SEM and TEM advantages and disadvantages ( microscopy)
This is a brief look at the advantages and disadvantages of the SEM and TEM, for the as level, aqa unit 1, specification
- Created by: Sally Wareing
- Created on: 16-12-12 16:53
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- Electron Miscroscopes
- SEM (Scanning Electron Miscroscope)
- Disadvantages
- Specimen must be conductive
- specimen preparation can produce aretfacts
- The resolution is not as good as the TEM
- Advantages
- Easy to use
- Sample can be seen as a 3D image
- Sample can be any thickness
- Disadvantages
- TEM (Transmission Electron Microscope)
- Advantages
- Really good magnification 5,000,000x
- Possible to investigate into a greater depth of field
- Better resolution than the SEM which only has a resolution of 2nm and the TEM has a resolution of 0.2nm
- Disadvantages
- Expensive and time consuming
- Have to have a really thin layer
- Images are in black and white
- Advantages
- SEM (Scanning Electron Miscroscope)
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