The document discusses nano generators, which are any nano scale devices that generate power by exploiting the piezoelectric effect. Nano generators are needed as natural energy sources are limited and can harness energy from small motions using arrays of materials like zinc oxide nanowires. They have applications in powering small electronic devices and sensors and their schematics and types like piezoelectric and flexible nano generators are shown, though uniform nanowire formation and lifetime are challenges. With further development, nano generators may one day power devices through human motion like walking.

1. Presented By: Amit kumar
Sl No: 43
Reg. No: 100101ECR019
Branch: ECE
SEC: A

2. INTRODUCTION
 What is the NANOGENERATOR?
 A Nano generator is any Nano scale device used to
generate power.
 It may be any generator that uses Nano scale tools, like
nanowires, to generate electricity.
 The Nano generator exploits the piezoelectric effect, a
phenomenon displayed by certain materials whereby
mechanical stress is converted directly into electric
current.

3.  What is need of NANOGENERATOR?
 Natural sources of energy are limited. To over
come these challenges researches are finding
alternative ways, and Nano generator is one
promising answer.
 Zhong Lin Wang's team built a Nano generator in
2007 that uses an array of Zinc-oxide nanowires to
convert ultrasonic waves into electricity.

4.  Schematic showing the
experimental setup for
the piezoelectric
charge detection from
an individual Bariumtitanate Nano-wire.

5. Schematic diagram of a Nano generator
Piezoelectric Nano generator
Flexible Nano generator

6. Applications
 Biological sensors and Nano devices(e.g. iPods)
 Micro-electromechanical sensors

7. Limitations
 It is difficult to form uniform nanowires.
 Less life time.

8. Conclusion
 The nano generator could produce as much as 4
watts per cubic centimeter based on a calculation
for a single nanowire.
 One day by placing these into people's shoes we
can generate electricity when walking.
 This could enable electric car that can run for
hundreds or even thousands of miles without a
recharge.

9. The day when we can charge our cell
phone or
iPod just by going for a stroll around the
block
could be a step closer by using Nano
generator.

10. THANK U