Electron microscopy
 
Electron Dose of Electron Beam
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   http://www.globalsino.com/EM/        

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Typical high-dose STEM imaging conditions with a dose of ~1.0 x 108 e-2 are an electron beam current of ~50 pA, a pixel dwell time of 20 µs, and a pixel size of 0.05 Å2. In many cases, e.g. for biological materials, due to specimen damage by the electron beam, low dose needs to be used. The most straightforward method to lower the electron dose is to reduce the pixel dwell time (i.e., increasing the STEM scanning speed).

 

 

 

 

 

 

 

 

 

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