What is Scanning Transmission Electron Microscopy (STEM)?

From this chapter, we start with studying scanning transmission electron microscopy (STEMScanning transmission electron microscopy (STEM)) and its imaging theory. The STEMSTEM uses a fine electron probeFine electron probe and a scanning system, whichScanning system seems different from TEM explained in previous chapters. The image intensity is equivalent to that by TEM due to the reciprocal theoremReciprocal theorem in optics. The STEM is nowadays recognized as a very effective tool for structural and chemical analysesStructural and chemical analyses of nanomaterialsNano-materials.