Currently , Scientists find two nano-size structures of particular interest nanowires and carbon nanotubes. In the last couple of years carbon nanotubes have overshadowed nanowires.
A Carbon nanotube is a nano-size cylinder of carbon atoms.Imagine a sheet of carbon atoms , which would look like a sheet of hexagons.If you roll that sheet into a tube , you'd have a carbon nanotube.
Carbon nanotube properties depend on how you roll the sheet.In other words even though all the carbon nanotubes are made of carbon , they can be very different from one another based on how you align the individual atoms.
With the right arrangement of atoms , you can create a carbon nanotube that's hundreds of times stronger than steel butsix times lighter.
Engineers plan to make building materials out of carbon nanotubes , particularly for things like cars and airplanes.
Lighter vehicles would mean better fuel efficiency , and the added strength translates to increased passenger safety.
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