The principle of scanning probe microscopes (SPM) was lust described by J. A. O’Keefe in the 1960s. In 1982, the scanning tunnelling microscope (STM), the first supreme example of SPM family, was developed; for which Binnig and Rohrer received the 1986 Nobel Prize in Physics. Shortly after that, in 1986 Binnig together with Quate and Gerber introduced the first atomic force microscope (AFM). Unlike the STM, the AFM images