preparation of Nanomaterials

WHAT ARE NANOMATERIALS?

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

PREPARATION OF NANOMATERIALS

Chemical MethodsPhysical MethodsMechanical Methods

PHYSICAL METHODS

1.Electrical Wire Explosion Method2.Chemical Vapor Deposition 3.Physical Vapor Method4.Laser Ablation Method

ELECTRICAL WIRE EXPLOTION METHOD

•Nano powders

NANO SILVER POWDER

CHEMICAL VAPOR DEPOSITION and PHYSICAL VAPOR DEPOSITION

•NANOTHIN FILMS

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.

LASER ABLATION METHOD

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MECHANICAL METHODS

1)Grinding2)Milling3)Mechanical Alloying

MECHANICAL ALLOYING

Ball Milling machine produces nanoparticles by collisions of balls with the fine powder particles.

Repeated to get nanoparticles