22 scanning tunneling microscopy in stm a sharp tip the apex of which is only a few atoms across is scanned over the surface of an electrically conducting sample to which a bias voltage is applied the gap between the sample and the tip is very small typically a few tenths of a nanometer and electrons are able to tunnel between them. Comparison of atomic force microscopy afm and scanning tunneling microscopy stm both afm and stm are widely used in nano science according to the different working principles though they have their own advantages and disadvantages when measuring specific properties of sample table pageindex1. Scanning tunneling microscopy stm is a technique that has been used for the surface study of nanostructures using the chemical composition of atoms and molecules in nps to image surfaces at the atomic level 270 stm was the first technique used to study nanostructure morphology and size. Atomic force microscopy scanning tunneling microscopy 2 v 2 nov 15 2020 posted by j r r tolkien media text id 659797b1 online pdf ebook epub library scanning probe microscopes capable of resolving surface detail down to the atomic level the potential of these microscopes for revealing subtle details of structure is. Tunneling microscopy 2 v 2 uploaded by eleanor hibbert this book represents the compilation of papers presented at the second atomic force microscopy scanning tunneling microscopy afm stm symposium held june 7 to 9 1994 in natick massachusetts at natick research development and atomic force microscopy scanning tunneling microscopy