Scientists and engineers have multiple ways of measuring the smallest aspects of our world, including scanning tunnelling electron and atomic force microscopes. Now, a team of researchers in ...

SEM stands for scanning electron microscope. The SEM is a microscope that uses electrons instead of light to form an image. Since their development in the early 1950's, scanning electron microscopes ...

In scanning electron microscopy, a thermionic electron source such as a tungsten ... Because of the microscopic size of the electron source, the beam produced by this emitter is one of the smallest ...