Nanotechnology

Group

Nanotechnology….?

• Nanotechnology is engineering at the molecular (groups of atoms) level

• It is the collective term for a range of technologies, techniques and processes that involve the manipulation of matter at the smallest scale (from 1 to 100 nm2)

History of nanotechnology

In 1959 Richrad Feynman presented ideas for creating

Nano scale machines

Norio Taniguchi introduced the term

‘nanotechnology’

1980s, development in this field was greatly enhanced with

advances in electron microscopy

Approaches in nanotechnology

Top-down Approach

Creating Nano-scale materials by physically or chemically breaking down

larger materials

Bottom-up Approach

Assembling Nano materials atom-by-atom or molecule-by molecule

(self assembling)

Example for Bottom-up and Top-down approach

Nano materials Nano powders - building blocks of nano materials (particles less than 100 nm in size)

Porous metallic ‘nanocubes’

store large amounts of H2

Nanoparticles of gold fornew catalysts

The scale ofnanopowders

www.cordis.lu/nanotechnology

Applications of Nano-technology

• Chemistry

• Engineering

• Electronics

• Textile

• Biomedical

• Aerospace

Applications in science ,biology,chemistry,Aerospace

Applications in textile and electronics

Nanotechnology in Agriculture

Plant productionEx: Delivery of

DNA to plants

Animal ProductionEx: Nano tube

sensors to detect hormone level

changes

Animal or Plant

HealthEx: Detect pathogens

etc...

Animal or Plant

HealthEx: Detect pathogens

etc...

Carbon nanotubes (sensors, fuel cells, computers and televisions)

Nano membrane filtration systems (safe, clean, affordable water)

Properties of Nanomaterials

• Mechanical properties

• Physical properties

• chemical properties

• Structural properties