Abstract:
ZnO possesses wurtzite hexagonal structure and space group P63mc. By nature it’s an n-type
conductor due to its native defects. The source of n-type conductivity is still a great debate. The
defects are the most suggested reason for the n-type behavior of ZnO. ZnO has a lot of
applications in lasing, LEDs, piezoelectric transducers, varistors, sunscreens, solar cells, photo
catalysis, medicine and food industry. Its anti-bacterial and anti-fungal properties are employed
in medicine and food preservation respectively. For doping and making composites bottom up
approach is followed. In this work ‘Hydrothermal method’ which is a bottom up approach, is used
to synthesize the nanoparticles. Particles of various sizes and shapes can be obtained by small
change in precursor amount, temperature, pressure and pH. A lot of variety in nanostructures
can be achieved that have usage in fields of bio-photonics, bio-medical, electronics and optoelectronics
etc. It involves simple apparatus and also helps in producing core shell
nanostructures.
Zinc Oxide hexagonal nanoparticles have been synthesized in this work using SDS and PVP as
capping agents. The samples were prepared for different ratio of capping agents and then doping
of Al, Mn, Li and Ag with 1%, 2% and 5% in 1:1 sample. Among all, the best results were of 1%
doping samples so results for only 1% (with 1:1 of the capping agents) are reported here. For
analysis of all the samples various characterizations i.e. XRD, SEM, EDS, FTIR and UV-DRS were
done. The information about structure, crystallite size and lattice parameters was obtained by
XRD analysis. The morphology and composition was known through SEM and EDS. The functional
groups was studied through FTIR and finally band gap was determined by UV-DRS. All the
synthesized particles can be studied for anti-bacterial and anti-fungal properties.
