1. Nanomaterials are defined as materials
with at least one external dimension in the
size range from
approximately 1-100 nanometers.
Example:
Volcanic ash,
Soot from forest fires

2. PREPARATION OF NANOMATERIALS
Chemical Methods
Physical Methods
Mechanical Methods

3. PHYSICAL METHODS
1.Electrical Wire Explosion Method
2.Chemical Vapor Deposition
3.Physical Vapor Method
4.Laser Ablation Method

4. ELECTRICAL WIRE EXPLOTION METHOD
•Nano powders

5. NANO SILVER POWDER

6. CHEMICAL VAPOR DEPOSITION and
PHYSICAL VAPOR DEPOSITION
•NANOTHIN FILMS

8. LASER ABLATION METHOD
Laser ablation is the process of removing material from a solid
surface by irradiating it with a laser beam.
At low laser flux, the material is heated by the absorbed laser energy
and evaporates or sublimates.
 At high laser flux, the material is typically converted to a plasma.
 Usually, laser ablation refers to removing material with a pulsed laser,
but it is possible to ablate material with a continuous wave laser beam
if the laser intensity is high enough.

9. `

10. MECHANICAL METHODS
1)Grinding
2)Milling
3)Mechanical Alloying

11. Ball Milling machine produces
nanoparticles by collisions of balls with the
fine powder particles.
Repeated to get nanoparticles