Nanotechnology is already very common in nature and can be found in all manner of natural objects including the enamel in your teeth and non-reflective eyes in moths. Nano-forces are what allows a spider to carry more than 170 times its own body weight and means geckos can hang upside down from flat sheets of glass.
The human world is a little way behind nature in the use of nanotechnology but catching up fast, tenth century church builders used gold and silver nanoparticles to prepare stained glass windows although they may not quite have understood the science behind what they were doing! Nowadays the potential of nanotechnologies is immense and their use is widespread. Some common forms of nanotechnologies in everyday use are: