XEI Scientific Reports that the UCL School of Pharmacy have Applied Evactron® Plasma Technology for Cleaning their SEM Chamber.

REDWOOD CITY, CA. -April 9th 2013 - XEI Scientific Inc, maker of the popular EVACTRON® De-Contaminator™ Plasma Cleaning System for electron microscopes and other vacuum chambers, reports that a leading UK university's School of Pharmacy is using an Evactron® cleaning system on the chamber in their electron microscope.

An Evactron® De-Contamination system from XEI Scientific.

UCL's (University College London) School of Pharmacy is one of the top rated pharmacy schools in the UK having built a long tradition of academic and research excellence. Within its Pharmacology Group is the Electron Microscopy Unit which was started and managed from 1977 by David McCarthy and which uses a number of advanced electron microscopes from FEI. These provide essential support services to the School's research programs. Led by McCarthy, who has expertise in TEM/SEM/LM of pharmaceutical preparations and drug delivery systems, the unit is currently focused on providing a contract service mainly imaging drug delivery carriers which are usually low melting point polymers which may be thermally and/or vacuum sensitive.

Delivering sharp, clear images is the focus of the unit and the adoption of an Evactron downstream plasma cleaning unit from XEI Scientific/Acutance has proved an excellent investment. Degradation of biological samples at 37°C results in hydrocarbon contamination around the sharp end of the microscope column. This results in the microscope behaving erratically because of charging. For example, if the operator wishes to change the beam energy or magnification, the system starts to behave unpredictably. This may result in the image shooting off to one side or distorting which means the column needs to be realigned. This causes poor performance at low beam energies. The addition of the Evactron system to clean contamination off the sharp end of the column has resulted in a much more predictable and usable system at low beam energies.

As McCarthy observes, "as samples breakdown causing contamination, I see astigmatism issues. When this happens, I know it is time for a clean!"

The Evactron is the most cost-efficient cleaning system offered by XEI Scientific. The Evactron De-Contaminator uses a remote RF plasma source to produce gas-phase radicals that flow downstream through the chamber, eliminating contamination by chemical etch.

XEI has now sold more than 1600 Evactron systems worldwide solving contamination problems in many different environments using instrumentation such as electron microscopes, FIBs and other vacuum sample chambers. Please visit our web site for the latest details, www.evactron.com.

About XEI Scientific, Inc.

XEI Scientific Inc. invented the Evactron De-Contaminator in 1999 as the first plasma cleaner to use a downstream cleaning process to remove carbon from electron microscopes. A proprietary plasma source uses air to produce oxygen radicals for oxidation of carbon compounds for removal by the pumps. Carbon-free-vacuum produces the highest quality images and analytical results from SEMs and other vacuum analytical instruments. XEI innovations include a unique RF plasma generator, a patented RF electrode, and easy start programmed plasma cleaning. All XEI products come with a 5 year warranty and are compliant with CE, NRTL, and Semi-S2 safety standards. XEI offers a variety of Evactron® decontamination systems to meet user needs and 1600 installations around the world.

For more information on products and services offered by XEI Scientific, Inc., see www.evactron.com

For further information:
Please contact
XEI Scientific, Inc
1755 E Bayshore Road
Redwood City
CA 94063, USA
T +1 (972) 318-0196
F +1 (650) 363-1659

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