1. NANO TECHNOLOGY Bhimavaram Institute of Engineering &Technology
A REVOLUTIONARY DEVELOPMENT OF SCIENCE
A.Lakshmi Pavani Priyanka
and
G. Silpa
II B.Tech
Bhimavaram Institute of Engineering &Technology
Pennada - Bhimavaram, W.G.Dt

2. Definition:
“Nanotechnology is the engineering of functional systems at the molecule state”. This covers both current work and concepts that are more advanced.

3. Passive Nanostructures (2000) Active Nanostructures (2005)
GENERATIONS:
Passive Nanostructures (2000)
Active Nanostructures (2005)
Systems of Nanosystems (2010)
Molecular Nanosystems (2020)

4. PREPARATION OF NANOMATERIALS:
Chemical Methods:
Sol-gel process
Chemical combustion
Spray pyrolysis

5. PREPARATION OF NANOMATERIALS:
Mechanical Processes:
Grinding
Milling
Mechanical alloying

6. PREPARATION OF NANOMATERIALS:
PHYSICAL METHODS:
Electrical wire explosion method for producing nano powders
Chemical vapor deposition and physical vapor deposition methods for producing nanothin films
Laser ablation method for producing any nano materials Plasma arcing methods

7. Schematic illustration of the process involved in the synthesis and purification of fullerenes. Graphite rods evaporated in an arc, under Helium atmosphere.

8. SEMICONDUCTOR QUANTUM DOTS
Semiconductor quantum dots are also known as semiconductor nanocrystals
Quantum dots have no freedom in any dimension and electrons are said to be localized at a point, implying that a change in all directions changes the properties.
Confinements along one direction results in a quantum wire, leaving the electrons move only along one direction.

9. TYPES OF SEMICONDUCTOR NANOCRYSTALS
Quantization of the electronic density of states as a result of variation in the dimentsionality of materials.

10. MONOLAYER-PROTECTED METAL NANOPARTICLES
Colloidal Solution (10- 50nm diameters) has been formed when gold or silver salt is boiled with a higher concentration of sodium citrate for a few minutes.
The 3D monolayers or monolayer protected metal clusters belong to this category of materials.

11. BRUST METHOD OF PREPARING MONOLAYER PROTECTED CLUSTERS:

12. CARBON NANOTUBES
A carbon nanotube wound like a paper straw makes for a miniature semiconductor. This is just one of its many applications in electronics.
Nanotubes-the hollow threads of carbon are going to change the world.
Their honeycomb lattice of carbon atoms is the stuff of Engineers’ dream

13. FABRICATION OF CARBON NANOTUBES
The carbon nanotubes can be fabricated by many techniques
like:
Laser evaporation
Chemical vapor deposition
Carbon arc method.

14. TYPES OF CARBON NANOTUBES
Carbon Nanotubes can be fabricated in TWO types, i.e. Single-Walled and Multi-Walled

15. APPLICATIONS OF NANOTECHNOLOGY
Nanotechnology has wide applications in various
fields like:
Medicine
Diagnostics
Tissue engineering
Chemistry and environment
Filtration
Energy
Information and communication systems
Optoelectronic devices
Quantum computers, etc.

16. EDUCATION AND TRAINING IN NANOSCALE SCIENCE AND TECHNOLOGY
Frontier Sciences and Technologies represent a true opportunity to enhance a country’s qualitative and quantitative level of human capital.
These are essential for a more sustainable economic, human and social development.
In recent years, the academic world has begun to react to the expansion of the nano phenomenon.

17. NANOTECHNOLOGY ASKS US !
To get Excellence of
NANOTECHNOLOGY,
What is
our
Contribution
? ? ?