Abstract
Nano-particles can be prepared easily by
different chemical, physical and biological
approaches. But the biological approach is the
most emerging approach of preparation, because,
this method is easier than the other methods,
eco-friendly and less time consuming. In this
work green synthesis was done by using the
aqueous solution of Azadirachta indica (Neem)
and Murraya koenigii (Curry) leaf extract and
AgNO3. Silver was of a particular interest for
this process due to its evocative physical and
chemical properties. A fixed ratio of plant extract
to metal ion was prepared and the colour change
was observed which proved the formation
of nano-particles. The nano-particles were
characterized by UV-Vis spectroscopy and X-ray
diffraction technique. The UV-VIS spectroscopy
shows sharp absorbance around 440 nm, it also
reveals the band gap to be around 2.5 eV and
3.2 eV for Ag nano-particles synthesized using
Neem leaves and curry leaves respectively. The
particle size was found to be 35 nm and 21 nm
for Ag nano-particles synthesized using Neem
leaves and curry leaves respectively.
Keywords:
Nano-particles, Green Synthesis, UV-Vis
spectroscopy X-ray diffraction technique.
- Introduction
Nano-technology is one of the most rapidly
progressing fields of technology and it has opened
up numerous new frontiers of research for us.
Its advent into the field targeted drug delivery,
therapeutic drug delivery, therapeutic actions
and as bio sensors has captured the imagination
of the scientific community and various methods
are being devised to from new nano-particles
with more specifications, scientists are striving
to come up with methods which let us control the
shape, size,of the particles more closely.