Abstract
In 1960, Richard Feynman, one of the greatest theoretical physicists of his time [1], presented a visionary and prophetic lecture at a meeting of the American Physical Society. This famous lecture was entitled: "There is Plenty of Room at the Bottom" and it speculated on the possibilities and potentialities of nano-sized materials [2]. However, the development of nanotechnology could only start many years later, after adequate microscopy techniques for nano-sized materials imaging (e.g., STM, AFM, HR-TEM) were made available. In the last few years, nanotechnology has become the main focus of research activity in many countries and is a definitive new science.