Transmission and Scanning Electron Microscope


Transmission Electron Microscope

Scanning Electron Microscope

  • Place specimen in vacuum chamber in the middle of the machine
  • The electron gun which produces the beam uses electromagnetic coils and high voltage=electrons go at fast speeds
  • Most powerful electron microscope
  • used to see things 1nm in size
  • Electrons go through the specimen which pass through to create an image on a screen
  • Designed to make images of the surfaces of tiny objects
  • The electromagnetic coils pull the beam back and forth scanning the specimens surface slowly and systematically
  • Bounce off the specimen rather than travelling through
  • Electrons are reflected and directed at a screen
  • see things 10nm in size
  • Produce 3-D images of sharp quality


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