nanotechnology by dr.imran aziz

1. NANOTECHNOLOGY
Dr. MOHAMMAD IMRAN AZIZ
Assistant Professor(Sr.)
Department of Physics,
Shibli National Post Graduate College,
Azamgarh- 276001
E-mail: aziz_muhd33@yahoo.co.in

2. CONTENTS
INTRODUCTION
NANOTECHNOLOGY BASICS
SALIENT FEATURES
APPROACH, CONCEPTS & STRUCTURE
APPLICATIONS
CONCLUSION

3. Nanotechnology Is Not A New Phenomenon
The Lycurgus Cup: 4th Century A.D.
Green = Reflected Light
Red = Transmitted Light
Image of silver/gold
nanoparticle in the
Lycurgus cup
The British Museum. http://www.thebritishmuseum.ac.uk/ (March 2004)

4. Nanotechnology in medieval
period( 17th centuary)
•The steel of Damascus blades, which were first encountered by the Crusaders
when fighting against Muslims, had features not found in European steels
• A characteristic wavy banding pattern known as damask, extraordinary
mechanical properties, and an exceptionally sharp cutting edge.
• Here we use high-resolution transmission electron microscopy to examine a
sample of Damascus sabre steel from the seventeenth century and find that it
contains carbon nanotubes as well as cementite nanowires.
Nature 444, 286 (16 November 2006)

5. “There’s Plenty of Room at the
Bottom”
(Richard Feynman’s Presentation – Dec 29, 1959)

6. Why Is NanoScience Popular Now
Development of Tools – “Seeing” and
“Manipulating” at the Nano-Level
Nano-
– STM (Scanning Tunneling Microscopy)
– AFM (Atomic Force Microscopy)
– Other tools

7. NANOTECHNOLOGY
THE
REVOLUTION
OF ENDLESS
POSSIBILITIES

8. NANOTECHNOLOGY BASICS

9. BIG FUTURE FOR THE TINY
TECHNOLOGY

10. UNDERSTANDING SIZE
How big (small) are we talking
about?

11. UNDERSTANDING SIZE
1 meter

12. UNDERSTANDING SIZE
10 centimeters

13. UNDERSTANDING SIZE
1 centimeter

14. UNDERSTANDING SIZE
100 micrometers

15. UNDERSTANDING SIZE
10 micrometers

16. UNDERSTANDING SIZE
1 micrometer

17. UNDERSTANDING SIZE
100 nanometers

18. UNDERSTANDING SIZE
10 nanometers

19. UNDERSTANDING SIZE
1 nanometer

20. NANOMETER………..(nm)
A nanometer is one billionth of a
meter (10-9 m). This is roughly ten
(10-
times the size of an individual atom.

21. SO WHAT IS IT?
Nanotechnology is basically
mechanisms that have been built
by nanoscale components using
to place every atom and
molecule in a desired place

22. Nanofabrication: Top-Down vs.
Top-
Bottom-
Bottom-Up
You could make one slice 1 nm
size and smallest size is part of
Nanostructure of bulk material

23. Why Is Nanotechnology So Cool?
Bulk Gold
mp = 1064° C
Color = gold
1 nm gold particles 20 nm gold particles 100 nm gold particles
mp = 700 °C mp = ~1000 °C mp = ~1000 °C
λmax = 420 nm λmax = 521 nm λmax = 575 nm
Color = brown-yellow Color = red Color = purple-pink

24. nanostructures
Nanostructures are defined as any
material which has one or more
dimensions which are measured on the
the scale of nanometers. This definition
has been applied for structures that have
a conning dimension ranging from 600 nm
in size to structures which are only one or
two atoms in size (less than a
nanometer). These structures vary widely
in form and can consist of slabs, wires,
dots, rings, tubes,hollow spheres and
more

25. Nanotubes

26. Nanowires

27. Nanoslab

28. Nanodots

29. APPLICATIONS

30. Nanotechnology Applications
Information Technology Energy
• More efficient and cost
• Smaller, faster, more
effective technologies for
energy efficient and
energy production
powerful computing
− Solar cells
and other IT-based − Fuel cells
systems − Batteries
− Bio fuels
Medicine Consumer Goods
• Cancer treatment • Foods and beverages
−Advanced packaging materials,
• Bone treatment sensors, and lab-on-chips for
• Drug delivery food quality testing
• Appetite control • Appliances and textiles
• Drug development −Stain proof, water proof and
• Medical tools wrinkle free textiles
• Diagnostic tests • Household and cosmetics
• Imaging − Self-cleaning and scratch free
products, paints, and better
cosmetics

31. CONCLUSION
Improvements and developments in
existing products, such as stronger
and lighter materials.
Potential to initiate completely new
products and industries that do not
exist today

32. + -
[B ][NO ]
Thank You!