About Electron Microscopy –
Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM)
Electron microscopes are a collective name for different types of microscopes where electrons are used instead of electromagnetic radiation to obtain images of very small objects.
Using this technique, one can get past the resolution limit of visible light, which allows resolution of individual atoms.
The electron beam is absorbed into the air, so electro-optics and preparations must be enclosed in a vacuum chamber.
The technology is divided into two areas: Transmission electron microscope (TEM) and Scanning electron microscope (SEM).
TEM means that an electron gun accelerates an electron beam that is focused through an electromagnetic condenser lens so that a very thin beam hits the sample to be examined.
SEM is basically inverted in the same way as TEM, but the difference is that the beam is swept across the sample by creating a conical electron beam after passing the condenser lens.
When using different electron microscopes there are many needs. Everything from preparing in different ways, to storing samples. Service of the vacuum generating pumps that the machine relies on or vacuum couplings, seals and bushings. All this is something that we at Low2High Vacuum offer our customers.
When preparing, it is appreciated with qualitative tools to work with. Work often requires precision and being steady on hand.
It is also a matter of having the right tools that make the work easier, so that you do not damage the samples and thereby get worse results.
It is also important that after use your tools are properly cleaned for increased service life. A good example is the laboratory’s diamond knives. These are important tools for many researchers, but are generally expensive to purchase, so it is important to keep them clean and in good condition. To be able to clean the knives, we have several alternatives in the range, including a small table cleaner for diamond knives, but also a cheaper alternative with cleaning sticks of, for example, balsa wood.
Low2High Vacuum is a Nordic retailer for SPI Supplies Inc. We have access to SPI’s high quality range of accessories and preparation equipment for TEM and SEM electron microscopes.
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