VG HB-5 STEM
The STEM is a high resolution combination of a SEM and TEM, giving it the abilities of both. Chief among the uses of such an instrument are its excellent compositional capabilities; able to detect a single heavy atom in a spot a few manometers wide.
A few facts about the STEM:
- 100kV accelerating voltage
- Room Temperature Field Emission Electron Source (high brightness)
- Vacuum system capable of 1x10-12 Torr
- Sample tilting; 45º
- Heated (500ºC) and cooled (liquid nitrogen) stages
- Capable of reactive gas introduction at controlled rates
- Equipped with Secondary and
Backscattered detectors for SEM type work
- Capable of Bright Field,
Annular Dark Field, SAED
and CBED imaging
- Equipped with EDS capable of detecting Boron and forming X-ray maps of composition; composition to within 0.1 wt% (see future projects for information on proposed EELS system)
- Areas as small as 1 nm in diameter can be accurately characterized with EDS, diffraction and imaging
- Maximum sample size; 5 mm diameter, 2 mm thickness disk
- Digital imaging system capable of image capture and storage in electronic form (TIFF)
- High quality, medium cost Polaroid type 55 film output, yielding both a negative and positive image
- Current Project:
- A unique position sensitive detector system is being implemented by Dr. Brian Robertson and Gary Krichau for quantitative magnetic mapping of thinned materials.
View some sample STEM results.
More information about what Electron Microscopes are and how they work
View the Facility Use Policy on this Microscope
View the Facility Scheduling Policy
Schedule a session on the VG-HB5 STEM