Electron microscopy
Vacuum Evaporator in EMs
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   http://www.globalsino.com/EM/        

This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.


Due to the exposure of the deposited organic molecules to the electron beam, a hydrocarbon film is coated on the aperture surfaces in EMs. With the contamination accumulation, the contaminated apertures need to be either replaced or cleaned. The cleaning methods are:
        i) The apertures are heated with a propane torch or within a vacuum evaporator. The drawback of the heating methods is temperature gradients are created and thus the aperture strip can be deformed or even the welds in the apertures can be destroyed.
        ii) Plasma cleaning.



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