The VPSEM Laboratory houses a Leo-Zeiss 1450VPSE electron microscope equipped with an EDAX Genesis 4000 XMS SYSTEM 60 energy-dispersive spectrometer. EDS has sapphire detector with ultrathin window, digital signal processing, X-ray mapping, digital imaging, and standardless quantification.
Specifications on the Leo-Zeiss SEM include:
|Resolution||3.5nm @ 30kV (Tungsten)|
|Magnification||9x to 900,000x|
|Acceleration Voltage<||200V to 30kV|
|Probe Current||1pA to 1uA Optibeam controlled|
|Variable Pressure||1Pa to 400Pa|
|Detectors||VPSE, Everhardt Thornley Secondary Electron, BSE|
|Chamber||300mm x 270mm x 224mm|
|5 axis motorised stage||X=100mm, Y=125mm, Z=55mm, T=0 to 90 deg, R= 360 deg|
|Image Processing||Up to 3072x2208 sq pixels with noise reduction|
|System control||Leo32 with Windows 2000, with mouse and keyboard|
The laboratory is equipped with sample preparation facilities that include a Denton Vacuum DCP-1 Critical Point Dryer and a Desk II Plasma Coater with a Au/Pd target.
The VPSEM Laboratory is operated within the Department of Earth Sciences but is used by several Departments on campus. At present, on-campus and off-campus users are charged $25/hr for daytime (supervised) use. SMU graduate students are exempt from these fees if they have no external sources of research support. Commercial (for-profit) users are charged $100/hr. Rates are adjusted occasionally to reflect increasing costs.
Those interested in services provided by the VPSEM Laboratory should contact: