There are many types of nanotechnology, the field is cross-disciplinary. The term nanotechnology is used with different meanings in physics, chemistry, biology, medicine and materials science, but they all have in common that nanotechnology is understanding, designing, producing and controlling materials and objects at the nanoscale.
When working with nanotechnology, it is important to understand that there is a significant difference between the macro and nano scales. This applies when you work with physical, optical, mechanical or chemical properties on the nanoscale. For example, aluminium becomes explosive in nanosize, and the colour of gold particles can change from gold to green, orange, purple or red, depending on the size of the particles.
