Nanotechnology is the field of research and innovation concerned with building materials and devices – on the scale of atoms and molecules.
A nanometre is one-billionth of a metre: ten times the diameter of a hydrogen atom. The diameter of a human hair is, on average, 80,000 nanometres. At such a scale, the ordinary rules of physics and chemistry no longer apply. Material characteristics, such as colour, strength, conductivity, and reactivity, can differ substantially between the nanoscale and the macro. Carbon ‘nanotubes’ are 100 times stronger than steel but six times lighter.