Electron Microscopy 101 Archives - Advancing Materials

Two photos with very different depths of fields. (Left) A close-up of a flower – when the picture is taken from a short distance, the background will be blurred. (Right) A landscape picture – the longer distance increases the depth of field from a few centimeters to several kilometers.

Optimizing the Depth of Field in an SEM

Depth of field in SEM imaging When it comes to “dep...

Schematic of an electron being backscattered by the interaction with the atom nuclei.

Backscattered Electrons in SEM Imaging

Unlike optical microscopes, scanning electron microsc...

X-rays are generated using EDX following a two-step process. First, the energy transferred to the atomic electron knocks it off, leaving behind a hole. Second, its position is filled by another electron from a higher energy shell, and the characteristic X-ray is released.

EDX Analysis with SEM: How Does it Work?

From searching for food contaminants to identifying machine ...

Electron – matter interactions: the different types of signals generated

SEM: Types of Electrons and the Information They Provide

Electron microscopes are versatile instruments that can prov...

Basic components of an SEM

What is SEM? Scanning Electron Microscopy Explained

Scanning electron microscopes (SEMs) have become powerful an...

Illustration comparing the various electron emission sources. For thermionic sources the Wehnelt cylinder focuses the electrons as they flow toward the anode. In a field emission source, the first anode accelerates the electrons whereas the second anode focuses them.

How Do You Make an Electron Beam?

Sources of electrons Nothing is more essential to the electr...

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