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Jackson School of Geosciences
Geology Department
Department of Geological SciencesBureau of Economic GeologyInstitute for Geophysics
Department of Geological Sciences
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Electron Microbeam Lab

Scanning Electron Microscope (SEM)

Contact: Dr. Donggao Zhao
Phone: 512-471-1177 (O), 512-471-4949 (lab)
email: dzhao@jsg.utexas.edu


Location  GEO 5.108

 

 

Overview


Installed in 2008, our SEM has three detector systems. In secondary electron (SE) or backscattered electron imaging mode magnifications from approximately 20x to 300,000x are available. The energy dispersive X-ray detector (EDS) provides qualitative and semi-quantitative analysis of elements .

Training


Samples


A wide range of sample types can be examined in our SEM. All samples must have a conductive coating applied to their surface, either sputtered gold or evaporated carbon. Samples must contain no volatiles (water is the main concern, but some oil-saturated samples might also be unsuitable, for example). Typical samples are small enough to be mounted on 1-cm diameter Al-cylinders. Four such samples can be loaded at the same time. Somewhat larger samples, up to a few cm on a side, can also be used, depending upon whether they fit through the airlock and pose no possibility of colliding with the detectors. CL imaging requires polished thin sections or rock slabs.
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