed, especially in consideration of their role in biomedical
applications. In a related project, nanoparticles of manganese nickel ferrite were
also prepared. Mn1-xNixFe2O4 of varying compositions with Ni concentration x =
0.00, 0.25, 0.50, 0.75, 1.00 were prepared by chemical coprecipitation method.
The prepared nano-ferrites were characterized by X-ray fluorescence (XRF),
infrared spectroscopy (IR), X-ray diffraction (XRD), scanning electron microscope
(SEM), and atomic force microscope (AFM) to study the compositional, structural
and morphological changes taking place with varying Ni concentration x in the
composition of the prepared nanoferrites. The XRD results indicated the
preparation of single spinel ferrite and crystalline size were in the range of 14-26
nm. Further information about the morphology of the nanoferriets was obtained
from AFM and SEM results. These observations indicate that the characteristics
of the synthesized materials can be controlled by varying the compositions in the
Mn-Ni ferrites.
