A green approach is used to prepare Nano-Ag in laboratory at room temperature, which is beneficial to eliminate the toxic effects of nano-Ag.

1. .

2. . NANOPARTICLES
Nanoparticles are particles between 1 and
100 nanometers in size. In nanotechnology , a
particle is defined as a small object that
behaves as a whole unit with respect to its
transport and properties. Particles are further
classified according to diameter.

3. .Green Synthesis :
Green Chemistry is the design of chemical
products and processes that reduce or
eliminate the use and generation of
hazardous substances .

4. Silver nanoparticles are being used in numerous technologies and
incorporated into a wide array of consumer products that take advantage of
their desirable optical, conductive, and antibacterial properties.
Silver Nanoparticle Applications
•Diagnostic Applications
Silver nanoparticles are used in biosensors and numerous assays where the
silver nanoparticle materials can be used as biological tags for quantitative
detection.
•Antibacterial Applications
Silver nanoparticles are incorporated in apparel, footwear, paints, wound
dressings, appliances, cosmetics, and plastics for their antibacterial
properties.

5. •Conductive Applications
Silver nanoparticles are used in conductive inks and integrated into
composites to enhance thermal and electrical conductivity.
•Optical Applications
Silver nanoparticles are used to efficiently harvest light and for enhanced
optical spectroscopies including metal-enhanced fluorescence (MEF) and
surface-enhanced Raman scattering

6. .Our method:

7. NATURAL REDUCING AGENT
 Plant source used is Aloe vera.
 Aloe gel is used for treating
osteoarthritis, bowel diseases,
fever, itching and inflammation.
 It possess anti fungul and anti
bacterial properties.

8. PREPARATION OF
EXTRACTS
 Aloe Vera contains many
hydrophobic substances.
 Therefore, we used
methanol and distilled water
in addition to aqueous
extract.
 Both extracts are placed on
Magnetic stirrer for 2 hours
and left for over night
reaction.

9. VACCUM FILTERATION
 Vacuum filtration is done 4-5
times until the liquid extract
became colorless.
 After that, the extracts are stored
at room temperature.

10. PREPARATION OF SALT
SOLUTION
 Solution of silver nitrate in distilled
water is prepared.
 30% ammonia solution is added into
the salt solution.
 Ammonia facilitates the reaction by
forming complex with the Ag ions.

11. Synthesis of Ag Nano particles
 The salt solution is added to both
extracts separately.
 The solution formed is placed at
magnetic stirrer for 4-5 hours.
 After that the solutions are stored at
room temperature for over night
reaction.

12. Formation of Ag nano-particles
The color of solution turned from bright yellow to dull reddish brown
color which indicates the formation of nano particles.

13. UV- visible Spectroscopy
 The UV-visible spectroscopy is done
through taking distilled water as blank
solution.
 Significant change in absorption is
observed at wavelength 410 nm, which
is the characteristic of silver nano
particles.

14. Preparation of Silver Nano composites
The properties of nano-sized metals (optical, magnetic, dielectric,
and thermal transport properties) leave unmodified after
embedding in polymers.
Polymer matrix + Nanomaterials = PNCs

15. Project Planner
Period Highlight: 1
PERIODS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
literature survey 1 2 1 2
100%
collection of
plant 3 2 3 2
100%
preparation of
extracts 5 3 5 3
100%
salt solution 8 3 8 3
100%
nano-Ag
synthesis 11 2 11 2
100%
UV spectr. 13 2 13 2
100%
Techniques 15 4 15 4
0%
Anti microbial
activity 19 5 19 5
0%
nano-
composites 24 6 24 6
0%
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