... them - the transmission electron microscope (TEM) requires a small copper grid as a support, whereas the scanning electron microscope (SEM) requires a small metal disk. Also, the TEM has a maximum magnification of 250,000 times, and the SEM has a maximum magnification of 100,000 times. A specimen going under a TEM needs a heavy metal stain, whereas a specimen going under the SEM needs to be coated with carbon or gold. The transmission electron microscope allows us to see particles, which can be as close as 2 nanometres, as separate structures. The resolution of this microscope is about 2 nanometres. It can be used with high or low magnification. Under low magnification, they can produce a sharp definition of the specimen. The higher the magnification on the specimen, the higher the amount of visible detail. The scanning electron microscope gives a three-dimensional effect, which shows surface detail. It scans electron ...

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