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NANOTECHNOLOGY

A nanometer is one billionth of a meter. This is about a million times smaller than the period on this line. Nanotechnology aims to make tiny machines measured in nanometers.

WHAT IS A NANOMACHINE?

A nanomachine is built from individual atoms, like the parts of a tiny construction kit, with atomic wheels and motors. A nanomachine will make other products from atoms, such as nanovehicles to transport drugs through the body’s blood stream. Vast armies of nanomachines might even assemble CARBON COMPUTERS atom by atom.

NANOTECHNOLOGY IN MEDICINE

This imaginative artwork shows how nanotechnology might work in medicine. Tiny nanorobots the size of cells are programmed to travel through the bloodstream, finding and repairing defects in the body’s organs and tissues.

WHAT IS SELF-ASSEMBLY?

Nanomachines will be designed to build and copy themselves. They will be self-assembling in a way similar to the molecules that make up living things. To build a large structure, such as a car, billions of nanomachines will be organized to work together.

ARE THERE ANY DANGERS ASSOCIATED WITH NANOTECHNOLOGY?

One danger is that self-assembling nanomachines could multiply and spread out of control, damaging natural materials. They would have to be programmed so that they could not escape into the environment in this destructive way.

CARBON COMPUTER

At an atomic scale, scientists think carbon will have better electrical properties than silicon for making computers. A computer processor could be made by linking individual carbon atoms. Only nanomachines could work at this scale.

HOW COULD NANOTECHNOLOGY BUILD A CARBON CAR?

Nanomachines could make things, such as carbon cars, by linking carbon atoms one at a time into the diamond structure. These new cars will be many times stronger, yet lighter, than existing versions made with titanium, aluminum, and steel. A carbon car built by nanomachines would be light enough to lift with one hand.

WHAT HAS NANOTECHNOLOGY ACHIEVED SO FAR?

Nanotechnology is still at a very early stage, but some progress has been made. Simple wheels, axles, and gears have been produced. Scientists have already manipulated individual carbon atoms to produce nano-scale numbers and lettering.

FIND OUT MORE

Atoms
Machines

Copyright © 2007 Dorling Kindersley

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