Nanotechnology is the technology at the Nano scale which is about 10-9 m. In this technology, dimensions in the range of 0.1 nm to 100 nm play a crucial role. Here, we develop a product at the molecular level. It is very interdisciplinary field and have applications in almost all science field such as physics, chemistry, biology, material science and engineering. At the Nano scale, we can manipulate and control the individual atoms and molecules in order to get better quality or efficiency. Materials at the Nano scale can have enhanced properties such as different color, higher strength, lighter weight, increased control of light spectrum and great chemical reactivity than their large scale counter-parts. []

In the 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.

In the common words, nanotechnology refers to the ability to build things from bottom up approach with atomic precision. Nanotechnology has evolved a lot since the year 2000. Now, it is out of its academic and research phase. As per Mihail (Mike) Roco of US National Nanotechnology Initiative predictions, there would be four generations of Nanotechnology:–

  1. Passive Nanostructures
  2. Active Nanostructures
  3. Systems Of Nanosystems
  4. Molecular Nanosystems