The Philips CM12 is a general purpose analytical transmission/scanning transmission electron microscope (TEM/STEM). It is used to visualize the structure, chemical composition, and arrangement of atoms in thin, extraordinary small specimens. This microscope was installed in 1989 and has been used for 21 years. The microscope was funded by The M. J. Murdock Charitable Trust and the OSU Research Office. The microscope will be retired from service in 2012.


  • Thermionic electron source
  • Selectable beam acceleration voltage, 20 kV to 120kV
  • Image resolution  ≤0.34nm point to point method, 0.2nm line to line method
  • Magnification range 31x – 660,000x
  • Transmission (TEM), scanning transmission (STEM), selected area diffraction (SAD), micro-diffraction (μD), and convergent beam electron diffraction (CBED), bright field and dark field operating modes.
  • X-Ray Energy Dispersive Spectrometer (EDS) for elemental spectra, map, and transect profile data