Name: グラフェンの作り方 (How To Make Graphene)
Uploaded: 2021-01-14T04:58:22.000Z
Duration: 3 min 41 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Picture this: you are thrown into a dingy room and told "you can't leave until you have

created the thinnest material known to man." Not only that, it must also be the strongest,

the best thermal conductor and as good at conducting electricity as copper.

But luckily, you know something about nanotechnology. You know, really really tiny devices and materials

that are less than 100 nanometers in size. Of course I don't have to tell you a nanometer

is a billionth of a meter. That's roughly the size of ten atoms.

But how do you create something that tiny? It's time to embrace your inner MacGyver.

You're gonna need a pencil, some scotch tape and a healthy dose of elbow grease.

A pencil contains not lead but graphite, which consists of sheets of carbon in a hexagonal

lattice. When you write, layers of graphite slide off the tip of the pencil and stick

to the paper. Usually, many layers are stacked on top of each other but once in a while you

get a single layer of carbon atoms. And this is called "graphene"

In 2004, Andre Geim and Konstantin Novoselov created graphene using nothing but graphite

and scotch tape. They placed a graphite flake onto the tape, folded it in two and then cleaved

the flake in half. They repeated this procedure a number of times and then studied the resulting

fragments. To their astonishment they found some of the pieces were only a single atom

thick. This was particularly unexpected because it was thought a single layer of graphite

would not be chemically stable, especially at room temperature.

Graphene conducts electrons faster than any other substance at room temperature. This

is because of the extraordinarily high quality of the graphene lattice. Scientists are yet

to find a single atom out of place in graphene. Since the electrons aren't scattered by defects

in the lattice, they go so fast that Einstein's relativity must be used to understand their

motion. And this perfect lattice is created by the very strong yet flexible bonds between

carbon atoms -- making the substance bendable but harder than diamond.

Graphene in incredibly strong -- if you could balance an elephant on a pencil and support

the pencil on graphene, the graphene wouldn't break. Of course the pencil would.

For their discovery, Geim and Novoselov were awarded the Nobel Prize for physics in 2010.

And this is only the beginning for Graphene. Scientists are hard at work exploiting its

unique properties to create thin, transparent, flexible touch screens,

Smaller, faster, more energy efficient computers Tough composite materials

And now consider this is only one aspect of nanotechnology, so in order to think big you