Contents Introduction to Nanotechnology Advantages of Nanotechnology Disadvantages of Nanotechnology

1. INTRODUCTION
NANOTECHNOLOGY
By
G. MAHALAKSHMI MALINI
Assistant Professor, ECE Department,
Faculty of Engineering,
Avinashilingam Institute for Home Science
and Higher Education for Women

2. CONTENTS
Introduction to Nanotechnology
Advantages of Nanotechnology
Disadvantages of Nanotechnology

3. History
• The first ever concept was presented in 1959
by the famous professor of physics Dr. Richard
P. Feynman.
• The term “Nano-technology” had been coined
by Norio Taniguchi in 1974.

4. DEFINITION OF NANOTECHNOLOGY
What is Nano?
Nano – A prefix
 from Greek word nano – meaning dwarf
 Extremely small
 In the names of units of measure – one billionth
Nano meter scale – one billionth of a meter (10-9
m)

5. Contd….
What is technology?
Technology – the brach of knowledge that deals
with creation in the fields of:
 Engineering
Industrial arts
Applied Science
Pure Science

6. Contd….
What is Nanotechnology?
 Nanotechnology is the study of manipulating
matter on an atomic scale.
Nanotechnology refers to the constructing and
engineering of the functional systems at micro
level or we can say at atomic level

7. Contd….
What is Nanoelectronics?
 Nanoelectrnics is one of the major technologies
of Nanotechnology. It plays vital role in the fiield
of engineering and electronics.
Nanoelectronics make use of scientific methods
at atomic scale for developing the Nano
machines.
The main target is to reduce the size, risk factor
and surface areas of the materials and molecules.
Machines under nano electronic process
undergoes the long range of manufacturing steps
each with accurate molecular treatment.

9. Macro, Micro, or Nano?
 A honey bee is
approximately 12nm
long
 A human hair is 60 to
100 micrometers in
diameter
 The DNA helix is 0.002
micrometers wide or
2nm wide.

10. Macro VS. Micro – Size Devices
Compared to macroscopic devices micro- size devices are
 Much smaller,
 Much higher,
 More energy efficient, and
 Constructed with fewer materials.
In equivalent applications, micro exceed Marco devices in
 Reliability,
 Efficiency,
 Selectivity,
 Response time, and
 Energy consumption

11. Micro VS. Nanotechnology
In addition to the actual size of the objects,
fabrication another primary difference
between micro and nanotechnology.
Nanotechnology uses what is refered to as the
“bottom up” approach to fabrication.
Microtechnology uses the “ top down”
approach.

12. Applications of Nanotechnology
Innovative Application
Energy
Medicine and
drugs
Nano
Technology
Nano Devices
Optical
Engineering
Defense and
Security
Bio -
Engineering
Commerce
Nano Fabrics

18. Advantages

21. Disadvantages
 loss of jobs (in manufacturing, farming, etc)
Carbon Nanotubes could cause infection of
lungs.
Oil & diamonds could become worthless
Atomic weapons could be more accessible and
destructive.