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Z.L. WANG: We are in the School of Material Science Engineering,
Georgia Tech. We have invented a new energy technology I believe
that's going to change the world we live in near future.
We look for new energy but energy is around us everywhere,
all the time. But most time, we waste them. Until recently we
find this can be a very important fact for energy.
Now how does it work?
So what you see here is A materials and a B material.
When they become physically contact, there's a charge
transfer. If they are separate by a gap, there's a voltage
generated. The second mold is sliding. If you have two
materials, they slide one against the other one, you can
also have a charge to here. One mold is physical contact, and
the other one is sliding, these are the two basic molds we use
for electricity generation. This is called triboelectrification
or scientific called contact electrification. And this occurs
for almost any materials we know today.
Why do we use nanomaterials here? By using nanostructure on
the surface, we can largely increase the surface area and it
[unintelligible] has the charge transfer. Without use the
pattern, with use the pattern, the power density is different
by thousand times.
When we first invented, this was fall of 2011, the output was
just three 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, smallest scale from finger
tapping, from your touchpad, from the walking to car motion,
even train motions, we can do that. We have the energy we have
been waste 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 can be harvested. That's twice of today's world
energy consumption. Will not take too long. Five years.
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