In this presentation I have clearly explained about the concept of nanotechnology, its history, types, applications, advantages and disadvantages and so on.

1. NANOTECHNOLOGY
Done by,
SENTHIL PANDI.B(17MC040)
II YEAR MECHATRONICS
SNS COLLEGE OF TECHNOLOGY.

2. OUTLINE :
• INTRODUCTION
• HISTORY
• APPROACHES OF NANOTECHNOLOGY
• NANO MATERIALS
• NANO TUBES
• APPLICATIONS OF NANOTECHNOLOGY
• ADVANTAGES AND DISADVANTAGES
• CONCLUSION.

3. INTRODUCTION :
• Nanotechnology is the art of an science of manipulating
matter at nanoscale.
• Nanotechnology is the study of making small
microscopic things.
• It is an advance to the future.
• Nanometer is a unit of measure equal to one billionth of
a meter.

4. HISTORY :
• 2000 years ago - Sulfide nanocrystals used by Greeks and
Romans.
• 1000 years ago - Gold nanoparticles of different sizes used to
produce different colours in stained glass windows.
• 1974 - “Nanotechnology” - Taniguchi uses the term
nanotechnology for the first time.
• 1981 - IBM devolops Scanning Tunneling Microscope.
• 1991 - Carbon nanotube discovered by S.Iijima.

5. APPROACHES OF NANOTECHNOLOGY :
• Bottom-Up Approach
• Top-Down Approach
Bottom-Up Approach :
 They arrange smaller components into more complex.
 Layer-by-layer self assembly.
Top-Down Approach :
 Creates smaller objects using larger objects.
 Uses principle of Molecular recognition.

6. NANOMATERIALS :
• Fullerenes.
• Carbon nanotubes.
FULLERENES :
• A fullerene is an allotrope of carbon in the form of a
hollow sphere, ellipsoid, tube, and many other shapes.
Example : Buckminister fullerene.

7. CARBON NANOTUBES :
• A carbon nanotube is an allotrope of carbon
that is shaped like a tube of carbon atoms.
• Carbon nanotubes are very tough and hard to
break, but still relatively light.

8. NANOTUBES :
• Single walled nanotube.
• Multi walled nanotube.
SINGLE WALLED NANOTUBE :

9. MULTI WALLED NANOTUBE :

10. APPLICATIONS OF NANOTECHNOLOGY :
• In curing diseases like AIDS.
• To make new surgical devices.
• Changing the untasteful medicine into tasteful.
• Nano products can be prepared at average sized
homes.

11. ADVANTAGES OF NANOTECHNOLOGY :
• Less pollution
• Low production cost
• Mass production in food and Consumables
• Technology itself
• War
• Electricity.

12. DISADVANTAGES OF NANOTECHNOLOGY :
• Atomic weapons can now be more accessible and made
to be more powerful and more destructive.
• Since these particles are very small, problems can actually arise
from the inhalation of these minute particles, much like the
problems a person gets from inhaling minute asbestos particles.
• It is more expensive.

13. CONCLUSION :
• Nanotechnology is part of a predicted future in which
dentistry and periodontal practice may become more
high-tech and more effective looking individual dental
health on a microscopic level by enabling us to battle
decay where it begins with bacteria.
• Construction of a comprehensive research facility is
crucial to meet the rigorous requirements for the
development of nanotechnologies.