Nano engineering is the application of physical and scientific principles for solving the problems of society with Regarding to Creating or Rebuilding Structures at Molecular level as this field mostly deals work at nanoscale. It derives its name from the nanometre, a unit of measurement equalling one billionth of a meter.
1981: Gerd Binnig and Heinrich Rohrer invented the first atomic level microscope called a scanning tunneling microscope that allowed scientists to see individual atoms. and so Nano Engineering field emerge.