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Transmission Electron Microscope
A Zeiss EM902 provides for our transmission electron microscopy (TEM) needs.
TEM involves the manipulation of an electron beam which passes through a specially prepared ultrathin section of a specimen to obtain a greatly enlarged, high-resolution picture of the specimen's internal structures.
The Zeiss EM902 has a working magnification range of from 150x to 400,000x in 16 steps at a resolution of >0.5 nm and working accelerating voltages of 50 and 80 kV.
The vacuum system consists of a differential pump system with turbomolecular pump (170 l/s pumping capacity) and a two-stage rotary ruffing pump (8 m3/h pumping capacity), and provides a working high vacuum of <9x10-7 mbar.
The system is equipped with an integrated imaging electron energy spectrometer that consists of six lenses and a prism-mirror-prism type spectrometer. The imaging spectrometer analyzes electron energy for energy selected imaging. This provides for improved resolution and contrast in brightfield and darkfield imaging, structure-specific image contrast of thin unstained specimens, and high-resolution element-distribution imaging.
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