Nanotechnology: Exploring the World of the Ultra-Small Nanotechnology, also known as nanotech, is a rapidly growing field of science that deals with the manipulation of matter at the atomic and molecular level. It is a multidisciplinary field that incorporates elements of engineering, physics, chemistry, biology, and materials science. The prefix “nano” comes from the Greek word for dwarf, and it refers to one billionth of something. In the case of nanotechnology, it specifically refers to one billionth of a meter.