Nanotechnology

Unit 6, Lesson 5, Ex.4a
What’s nanotechnology?

Imagine if you climbed out of the shower only to discover you'd gone smaller by about 1500 million times! If you stepped into your living room, what you'd see around you would not be chairs, tables, computers, and your family but atoms, molecules, and cells. Down to "nanoscale," you'd not only see the atoms that everything is made from—you'd actually be able to move them around! Now imagine you started sticking those atoms together in interesting new ways. You could build all kinds of fantastic materials, everything from brand new medicines to computer chips. Making new things on this fantastic small scale is called nanotechnology and it's one of the most exciting and fast-moving areas of science and technology today.

How small is nanometer?

We live on a scale of meters and kilometers, so it's quite hard for us to imagine a world that's too small to see. Nano means "billionth", so a nanometer is one billionth of a meter.

This is all very interesting and quite impressive, but what use is it?

This is the work of nanoscience: it helps us understand why things happen by studying them at the smallest possible scale. Once we understand nanoscience, we can do some nanotechnology: we can put the science into action to help solve our problems.

How do you work on the nanoscale?

Your fingers are millions of nanometers long, so it's no good trying to pick up atoms and molecules and move them around with your bare hands. That would be like trying to eat your dinner with a fork 300 km long! Amazingly, scientists have developed electron microscopes that allow us to "see" things on the nanoscale and also work with them.

When did nanotechnology start?

Engineering on the nano-scale isn't a new thing. Animals and plants have long been using the nanoparticles and nanostructures in their shells, skins and wings.

Bacteria and viruses act just like nanorobots. For example, a common bacteria called E.coli can build itself a little nanotechnology tail that it whips around like a kind of propeller to move it closer to food.

Can we use nanotechnology in our everyday life?

It could be you're already using nanotechnology. Clothes have just got clever with nanotechnology: the materials stay clean, warm, strong and dry.

Nanotechnology is big news in sport. Tennis and golf players, skiers and mountain bikers are already enjoying the advanced technology with lighter, stronger sports equipment.

The displays on everything from iPods and cellphones to flatscreen TVs are made from plastic built on the nanoscale.

One of the most exciting areas of nanotechnology is building incredibly small machines from individual atoms. Nanomachines could be made into nanorobots (sometimes called "nanobots") that could be injected into our bodies to carry out repairs or sent into dangerous environments.

Nanotechnology can be used in the food industry right from field to table. For example, nanomaterials could help keep food fresh for longer. Scientists are already manufacturing nano-sized vitamins that are easier for our bodies to take in. In the future they hope to create 'interactive' food - food and drink that could change colour, flavour or ingredients on demand.

That’s unbelievable!