Nanotechnology, which is sometimes shortened to "Nanotech", refers to a field whose theme is the control of matter on an atomic and molecular scale. Generally nanotechnology deals
with structures of the size 100 nanometers or smaller, and involves developing materials
or devices within that size.

Nanotechnology is extremely diverse, ranging from novel extensions of conventional
device physics, to completely new approaches based upon molecular self-assembly, to
developing new materials with dimensions on the nanoscale, even to speculation on
whether we can directly control matter on the atomic scale.

There has been much debate on the future of implications of nanotechnology. Nanotechnology has the potential to create many new materials and devices with wide-ranging applications, such as in medicine, electronics, and energy production. On the other hand, nanotechnology
raises many of the same issues as with any introduction of new technology, including concerns
about the toxicity and environmental impact of nanomaterials [1], and their potential
effects on global economics, as well as speculation about various doomsday scenarios.
These concerns have led to a debate among advocacy groups and governments on whether special
regulation of nanotechnology is warranted.