Nano: Quo vadis?

It is evident that a four-letter prefix of Greek origin "nano" is one of the most frequently used in scientific publications as well as in the mass media in recent years. The present review is purported to show that at nanoscale almost all branches of natural sciences effectively merge and so the natural philosophy is coming back. Moreover, the immense potential of nanotechnology sits exactly in synergetic inter-disciplinary effect. Some examples are provided from semiconductor physics and technology, as well as from biophysics, biochemistry and metallurgy to illustrate the main idea of the present work.