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The ARM200F is an aberration corrected STEM equipped with both an x-ray spectrometer and a special, newly developed electron spectrometer, with ultra-fast EELS that allows atomic level mapping. The instrument is part of ASU's Southwestern Center for Aberration Corrected Electron Microscopy. The ARM200F offers resolution of 0.8 Angstrom at 200kV, 120kV and 80Kv The JEOL ARM is also equipped to perform tomographic imaging, a technique often used for research in medical technology.
The ARM 200 is equipped with a Schottky field emission gun and a CEOS CESCOR hexapole aberration corrector that enables imaging resolution of 78 picometers, and beam current densities of 8 nanoamps per square nanometer. It is equipped with a JEOL 50 square millimeter (0.3 St.) windowless light-element-sensitive X-ray detector and a Gatan Enfinium EELS (Electron Energy Loss) spectrometer for high spatial resolution, high sensitivity microanalysis. This exclusive spectrometer can acquire one thousand 2,000 channel spectra per second in dual EELS mode covering a range of over 3,500 electron volts.
The microscope can be operated in high angle and medium angle annular dark-field STEM modes as well as brightfield and annular brightfield modes. It is also equipped with a Gatan slow scan CCD camera for recording high resolution, high S/N TEM images with 1.9Å Scherzer resolution and a Gatan Orius CCD cameras for recording electron diffraction patterns. There is a 64 bit, 32 GB computer for recording large data set 4D diffraction images. Specimen holders allow basic single tilt, low background double tilt, and tomography with a 75 degree tilt range.
|Cost for ASU Internal||Cost for ASU Internal with Staff Assistance||Cost for Other Academic/Non-Profit||Cost for Other Academic/Non-Profit with Staff Assistance|
All training is currently being scheduled by Karl Weiss, Karl.Weiss@asu.edu (480)965-3831
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Call the General ASU Emergency Information Phone at 7-9911 (on-campus phone) or 480-727-9911 or toll-free 877-278-2785 (877-ASU-ASU5) to get a recorded message. For non-emergencies, The ASU Department of Public Safety office can be reached at 5-3465 (on-campus phone) or 480-965-3465.
Active users can schedule time using their iLab account with the following link: TEM/STEM - ARM200F Schedule
If you are not currently in iLab please click on the following link: iLab registration
The Center for High Resolution Electron Microscopy is organized to provide easy access to instruments by campus-wide ASU researchers. Facility use is a telephone call or e-mail message away.
Although emphasis is placed on accommodating internal (ASU) researchers, all appropriate users, including industrial and educational researchers, are welcome.
Most samples can be accommodated in CHREM microscopes. The exception may be those that are particularly hazardous to human health. No radioactive samples, and the sample must survive in a vacuum and under the electron beam.