Nanotechnology is one kind of technology or science or engineering which is conducted at the nano scale at about 1 to 100 nano meters. There are many applications of nanotechnology which creates extremely small things . It can be useful in almost all kinds of fields, science field such as, useful in biology, chemistry, physics, materials science and engineering. With the help of nano science and nanotechnology scientists are able to see and control individual atoms and molecule.Nanotechnology is the emerging field in this era of technology. It is an engineering at a very tiny or small scale.