Nanotechnology originates from the Greek word meaning “dwarf”. A nanometer is one billionth (10-9) of a meter, which is tiny, smaller than the wavelength of visible light and a hundred-thousandth the width of a human hair.
Nanotechnology is the engineering of functional systems at the molecular scale. This covers both current work and concepts that are more advanced. In its original sense, nanotechnology refers to the projected ability to construct items from the bottom up, using techniques and tools being developed today to make complete, high performance products.