Nanoscience and nanotechnology is a very promising field. It is the study of extremely small things in different domains of science. Glass staining with gold or silver particles are kind of ancient nanotechnology. Richard Feynman has been credited with coming up with the concept of nanotechnology.In 1959 he gave a talk called "There´s Plenty of Room at the Bottom" where he described a process in which scientists would be able to manipulate and control individual atoms.
Nano is basically a unit of measurement like kilo, mili or micro we use regularly. So, how small nano is? Its really hard to imagine one billionth of a meter that is 10^-9 of a metes is a nanometer. For the amusement you can say there are 25,400,000 nanometers in an inch, or a newspaper is 100,000 nanometers thick.
This technology is very sophisticated and to play with this technology scientists require the right tools. In 1980 IBM scientists invented STM(Scanning Tunneling Microscope. Using such a machine, they could observe a molecule structure. In 1981 Professor Norio Taniguchi coined the term "Nanotechnology".
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