What is Scanning Transmission Electron Microscopy (STEM)?
Scanning Transmission Electron Microscopy (STEM) is an advanced analytical technique that combines the principles of both transmission electron microscopy (TEM) and scanning electron microscopy (SEM). In STEM, a focused beam of electrons scans over a sample, and the transmitted electrons are collected to form an image. This technique enables high-resolution imaging and chemical analysis at the atomic scale, which is crucial for understanding the structure and function of catalysts.
