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[MUSIC PLAYING]
We are in the School of Material Science and Engineering
at Georgia Tech.
We have invented a new energy technology
I believe that can change the world we live in
in the near future.
We look for new energy, but energy is around us
everywhere all the time.
But most time, we waste it.
Until recently, we found this can
be a very important effect for energy.
Now, how does it work?
So what you see here is A material and a B material.
When they become physically contact,
there's a charge transfer.
If they are separated by a gap, there's a voltage generated.
The second mode is sliding.
If you have two materials, they slide at one
against the other one, you can also have a charge here.
One mode is physical to contact, and the other one is sliding.
This is the two basic modes we use for electricity generation.
This is called triboelectrification
electrification, or scientific, called contact electrification.
And this occurs for almost any materials we know today.
Why do we use nanomaterial here?
But using nano structure on the surfaces,
we get a large increase in the surface area
and hugely enhance the charge transfer. Without using pattern--
With using the pattern, the power density
is different by 1,000 times.
When we first invented, this was fall of 2011,
the output was just 3 volts.
Today, our best can be 10,000 volts.
Mechanical energy is everywhere, independent of weather,
independent of day or night, independent of season.
So anything you can think of-- smaller scale,
from finger tapping, from your touch pad, from the walking,
to car motion, even train motions, we can do that.
We harvest energy we have been wasting for years.
We never use them.
So I anticipate this can not only contribute the power
source for portable electronics, but also can
contribute power source for large scope energy need.
It can contribute significantly to the worldwide energy
need in the near future.
And we even think for big ocean wave,
theoretically they say 31 terawatt
energy can be harvested.
That's twice of today's world energy consumption.
It will not take too long-- five years.